2104 injector cooling system. Cooling system

The cooling system (CO) of the engines of VAZ 2105, 2107 cars is designed to maintain their required operating temperature. The image above shows its diagram.

Main elements of the engine cooling system of VAZ 2105, 2107 cars

— Engine cooling jacket

Cavities around the engine cylinders, in the cylinder head and in the intake manifold through which coolant circulates, removing excess heat from them.

— Pump (water pump)

Designed to ensure forced circulation of liquid through the cooling system. It is a shaft with an impeller rotating on a bearing in an aluminum housing. Driven by a belt drive from the generator pulley and crankshaft. It is recommended to periodically check the belt tension, since if it slips, the pump cannot ensure effective coolant circulation and the engine will fail. The belt deflection under a force of 10 kgf should be within 10-15 mm.

— Radiator

Designed to cool the liquid while the car is moving. Consists of two tanks and two rows of tubes connecting the tanks. It has a plug with inlet and outlet valves on the filler neck. The exhaust valve opens when the liquid becomes very hot and the pressure in the system increases. In this case, part of the liquid is released through it into the expansion tank.

- Expansion tank

Designed to remove highly heated and pressurized coolant from the main system. Has a plug on the filler neck. There is a valve in the plug that opens when the pressure in the system exceeds.

— Thermostat

The thermostat is designed to maintain normal engine temperature conditions by connecting or disconnecting the small and large circles of the cooling system. On a cold engine, the coolant circulates in a small circle (pump, cylinder head, cylinder block, heater, upper part of the thermostat). Her temperature is rising quickly. After warming up the coolant to 80 degrees. The thermostat thermocouple is triggered, opening its bypass valve. The liquid begins to flow through the lower part of the thermostat into the radiator (large circle), where it cools somewhat. The normal and efficient operation of the engine cooling system as a whole depends on the serviceability of the thermostat.

— Cooling fan

With a four-blade impeller combined with an electric motor. Installed on the radiator. Designed for forced cooling of liquid passing through the radiator. It turns on when the temperature sensor (TM-108) installed in the lower radiator tank, on the left, is triggered. It closes its contacts at a coolant temperature above 89-95 degrees, and opens at 84-90 degrees.

— Heater (interior heater radiator)

Designed to heat the car interior. It is part of the small circle of the cooling system, so it warms up first. It has a tap that shuts off the liquid circulating through it. The crane is controlled by a lever from inside the car.

— Pipes and hoses

Designed to ensure coolant circulation throughout the system.

To allow the driver to monitor the temperature state of the engine, there is a dial gauge for the coolant temperature on the instrument panel, connected to a temperature sensor screwed into the engine cylinder head.

Notes and additions

— The operating temperature of the engine, maintained by its cooling system, is in the range of 80-94 degrees.

— When the engine is cold, you should always check the coolant level. The temperature of the engine and, accordingly, the correctness of its operation directly depend on its volume. At an air temperature of 18-20 degrees. The coolant level should be 4 cm above the MIN mark in the expansion tank.

— The frequency of replacing coolant on the engines of VAZ 2105, 2107 cars is 30,000 km.

1. Fluid drain pipe from the heater radiator to the coolant pump.
2. Coolant drain hose from the inlet pipe.
3. Coolant drain hose from the heater radiator.
4. Fluid supply hose to the heater radiator.
5. Thermostat bypass hose.
6. Cooling jacket outlet pipe.
7. Radiator supply hose.
8. Expansion tank.
9. Tank cap.
10. Hose from radiator to expansion tank.
11. Radiator plug.
12. Plug outlet (steam) valve.
13. Inlet plug valve.
14. Upper radiator tank.
15. Radiator filler neck.
16. Radiator pipe.
17. Radiator cooling fins.
18. Fan shroud.
19. Fan.
20. Coolant pump drive pulley.
21. Rubber support.
22. Window on the side of the cylinder block for supplying coolant.
23. Oil seal cage.
24. Coolant pump roller bearing.
25. Pump cover.
26. Fan pulley hub.
27. Pump roller.
28. Locking screw.
29. Oil seal seal.
30. Pump housing.
31. Pump impeller.
32. Pump inlet pipe.
33. Lower radiator tank.
34. Radiator outlet hose.
35. Radiator belt.
36. Coolant pump.
37. Coolant supply hose to the pump.
38. Thermostat.
39. Rubber insert.
40. Inlet pipe (from the radiator).
41. Main valve.
42. Bypass valve.
43. Thermostat housing.
44. Overflow hose connection.
45. Hose connection for supplying coolant to the pump.
46. Thermostat cover.
47. Working element piston.
48. I. Thermostat operation diagram.
49. II. Liquid temperature is less than 80 C.
50. III. Liquid temperature 80 - 94 C.
51. IV. Liquid temperature is more than 94 C.

The engine cooling system is liquid, closed type, with forced circulation of liquid. System capacity is 9.85 liters, including the interior heating system. The cooling system consists of the following elements: coolant pump 36, radiator, expansion tank 8, pipelines and hoses, fan 19, block cooling jackets and cylinder head. When the engine is running, liquid heated in the cooling jackets flows through the outlet pipe 6 through hoses 5 and 7 into the radiator or thermostat, depending on the position of the thermostat valves. Next, the coolant is sucked in by pump 36 and supplied again to the cooling jackets. The cooling system uses a special liquid TOSOL A-40 - an aqueous solution of Tosol-A antifreeze (concentrated ethylene glycol with anti-corrosion and anti-foaming additives with a density of 1.12-1.14 g/cm2). TOSOL A-40 is blue in color with a density of 1,078-1,085 g/cm2, has a freezing point of minus 40 C. The coolant level is checked on a cold engine (at a temperature of plus 15-20 C) by the liquid level in the expansion tank 8, which should be 3-4 mm above the “MIN” mark. The density of the liquid is checked with a hydrometer during vehicle maintenance. When the density of the liquid increases and the level decreases, distilled water is added. At normal density, add liquid of the brand that is in the cooling system. If the density of the coolant is reduced and it is necessary to operate the vehicle in the cold season, the fluid is replaced with a new one. To monitor the coolant temperature, there is a sensor installed in the cylinder head and a pointer on the instrument panel. Under normal temperature conditions of the engine, the indicator arrow stands at the beginning of the red field of the scale within 80-100 C. The transition of the arrow to the red zone indicates an increased thermal condition of the engine, which can be caused by problems in the cooling system (loose pump drive belt, insufficient amount of coolant fluid or thermostat malfunction), as well as difficult road conditions. The fluid is drained from the system through drain holes closed by plugs: one in the left corner of the lower radiator tank 33, the other in the cylinder block on the left in the direction of travel of the car. The car's interior heater is connected to the cooling system. The heated liquid from the cylinder head flows through hose 4 through the heater radiator valve, and is sucked off through hose 3 and tube 1 by pump 36. The coolant pump is a centrifugal type, driven from the crankshaft pulley by the generator drive V-belt. The pump is attached to the cylinder block on the right side through a sealing gasket with bolts with a tightening torque of 22-27 Im (2.2-2.7 kgcm). The pump housing 30 and cover 25 are cast from aluminum alloy. In the cover, in bearing 24, which is locked with a screw 28, a roller 27 is installed. Bearing 24 is double-row. non-separable, without internal clip. The bearing is filled with grease during assembly and is not lubricated during operation. The impeller 31 is pressed onto the roller 27 on one side, and the hub 26 of the pump drive pulley on the other. Impeller end. in contact with the sealing ring, hardened with high frequency currents to a depth of 3 mm. The sealing ring is pressed against the impeller by a spring through a rubber cuff 29. The seal is non-separable and consists of an outer brass ring 23, a rubber cuff and a spring. The oil seal is pressed into the pump cover 25. The pump housing has an inlet pipe 32 and a window 22 towards the cylinder block for supplying coolant to the pump. With normal tension of the pump drive V-belt, the belt deflection under a force of 100 N (10 kgf) should be within 10-15 mm. Fan Fan 19 is a four-blade impeller made of plastic, which is bolted to the hub 26 of the pump drive pulley. The fan blades have a variable radius installation angle and, to reduce noise, a variable pitch along the hub. For better operating efficiency, the fan is located in a casing 18. which is bolted to the radiator brackets. Radiator and expansion tank. A radiator with an upper 14 and lower 33 tanks, with two rows of brass vertical tubes 16 and tinned cooling plates 17 is attached with four bolts to the front of the body and rests on rubber supports 21. The filler neck 15 of the radiator is closed with a plug And and connected by a hose 10 to a translucent plastic expansion tank 8. The radiator cap has an inlet valve 13 and an outlet valve 12, through which the radiator is connected by a hose to the expansion tank. The intake valve is not pressed against the gasket (gap 0.5-1.1 mm) and allows coolant to enter and exit into the expansion tank when the engine is heating and cooling. When the liquid boils or a sharp increase in temperature due to low throughput, the inlet valve does not have time to release liquid into the expansion tank and closes, disconnecting the cooling system from the expansion tank. When the pressure increases when the liquid is heated to 50 kPa, the outlet valve 12 opens and part of the coolant is discharged into the expansion tank. The expansion tank is closed with a plug, which has a rubber valve that operates at pressure close to atmospheric. Since 1988, radiators with aluminum cores made of two rows of horizontal round aluminum tubes and aluminum cooling plates began to be installed on the engines of VAZ2105 and -2104 cars. Two-way radiator with plastic tanks and pipes for connecting hoses. One of the tanks has a partition. The radiator is dismountable, the core is attached to the tanks through rubber seals. To increase the efficiency of liquid cooling, aluminum cooling plates are stamped with a notch, and plastic turbulators in the form of corkscrews are inserted into some of the tubes. All this ensures turbulent movement of air and liquid in the tubes. It must be remembered that it is not recommended to use water in the cooling system as a coolant with aluminum radiators in order to prevent corrosion of the aluminum tubes. Thermostat and cooling system operation The cooling system thermostat accelerates engine warm-up and maintains the required thermal operating conditions of the engine. At optimal thermal conditions, the temperature of the coolant should be 85-95 "C. Thermostat 38 consists of a body 43 and a cover 46, which are rolled together with the seat of the main valve 41. The thermostat has an inlet pipe 40 for the inlet of cooled liquid from the radiator, a pipe 44 of the bypass hose 5 for bypassing liquid from the cylinder head to the thermostat and pipe 45 for supplying coolant to pump 36. The main valve is installed in the thermoelement glass, in which a rubber insert 39 is rolled. In the rubber insert there is a polished steel piston 47, mounted on a stationary holder. Between walls and a rubber insert contain a heat-sensitive solid filler. The main valve 41 is pressed by a spring to the seat. Two stands are attached to the valve, on which a bypass valve 42 is installed, pressed by a spring. The thermostat, depending on the temperature of the coolant, automatically turns on or off the radiator of the cooling system and bypasses the liquid through the radiator or bypassing it. On a cold engine, when the coolant temperature is below 80 C, the main valve is closed and the bypass valve is open. In this case, the liquid circulates through hose 5 through bypass valve 42 to pump 36, bypassing the radiator (in a small circle). This ensures quick warm-up of the engine. If the fluid temperature rises above 94 C, the thermostat's heat-sensitive filler expands, compresses the rubber insert 39 and pushes out the piston 47, moving the main valve 41 until it is completely open. The bypass valve 42 closes completely. In this case, the liquid circulates in a large circle: from the cooling jacket through hose 7 to the radiator and then through hose 34 through the main valve it enters the pump, which is again sent to the cooling jacket. Within temperatures of 80-94 C, the thermostat valves are in intermediate positions, and the coolant circulates in small and large circles. The opening value of the main valve ensures gradual mixing of liquid cooled in the radiator, thereby achieving the best thermal operating conditions of the engine. The temperature at which the main thermostat valve begins to open should be in the range of 77-86 C, the valve stroke should be at least 6 mm. The start of opening of the main valve is checked in a tank of water. The initial water temperature should be 73-75UC. The water temperature is gradually increased by 1 C per minute. The starting temperature of the valve opening is taken to be the temperature at which the stroke of the main valve is 0.1 mm. The simplest test of the thermostat operation can be done by touch directly on the car. If the thermostat is working properly, after starting a cold engine, the lower radiator tank begins to heat up when the arrow of the liquid temperature indicator on the instrument panel is approximately 3-4 mm from the red zone of the scale, which corresponds to a coolant temperature of 80-95 C.

The VAZ 2104 with rear-wheel drive and a station wagon body was produced from 1983 to 2012. The model was constantly improved: electrical equipment was changed, a fuel injection system, a five-speed gearbox and semi-sports front seats appeared. The VAZ 21043 modification was supplemented with a system for cleaning and heating the rear door window. Information on the diagrams is intended for self-repair of cars. Electrical circuits are divided into several blocks for ease of viewing via a computer or phone; there are also files in the form of a single picture with a description of each element - for printing on a printer.

VAZ-2104 diagram (old version)

block headlights;
— side direction indicators;
- accumulator battery;
— starter activation relay;
— carburetor electro-pneumatic valve;
— carburetor microswitch;
— generator 37.3701;
— gearmotors for headlight cleaners;
— electric motor of the engine cooling system fan*;
— fan motor activation sensor*;
— sound signals;
— ignition distributor;
- spark plug;
— starter;
— coolant temperature indicator sensor;
— engine compartment lamp;
— oil pressure warning lamp sensor;
- ignition coil;
— brake fluid level sensor;
— gear motor for windshield wiper;
— carburetor electro-pneumatic valve control unit;
— electric motor of the headlight washer pump;
— electric motor of the windshield washer pump;
— brake light switch;
— windshield wiper relay;
— instrument lighting regulator;
— relay-breaker for alarm and direction indicators;
— reverse light switch;
— plug socket for a portable lamp*;
- cigarette lighter;
— glove box lighting lamp;
— mounting block;
— lamp switches on the front door pillars;
— lamp switches on the rear door pillars;
- lampshades;
— parking brake warning lamp switch;
— switch for the carburetor air damper warning lamp;
— tailgate glass cleaner and washer switch;
- hazard warning switch;
— three-lever switch;
— ignition switch;
— ignition relay;
— external lighting switch;
— rear fog light switch;
— fog light circuit fuse;
— oil pressure warning lamp;
— instrument cluster;
— fuel reserve warning lamp;
— fuel level indicator;
— courtesy light for the rear part of the cabin;
— battery charge indicator lamp;
— coolant temperature gauge;
- carburetor air damper warning lamp;
— parking brake warning lamp**;
— block of warning lamps;
— rear fog light indicator lamp;
— control lamp for heated rear door glass;
— brake fluid level warning lamp;
- voltmeter;
— speedometer 2104;
— control lamp for external lighting;
— turn signal indicator lamp;
— high beam warning lamp;
— heater fan switch;
— heated tailgate glass switch with backlight;
— heater fan electric motor;
— additional resistor for the heater electric motor;
— electric motor of the tailgate glass washer pump;
— rear lights;
— gearmotor for tailgate glass wiper;
— pads for connecting to the rear glass heating element;
— license plate lights;
— sensor for level indicator and fuel reserve.

A— headlight units, headlight and tailgate glass cleaners, windshield wiper relay-breaker, carburetor electro-pneumatic valve control unit; b— mounting block and three-lever switch; V— rear lights (pin numbering in order from top to bottom); G— relay-breaker for hazard warning lights and direction indicators.

Electrical diagram of VAZ 2104

Scheme of VAZ-2104, for cars of early years of production. It is distinguished from the standard circuit by the G-222 generator, 10-pin hazard warning switch, 5-pin relay for direction indicators and hazard warning lights, top dead center sensor of the 1st cylinder, diagnostic block, rear window heating indicator lamp directly in the switch , the absence of a carburetor choke warning lamp, a two-position exterior lighting switch and a three-position steering column light switch.

1 — headlights;

3 - battery;
4 — battery charge warning lamp relay;

6 — top dead center sensor of the 1st cylinder;
7 — carburetor microswitch;
8 — generator G-222;
9 — gearmotors for headlight cleaners*;
10 — electric motor of the engine cooling system fan*;
11 — fan motor activation sensor*;
12 — sound signals;
13 — ignition distributor;
14 — spark plugs;
15 - starter;
16 — coolant temperature indicator sensor;
17 — engine compartment lamp;
18 — oil pressure warning lamp sensor;
19 — ignition coil;
20 — brake fluid level sensor;
21 — windshield wiper gearmotor;
22 — carburetor electro-pneumatic valve control unit;
23 — electric motor of the headlight washer pump*;
24 — electric motor of the windshield washer pump;
25 — diagnostic block;
26 — brake light switch;
27 — windshield wiper relay;
28 — relay-interrupter for alarm and direction indicators;
29 — reverse light switch;
30 — plug socket for a portable lamp;
31 — cigarette lighter;
32 — glove box lighting lamp;
33 — mounting block (a jumper is installed instead of a short-circuit relay);
34 — lamp switches on the front door pillars;
35 — lamp switches on the rear door pillars;
36 — lampshades of VAZ 2104;
37 — parking brake warning lamp switch;
38 — rear window cleaner and washer switch*;

41 — ignition switch;
42 — instrument lighting switch;
43 — external lighting switch;
44 — rear fog light switch;
45 — oil pressure warning lamp;
46 — instrument cluster;
47 — fuel reserve warning lamp;
48 — fuel level indicator;
49 — courtesy lamp for the rear part of the cabin;
50 — battery charge indicator lamp;
51 — coolant temperature indicator;
52 — relay-interrupter for the parking brake warning lamp;
53 — control lamp block;
54 — brake fluid level warning lamp;
55 — rear fog light indicator lamp;
56 — parking brake warning lamp;
57 - voltmeter;
58 — speedometer;
59 — control lamp for external lighting;
60 — turn signal indicator lamp;
61 — control lamp for high beam headlights;
62 — heater fan switch;
63 — rear window heating switch with control lamp*;
64 — heater fan electric motor;
65 — additional resistor of the heater electric motor;
66 — electric motor of the rear window washer pump;
67 — rear lights;
68 — rear window wiper gearmotor*;
69 — pads for connecting to the rear window heating element;
70 — license plate lights;
71 — sensor for level indicator and fuel reserve.

Electrical diagram - full view:

Scheme of VAZ-21043 and VAZ-21047 carburetor

1 — headlights;
2 — side direction indicators;
3 - battery;
4 — starter activation relay;
5 — carburetor electro-pneumatic valve;
6 — carburetor microswitch;
7 - generator 37.3701;
8 — gearmotors for headlight cleaners*;
9 — electric motor of the engine cooling system fan;
10 — fan motor activation sensor;
11 — sound signals;
12 — ignition distributor;
13 — spark plugs;
14 — VAZ 21047 starter;
15 — coolant temperature indicator sensor;
16 — engine compartment lamp;
17 — low oil pressure indicator sensor;
18 — ignition coil;
19 — low brake fluid level indicator sensor;
20 — windshield wiper gearmotor;
21 — carburetor electro-pneumatic valve control unit;
22 — electric motor of the headlight washer pump*;
23 — electric motor of the windshield washer pump;
24 — reverse light switch;
25 — brake signal switch;
26 — hazard warning and direction indicator relay;
27 — windshield wiper relay;
28 — mounting block;
29 — lamp switches on the front door pillars;
30 — lamp switches on the rear door pillars;
31 — diode for checking the serviceability of the warning lamp for insufficient brake fluid level;
32 — lampshades;
33 — parking brake warning switch;
34 — indicator lamp for insufficient brake fluid level;
35 — signaling unit;
36 — plug socket for a portable lamp**;
37 — glove box lighting lamp;
38 — tailgate glass cleaner and washer switch;
39 — alarm switch;
40 — three-lever switch;
41 — ignition switch;
42 — ignition relay;
43—econometer;
44 — instrument cluster; 45 — carburetor air damper closed indicator switch;
46 — battery charge indicator lamp;
47 — indicator lamp for closing the carburetor air damper;
48 — indicator lamp for turning on the direction indicators;
49 — speedometer;
50 — fuel reserve indicator lamp;
51 — fuel level indicator;
52 — instrument lighting regulator;
53 — clock;
54 — cigarette lighter;
55 - fog light circuit fuse;
56 — heater fan electric motor;
57 — additional resistor of the heater electric motor;
58 — electric motor of the tailgate glass washer pump;
59 — rear fog light switch with on indicator;
60 — heater fan switch;
61 — switch for heating the glass of the tailgate with a switch-on indicator;
62-external lighting switch;
63 - voltmeter;
64-lamp indicator for turning on external lighting;
65-lamp for high beam headlights;
66 — low oil pressure indicator lamp;
67 — parking brake indicator lamp;
68 — tachometer;
69 — coolant temperature indicator;
70 — rear lights;
71 — pads for connecting to the heating element of the rear door glass;
72 — sensor for level indicator and fuel reserve;
73 — courtesy lamp for the rear part of the cabin;
74 — license plate lights;
75 — gear motor for tailgate glass cleaner.

Electrical diagram - full view:

Scheme for VAZ-2104 injector

1 – electric motor of the engine cooling system fan;
2 – mounting block;
3 – idle speed regulator;
4 – electronic control unit;
5 – octane potentiometer;
6 – spark plugs;
7 – ignition module;
8 – crankshaft position sensor;
9 – electric fuel pump with fuel level sensor;
10 – tachometer;
11 – control lamp “CHECK ENGINE”;
12 – car ignition relay;
13 – speed sensor;
14 – diagnostic block;
15 – nozzle;
16 – adsorber purge valve;
17, 18, 19 – injection system fuses;
20 – ignition relay for the injection system;
21 – relay for turning on the electric fuel pump;
22 – intake pipe electric heater relay;
23 – electric heater of the intake pipe;
24 – intake pipe heater fuse;
25 – oxygen concentration sensor;
26 – coolant temperature sensor;
27 – throttle position sensor;
28 – air temperature sensor;
29 – absolute pressure sensor;

A – to the “plus” terminal of the battery;
B – to terminal “15” of the ignition switch;
P4 – relay for turning on the fan motor.

Wire connections in the instrument cluster

Brake system VAZ 2104

Brake fluid level sensor built into the expansion tank cap;
Electronic mounting block in the engine compartment with terminal “A” to the generator;
Ignition relay with negative terminal to ground;
Ignition switch on the steering column;
Indicator lamp on the instrument panel indicating low brake fluid level;
Indicator lamp for activated parking brake.

Engine Fan Circuits

Scheme for switching on headlights and fog lights

1 - block headlights; 2 - mounting block 2104; 3 - headlight switch in a three-lever switch; 4 - external lighting switch; 5 - rear fog light switch; 6 - rear lights; 7 - rear fog light circuit fuse; 8 - fog light indicator lamp, located in the indicator lamp block; 9 - indicator lamp for high beam headlights, located in the speedometer; 10 - ignition switch; P5 - headlight high beam relay; P6 - low beam headlight relay; A - view of the headlight plug connector: 1 - low beam plug; 2 - high beam plug; 3 - ground plug; 4 - side light plug; B - to terminal 30 of the generator; B - terminals of the rear light printed circuit board (numbering of terminals from the edge of the board): 1 - to ground; 2 - to the brake light lamp; 3 - to the side light lamp; 4 - to the fog light lamp; 5 - to the reversing light lamp; 6 - to the turn signal lamp.

Rear electrical equipment

Fuse and relay block VAZ-2104

On newer “sevens” a block with 17 fuses and 6 relays is installed. VAZ 2107 fuses on the “new” unit protect the following electrical circuits and devices:

Reversing lamps, heater fan, rear window defroster warning lamp and relay, rear wiper motor and rear washer pump.
Electric motor for front wipers.
Reserve socket.
Reserve socket.
Power supply for heated rear window.
Clock, cigarette lighter, power socket “carrying”.
Signal and radiator fan.
Turn signal lamps in emergency mode.
“Fog lights” and a relay that regulates the voltage of the on-board network.
Instrument panel lamps.
Brake light bulbs.
Right high beam headlight.
Left high beam headlight, high beam warning lamp.
Side lights (rear right, front left), license plate and engine compartment lighting.
Side lights (rear left, front right), glove compartment and cigarette lighter lamps.
Low beam (right lamp).
Low beam (left lamp).

The block relays perform the following functions:

Heated rear window relay.
Headlight cleaner and washer relay.
Signal relay.
Cooling system electric fan relay.
High beam relay.
Low beam relay.

Car modifications

VAZ-2104. The basic version of the station wagon, with a carburetor engine from the VAZ-2105, 1.3 liters and 64 horsepower. Equipped with a 4-speed gearbox.

VAZ-21041. A prototype of a station wagon, it was equipped with a carburetor engine from a VAZ-2101, with a volume of 1.2 liters and a power of 62 hp. Just like the base model, it was equipped with a 4-speed manual transmission.

VAZ-21042. Export version, the steering wheel was located on the right. The car also received a carburetor engine from the VAZ-2103, with a volume of 1.5 liters and a power of 72 hp.

VAZ-21043. The car was equipped with electrics and interior from a VAZ-2107, some copies had a VAZ-2106 interior. The carburetor engine was borrowed from the VAZ-2103. The gearbox was either 4 or 5 speed.

VAZ-21044. An export model, equipped with a 1.7-liter VAZ-2107 engine with mono-injection, as well as a 5-speed gearbox.

VAZ-21045. The export version with a 1.8-liter engine did not enter mass production.

VAZ-21045D. It was produced in small series since 1999, equipped with a VAZ-341 diesel engine with a volume of 1.52 liters and a power of 50 horsepower. The gearbox is 5-speed.

VAZ-21047. A prototype with an engine starting from a penny. An improved version of the Four, it was equipped with a VAZ-2107 interior and a VAZ-2103 carburetor engine with a volume of 1.5 liters and a power of 72 hp. The gearbox was 5-speed. On export versions, the radiator grille was installed from the VAZ-2107.

VAZ-21048. Diesel station wagon, with a 1.77-liter VAZ-343 engine. The gearbox is 5-speed.

VAZ-21041i. A car equipped with a VAZ-21067 injection engine. volume 1.6 liters. The gearbox is 5-speed. The electrical equipment and interior are from a VAZ-2107 car, and the front seats are from the Izhevsk hatchback IZH-2126.

VAZ-21041 VF. The interior, electrics and front seats are the same as the previous modification; the radiator grille is also borrowed from the VAZ-2107. It was equipped with a 1.5 liter injection engine from the VAZ-2103 and a 5-speed manual transmission.

Carburetor engine cooling system parts: 1
- heater radiator; 2 - coolant drain hose from the heater radiator; 3 - coolant supply hose to the heater tap; 4 - coolant drain pipe from the cylinder head; 5 - bypass hose; 6 - expansion tank; 7 - connecting hose of the expansion tank; 8 - coolant supply hose to the radiator; 9 - radiator cap; 10 - electric radiator fan; 11 - radiator of the cooling system; 12 - electric fan activation sensor; 13 - coolant drain hose from the radiator; 14 - coolant pump; 15 - coolant supply hose to the pump; 16 - thermostat; 17 - coolant temperature indicator sensor; 18 - coolant drain hose from the inlet pipeline; 19 - heater tap; 20 - coolant drain pipe from the heater radiator

The cooling system maintains optimal engine thermal conditions by regulated heat removal from the hottest parts. The engine cooling system is liquid, sealed type, with forced circulation of coolant and an expansion tank.

Connected to the cooling system interior heater radiator car. The heated coolant from the cylinder head flows through a hose through an open tap into the heater radiator, and then (through the fluid outlet pipe) into the coolant pump.

The coolant pump is centrifugal and driven from the crankshaft pulley by a V-belt drive. The pump consists of a body and cover made of aluminum alloy. The cover is secured with nuts to four studs screwed into the pump body. A sealing gasket is installed between the body and the cover. The pump shaft rotates in a double-row sealed bearing. A pump drive pulley flange is pressed onto the front end of the roller, and a cast iron or plastic impeller is pressed onto the rear end.

The radiator is vertical, tubular-plate, with two plastic tanks and an aluminum core. The radiator is mounted on two rubber pads and secured to the body with two bolts. The radiator filler neck is sealed with a plug and connected with a hose to expansion tank. The radiator cap has an outlet (steam) valve, pressed by a spring to the seat of the filler neck, and an inlet valve through which the radiator is connected to the expansion tank. The inlet valve is not pressed against the seat and has a gap of 0.5-1.1 mm, which ensures the inlet and outlet of coolant into the expansion tank during heating or cooling. If the temperature suddenly increases or the liquid boils, the inlet valve does not have time to release liquid into the expansion tank and closes, disconnecting the system from the expansion tank. When, due to further heating of the liquid, the pressure increases to 50 kPa, the outlet valve opens and part of the liquid begins to flow into the expansion tank. The expansion tank is closed with a plug with a rubber valve that maintains pressure in the tank close to atmospheric pressure.

The electric fan is installed behind the radiator. To reduce noise during operation, the fan impeller blades have a variable radius installation angle and pitch. The electric fan of the carburetor engine is turned on by a sensor screwed into the lower part of the right radiator tank. In cars of early production with constant forced ventilation, a fan switch sensor and an electric fan were not installed. The fan impeller was attached to the coolant pump pulley and rotated constantly while the engine was running. On an injection engine, the electric fan is controlled by ECU commands (via a relay). The input data for these commands is the signal from the coolant temperature sensor installed in the outlet pipe of the cooling system.

The cooling system thermostat serves to maintain the required thermal operating conditions of the engine and accelerate its warm-up. When the coolant temperature is below 80°C, the main thermostat valve is closed and the bypass valve is open. The fluid circulates from the cylinder block cooling jacket through the thermostat bypass valve to the pump, which again supplies fluid to the cooling jacket, bypassing the radiator (small circle). This ensures quick warm-up of the engine. The temperature at which the main thermostat valve begins to open should be in the range of 80.6-81.5°C. The full stroke of the main valve must be at least 6 mm. When the liquid is heated above 94°C, the main thermostat valve opens completely and the bypass valve closes. The liquid comes from the cooling jacket through the supply hose to the radiator. From the radiator, the liquid passes through the outlet hose through the main thermostat valve to the pump, which again supplies liquid to the cooling jacket (large circle). In the temperature range of 80-94°C, the thermostat valves are in an intermediate position and the liquid circulates in both small and large circles. Regardless of the position of the thermostat valves, when the heater valve is open, fluid always circulates through the heater core. In addition, the fluid constantly circulates through the intake manifold heating unit or the throttle body (on an injection engine).

Injection engine cooling system parts
: 1 - heater radiator; 2 - coolant drain hose from the heater radiator; 3 - coolant supply hose to the heater tap; 4 - coolant drain hose from the throttle body heating unit; 5 - coolant temperature sensor (control system); 6 - coolant supply hose to the throttle body heating unit; 7 - expansion tank; 8 - coolant supply hose to the radiator; 9 - connecting hose of the expansion tank; 10 - radiator cap; 11 - radiator of the cooling system; 12 - electric radiator fan; 13 - coolant drain hose from the radiator; 14 - coolant pump; 15 - coolant supply hose to the pump; 16 - thermostat; 17 - bypass hose; 18 - coolant temperature indicator sensor; 19 - coolant drain pipe from the cylinder head; 20 - heater tap; 21 - coolant drain pipe from the heater radiator

All cars of the “Classic” family from AvtoVAZ were equipped with an interior ventilation and heating system. In many ways, they were similar in design and simple, since they did not use modern air conditioners. And although it is impossible to wait for coolness in the “Classics” cabin in the summer, the heating system will not allow you to freeze in winter.

The heating system of the VAZ 2104, like the other models of the family, was derived from the liquid cooling system of the power plant. To make it clear, this system includes two radiators, which remove heat from the coolant passing through them.

But one of the radiators is the main one; it regulates the temperature of the liquid, so heat is removed from it into the environment so that heat exchange is carried out efficiently. It is installed in front of the car, under the radiator grille.

The second radiator provides interior heating. It also carries out heat exchange with heat being released to the air, but this air is supplied to the cabin, and this ensures its heating.

But this radiator is small in size, so to effectively heat the interior, an entire system is used to ensure forced air supply to the radiator, removal of already heated air to a certain area of the cabin, while it is possible to shut off the supply of heated liquid to the radiator of the VAZ-2104 stove. After shutting down, the system can continue to operate, providing cold air into the cabin - which is provided by the cabin ventilation system in the summer.

Heating and ventilation system design

For clarity, a diagram of the VAZ-2104 stove is provided

So, under the position 1 there is a resistor for changing the fan speed. The base of the stove consists of a fan housing 2 and blower fan guide 3 . They are connected to the upper part of the body with brackets 4 . The upper part of the case is the radiator shroud 5 . An air intake hatch is installed on top of it 6 .

There is a radiator inside the top part 8 , and to ensure a tight fit, a foam pad is used 7 . This radiator is connected to the cooling system via metal pipes 9 . A valve 10 for supplying liquid to the radiator is installed on the incoming pipe.

The stove fan consists of an impeller 11 and electric motor 12 . The fan is secured to the housing using a bracket 13 , and to prevent its vibration, it is pressed with a pillow 14 .

On the lower part of the body there are dampers for supplying warm air to the front doors 15 , as well as a cover for air supply to the foot area 16 .

But this is only the design of the stove; in order for the VAZ 2104 interior to be heated properly, additional mechanisms are attached to it.

The following pictures show the remaining elements of the system

Design of the heating system VAZ 2104

Heating system side view

Under the designations 1 And 2 showing left and right air ducts with left 4 and right 5 nozzles. Position 3 indicates the windshield air duct. Control Panel - 6 , with crane control handles 9 , control of the inflow cover 10 and control of the heating of the side and windshields 11 . Under position 12 The air distribution cover lever is located.

Next come the elements of the stove itself: 13 – fan housing with impeller 14 and electric motor 15 , windshield flap 16 , fan speed control resistor 17 , fan housing guide 21 , liquid supply control valve 22 , radiator housing 23 , radiator 25 with gasket 24 , air supply cover fastening elements 26 .

Position 18 – control rod for the side heating flap, 19 – heated side window flap, 27 – heater draft, 28 – air intake grille, 29 – car hood, 30 – air supply box, 31 - windshield.

Heating scheme

Air flow diagram of the VAZ-2104 heating system

Cold air is supplied into the heating system through the air intake grille 28 installed near the windshield from outside the car. Further heating of the VAZ-2104 can be carried out in three directions, which are selected by the control system:

1 – heated windshield, this direction is indicated in red. With this scheme, air enters through the hatch 7 into the air supply box 30 for cleaning from dust and water droplets. Then it moves through the radiator 25 , where heat is removed from the coolant, as well as the fan housing 13 , from where it enters the windshield heating duct 3 .

2 – heated side windows at the front, this direction is indicated in blue. Here the air also enters through the hatch into the box, then into the radiator casing 23 , and then enters the left and right air ducts 1 And 2 .

3 – heating of feet, this direction has a green designation. Air enters the cabin, as in other directions, but after the radiator casing it enters the internal ventilation duct 8 .

System management

In the VAZ-2104, the interior heating is controlled by the control panel handles, each of which ensures the closing and opening of one or another element.

Yes, the top handle 9 ensures opening and closing of the radiator valve 22 . It regulates the amount of liquid that will enter the radiator.

Middle handle 10 The air supply hatch 7 is opened and closed, which regulates the amount of fresh air supplied from outside the car.

Lower handle 11 regulates the position of the damper 16, which distributes the air flow through the air ducts.

There is one feature of air flow distribution control. When the damper position 16 In order to blow the windshield, the heated flaps of the side windows are completely closed. Conversely, when the air flow is blocked by the flap on the windshield, the air is directed only to the side windows.

This phenomenon is due to the fact that the windshield damper lever is connected to the side air duct damper lever. Therefore, to simultaneously heat the windshield and side windows, the damper control handle must be placed in the middle position.

Heating of the VAZ-2104 is carried out in 4 ways:

Heated windshield (Middle and lower control panel handles are moved to the right all the way);
Heated side windows (the middle handle is moved to the right, and the bottom handle is moved to the left all the way);
Heating of feet (upper handle – to the right all the way, air distribution cover of the heater housing is lowered down);
Supply of hot air from outside through lowered windows (sounds like a joke, but this is indicated in the technical documentation for the car);

This car is also equipped with exhaust ventilation to remove air from the passenger compartment. Unfortunately, there is no diagram of this ventilation specifically for the VAZ-2104, but it is identical to the VAZ-2105 model, which is presented below:

So, 1 - this is a car heating system, 2 – decorative grille with a rubber valve hidden underneath it 3 , through which air can escape when the windows are closed. The same valve prevents dust and moisture from entering the interior.

Correct control of the heating and ventilation system of the VAZ-2104

Correct control depends on the weather outside. In summer, when it is hot and there is no need to supply hot liquid to the radiator:

The lower handle of the system control panel is moved to the right all the way to open the air supply cover and supply fresh air to the cabin;
Air flow distribution is carried out by the middle handle;
To ensure a greater flow of fresh air, you can turn on the fan;

When it's cold outside:

Move the top handle all the way to the right to ensure the supply of hot liquid to the heater radiator;
Turn the nozzles of the side air ducts so that warm air flows onto the side windows in the area where the side mirrors are located;
To warm your feet, you need to lower the heater housing cover down;

If the windshield is covered with frost and needs to be defrosted quickly:

Move the top handle to the right all the way for maximum fluid supply to the heater radiator;
Middle handle - all the way to the left to shut off the air supply from outside the car;
The lower handle - to the right all the way to ensure the supply of warm air only to the windshield;

Video - stove VAZ 2104

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