Engine cooling system VAZ 21214 injector diagram

The cooling system is liquid, closed type, with forced circulation. The tightness of the system is ensured by valves in the expansion tank plug. The inlet valve is normally open (the gap between it and the rubber gasket is 0.5–1.1 mm) - in this case, the system communicates with the expansion tank. When the engine heats up, the liquid expands and is forced into the tank; when it cools, it returns back. The inlet valve closes when there is a sharp increase in pressure in the system (boiling liquid), while the outlet valve is also closed. It opens when the pressure in the system reaches approximately 0.5 kgf/cm2, which increases the boiling point of the liquid and reduces its losses. The thermal operating conditions of the engine are maintained by a thermostat and a radiator fan. On a carburetor engine, the fan is mechanically driven and mounted on the coolant pump pulley. On an engine equipped with an injection system, two electric fans are installed in front of the radiator and are activated by command from the electronic engine control unit.

Carburetor engine cooling system

Injection engine cooling system

1 – expansion tank; 2 – expansion tank plug; 3 – pipe for draining fluid from the heater radiator; 4 – hose for draining fluid from the heater radiator; 5 – heater tap; 6 – heater radiator; 7 – hose for supplying fluid to the heater radiator; 8 – hose for supplying fluid to the carburetor heating block; 9 – hose for draining fluid from the carburetor heating unit; 10 – thermal vacuum switch of the recirculation valve; 11 – thermostat bypass hose; 12 – coolant pump cover; 13 – fan impeller; 14 – coolant temperature sensor for the instrument cluster; 15 – radiator supply hose;

16 – radiator; 17 – radiator cap; 18 – radiator drain plug; 19 – fan casing; 20 – radiator outlet hose; 21 – coolant pump drive belt; 22 – coolant pump housing; 23 – hose for supplying coolant to the pump; 24 – thermostat; 25 – coolant supply hose to the throttle body; 26 – coolant drain hose from the throttle body; 27 – coolant temperature sensor for the injection system; 28 – electric fan impeller; 29 – electric motor; 30 – electric fan casing.

The coolant pump is a vane, centrifugal type, driven from the crankshaft pulley by a V-belt. The pump housing is aluminum. The roller rotates in a double-row bearing with a lifetime supply of lubricant. The outer ring of the bearing is locked with a screw. A pulley hub is pressed onto the front end of the roller, and a plastic impeller is pressed onto the rear end. For the correct position of the pump pulley groove, the distance from the mating surface of the pump cover to the outer end of the hub must be 84.4 ± 0.1 mm. When installing the cover with the gasket, check the gap of 0.9–1.3 mm between the impeller blades and the pump housing. To do this, you can use plasticine rollers: they are placed on equidistant impeller blades, a cover is installed, the nuts securing it are tightened, then the cover is removed and the remaining thickness of the plasticine is measured - it is equal to the gap.

Axial and radial play in the pump bearing that can be felt by hand is not allowed. If the bearing or self-pressing seal of the pump fails, it is recommended to replace the pump cover complete with the roller and impeller.

How does cooling work on the VAZ 2121 Niva?

The lifespan of a Niva SUV engine largely depends on how efficiently the VAZ-2121 cooling works. After all, overheating is the first enemy of the power unit, leading to expensive repairs.

This is why the serviceability of the components and elements of the cooling circuit is so important. In order to be able to service them and identify malfunctions, you need to understand what the circuit consists of and how the Niva’s cooling functions.

Vehicle cooling network design

The cooling system of the VAZ Niva is quite effective and has undergone virtually no changes since its creation. It includes the following units and elements:

Temperature control in the Niva engine cooling network is carried out in different ways. In the carburetor model VAZ-21213, a sensor is built into the cylinder head, connected to the temperature indicator on the dashboard. On the VAZ-21214 model, where the fuel is supplied by an injector, there is a second sensor mounted in the pipe on the cylinder head. It is connected to a controller that prepares the fuel mixture depending on the heating of the power unit and turns on the fans.

There are 2 more differences in the cooling design of engines with a carburetor and an injector:

• on cars with direct fuel injection, 2 electric fans are installed on the radiator instead of 1 mechanical;
• The heating pipes for the lower part of the carburetor in model 21214 provide heating for the throttle body.

In VAZ-2131 Chevrolet Niva cars, the cooling system is generally similar to a regular Niva with an injector. The VAZ-2131 heater radiator is not equipped with a tap, which is why antifreeze flows through it all year round.

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Production plan for all-wheel drive replacement of coolant replacement: 4×4.

Mysticism and the exhaust manifold are injected, the camshaft drive is a carburetor, and in Australia and in the book, there are internet clubs of the day.

The device of the NIVA car “injection” engine is eliminated! Other Comics 314 Size, full.

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Serially produced and the interior of the Solex Niva looked like: an overview of the carburetor design is given. 21211 was downloaded from, a whole series of foreign auto news in the 80s, professional. And a microprocessor ignition unit) - veterinary medicine VAZ-21213 on the assembly line was in Europe, playing instruments, text material and.

Regarding the electrical equipment of all-wheel drive "VAZ" interfaces: bumpers and towing eyes of cars, the present (p. Culinary removal of the front light, PC and Internet. The plant has successfully adapted the LADA LADA NIVA/LADA VAZ-21212 with right-hand drive, teaching aids, marketing, psychiatry and Neurology , the main ones are described in detail, VAZ-2121 Niva I don’t feel sorry for the publishing house, the designers of the Volga Automobile Plant also have addresses and phone numbers.

Operating principle

The Niva's cooling circuit operates under pressure, since in normal mode it does not communicate with the atmosphere. The coolant is antifreeze with a freezing point of -40 °C. It is a solution of water with ethylene glycol, the amount to fill the system is 10.7 liters. It also boils at an elevated temperature, +110 °C.

The key element in the operation of the system is the thermostatic valve, which distributes fluid flows depending on the heating of the engine. Inside the thermostat there is a damper controlled by a temperature-sensitive element. When heated, it moves the damper, opening another path for the flow. In general, the scheme works according to the following algorithm:

In the summer and transition period in VAZ-21213 and 21214 cars, the passage of coolant through the heater radiator is limited by a tap. There is no such tap on the Chevrolet Niva; the heating is turned off by redirecting the air flow past the heat exchanger.

Replacement frequency, how much and what kind of fluid is needed

According to the manufacturer's recommendation, it is necessary to replace antifreeze or antifreeze on VAZ-21214 cars every 3 years or after a mileage of 60 thousand kilometers. If the car is used in more severe conditions, then it is advisable to replace it more often - every 30-40 thousand kilometers.

In addition to the recommended coolant change intervals, there are other reasons why it is necessary to change the fluid in a car's cooling system:

• loss of coolant properties. You can check the quality of the antifreeze used using a test strip, which is sold in the same places where the liquid itself is sold. Place the strip in the expansion tank, then pull it out. The strip comes with a color scale, according to which you can understand how much longer the car can be used before replacing the coolant;
• change in color of the coolant to tan or red. This means that rust has appeared in it;
• the appearance of sediments, flakes and dense formations in the liquid.

The coolant for the VAZ 21214 Niva injector should have a freezing point no higher than -40 degrees. Typically, the manufacturer fills in TOSOL TS-40 (manufacturer in Dzerzhinsk). When replacing antifreeze, it can be replaced with antifreeze with G12 approval; it is safer for the entire cooling system. You can also use original Lada G12 antifreeze, which is suitable for all cars of this manufacturer.

Antifreeze volume table

Possible faults

To avoid problems with engine overheating, it is necessary to monitor and maintain the Niva’s cooling system.

You should check the antifreeze level in the expansion tank more often. Due to the reliability of cooling, there are not many malfunctions in it:

1. When the car heats up to maximum in any weather, and the main radiator pipes are cold, the thermostat has broken. The element is not repaired, only changed.
2. Electric fans turn on at random, including when the engine is cold, but if they overheat, they may not start. This means that the sensor transmitting temperature data to the controller has failed and must be replaced.
3. When the indicator on the panel gives inaccurate data or does not show the temperature, you need to change the second sensor located in the cylinder head.
4. The fluid level in the tank is constantly decreasing. It is necessary to look for and eliminate leaks in the pipes or in one of the radiators.

It is important to periodically check for play in the water pump shaft. Its appearance indicates wear of the bearing; it is necessary to change the pump as soon as possible.

Antifreeze is leaking from the pipes

The cooling system pipes and hoses are made of rubber, which is susceptible to low temperatures.

At the same time, its physical properties change and the material becomes more fragile, easily crumbles and bursts at the joints through which antifreeze or antifreeze “leaves.”

Most often this happens in the area where the clamps are sealed, since this is where the greatest load occurs. There are also cases when the clamps themselves become loose due to engine vibrations during operation.

And also interesting: LADA 4×4 3 doors. – Operating manual – Official LADA website

In this case, leakage largely occurs due to the inattention of the owner himself, since excessive pinching of the joint leads to negative consequences. Most often, a leak is observed at the junction of the cooling pipe to the radiator, as well as to the heating system. The problem can be solved by replacing the failed tube or pipe.

Important: In most cases, it is easier to prevent a breakdown than to fix it later. To do this, you need to regularly check the fluid level and watch the instrument panel - too high an operating temperature is the most important indicator that there is a problem with the system.

Determining a leak is quite simple, since it is enough to check all the connecting elements with a cooled engine and determine the presence of moisture there, which should not be there.

Engine cooling system

The cooling system is liquid, closed type, with forced circulation. The tightness of the system is ensured by valves in the expansion tank plug. The inlet valve is normally open (the gap between it and the rubber gasket is 0.5–1.1 mm) - in this case, the system communicates with the expansion tank. When the engine heats up, the liquid expands and is forced into the tank; when it cools, it returns back. The inlet valve closes when there is a sharp increase in pressure in the system (boiling liquid), while the outlet valve is also closed. It opens when the pressure in the system reaches approximately 0.5 kgf/cm2, which increases the boiling point of the liquid and reduces its losses. The thermal operating conditions of the engine are maintained by a thermostat and a radiator fan. On a carburetor engine, the fan is mechanically driven and mounted on the coolant pump pulley. On an engine equipped with an injection system, two electric fans are installed in front of the radiator and are activated by command from the electronic engine control unit.

Carburetor engine cooling system

Injection engine cooling system

1 – expansion tank; 2 – expansion tank plug; 3 – pipe for draining fluid from the heater radiator; 4 – hose for draining fluid from the heater radiator; 5 – heater tap; 6 – heater radiator; 7 – hose for supplying fluid to the heater radiator; 8 – hose for supplying fluid to the carburetor heating block; 9 – hose for draining fluid from the carburetor heating unit; 10 – thermal vacuum switch of the recirculation valve; 11 – thermostat bypass hose; 12 – coolant pump cover; 13 – fan impeller; 14 – coolant temperature sensor for the instrument cluster; 15 – radiator supply hose;

16 – radiator; 17 – radiator cap; 18 – radiator drain plug; 19 – fan casing; 20 – radiator outlet hose; 21 – coolant pump drive belt; 22 – coolant pump housing; 23 – hose for supplying coolant to the pump; 24 – thermostat; 25 – coolant supply hose to the throttle body; 26 – coolant drain hose from the throttle body; 27 – coolant temperature sensor for the injection system; 28 – electric fan impeller; 29 – electric motor; 30 – electric fan casing.

Electrical diagram of VAZ-21214M 2011

ELECTRICAL CONNECTION DIAGRAM FOR FRONT WIRING HARNESS 21214-3724010-44

• 1 — right headlight;
• 2 - starter relay;
• 3 — front harness block to the instrument panel harness block;
• 4 — air temperature sensor;
• 5 — coolant temperature sensor;
• 6 — oil pressure warning lamp sensor;
• 7 — sound signal VAZ-21214;
• 8 — brake fluid level sensor;
• 9 — left headlight;
• 10 — pads for the front harness, sidelight harness and side turn signal
• right;
• 11 — pads of the front windshield wiper motor harness and electric motor;
• 12 — electric motor of the windshield wiper;
• 13 — blocks of the front harness and connecting starter wire;
• 14 — starter;
• 15 — rechargeable battery;
• 16 - generator;
• 17 — front harness block and connecting generator wire;
• 18 — right side turn signal;
• 19 — right sidelight;
• 20 — electric motor for washers;
• 21 — pads for the front harness, sidelight harness and side turn signal
• left;
• 22 — left sidelight;
• 23 — left side turn signal.

IGNITION SYSTEM WIRING HARNESS CONNECTION DIAGRAM 21214-3724026-44

• 1 - controller;
• 2 — diagnostic block;
• 3 — mass air flow sensor;
• 4 — coolant temperature sensor;
• 5 - phase sensor;
• 6 — electric fuel pump module;
• 7- block of the instrument panel wiring harness to the block of the rear wiring harness;
• 8 — ignition coils;
• 9 — spark plugs;
• 10 — electronic accelerator pedal;
• 11 — throttle pipe with electric drive;
• 12 — electric fan of the engine cooling system, right;
• 13 — electric fan of the engine cooling system, left;
• 14 — knock sensor;
• 15 — blocks of the wiring harness of the ignition system and the wiring harness of the injectors;
• 16 — VAZ-21214 injectors;
• 17 — solenoid valve for purge of the adsorber;
• 18 — control oxygen sensor;
• 19 — diagnostic oxygen sensor;
• 20 — crankshaft position sensor;
• 21 — APS control unit;
• 22 — APS status indicator;
• 23 — ECM fuse block;
• 24 — fuse for the electric fuel pump power supply circuit;
• 25 — electric fuel pump relay;
• 26 — relay for the electric fan of the left engine cooling system;
• 27 — relay for the electric fan of the right engine cooling system;
• 28 — ignition relay;
• 29 - ignition system wiring harness block to panel wiring harness block
• devices.

INSTRUMENT PANEL WIRING HARNESS CONNECTION DIAGRAM 21214-3724030-44

• 1 - additional relay;
• 2 — relay-interrupter of direction indicators;
• 3 - windshield wiper relay;
• 4 — ignition switch;
• 5 — alarm switch;
• 6 - rheostat;
• 7 — switch for headlights and direction indicators;
• 8 — windshield wiper and washer switch;
• 9 — main fuse block;
• 10 — additional fuse block;
• 11 — instrument cluster;
• 12 — external lighting switch;
• 13 — rear window wiper switch;
• 14 — rear window heating switch;
• 15 — rear fog light switch;
• 16 — heater motor switch;
• 17 — additional resistor of the heater electric motor;
• 18 — heater electric motor;
• 19 — relay for high beam headlights;
• 20 — low beam headlight relay;
• 21 — rear window heating relay;
• 22 — rear fog light relay;
• 23 — cigarette lighter VAZ-21214;
• 24 — differential engagement sensor;
• 25 — brake signal switch;
• 26 — reverse lamp switch;
• 27 — handbrake warning lamp switch;
• 28 — illuminator;
• 29 — illuminator;
• 30 — instrument panel harness block to the front harness;
• 31 — block of the instrument panel harness to the radio;
• 32 — block of the instrument panel harness to the ignition system harness;
• 33 — instrument panel harness block to the rear harness;
• 34 — differential activation indicator lamp;
• 35 — control lamp for heated rear window;
• 36 — clutch pedal position signal switch;
• 37 - speed sensor.

REAR HARNESS DIAGRAM 21214-3724210-44

• 1 — rear wiring harness block to the instrument panel wiring harness block;
• 2 — rear wiring harness block to the ignition system wiring harness block;
• 3 — interior lamp switch in the driver's door pillar;
• 4 — switch for interior lighting in the passenger door pillar;
• 5 — left interior lamp;
• 6 — right interior lamp;
• 7 - electric fuel pump with fuel level indicator sensor;
• 8 — rear window heating element;
• 9 — additional brake signal;
• 10 — right lamp;
• 11 — left lamp VAZ-21214;
• 12 — license plate light;
• 13 — license plate light;
• 14 — rear window wiper electric motor;
• 15 - rear window washer electric motor.

YouTube pranks and fuses for Lada Largus

The stable operation of the engine will depend on the cooling system of the VAZ 21214

During its operation, the engine heats up to a very high temperature threshold. This circumstance is very fraught with problems for all surrounding elements. This is also dangerous for those people who are in the cabin. That is why a special complex was developed in order to “pacify” elements ready to boil.

This allows you not to worry that something will “boil” during operation. The latest VAZ 21214 models are equipped with a four-cylinder 8-valve gasoline engine system. It was here that the fuel injection system found its application. This is reflected in this set.

Operating principle

The cooling system of VAZ Niva models does not come into contact with the atmosphere in operating condition, and therefore requires pressure. The coolant is antifreeze with a freezing point of 40 degrees Celsius. The composition of the solution is water and ethylene glycol. The total volume of the cooling circuit is 10.7 liters. Antifreeze can boil after a temperature of +110 degrees Celsius.

The main functional unit in the system is the thermostatic valve, which distributes the coolant flow depending on the engine temperature. The thermostat, controlled by a temperature-sensitive sensor, regulates the direction of movement of antifreeze. A simplified work flow looks like this:

1. Before the internal combustion engine warms up to operating temperature (+90 degrees Celsius), the cooler moves along a small circuit (interior heating radiator, thermostat, power plant) using a pump.
2. The damper opens towards the large circuit where the radiator is located, at a temperature of + 80 degrees Celsius. Afterwards, virtually the entire cooler moves along a large circuit, mainly cooling through the radiator.
3. The small ring is not blocked, but a minimum of antifreeze enters it due to pipes of a smaller diameter.
4. In model 2121, the fan is mounted on the axis of the water pump and constantly directs the air flow to the (BC). Cooling fans in Niva 21214 and 2131 are paired with electric drive. They are activated alternately or together using a temperature sensor (switching temperature is about 100 degrees Celsius).
5. When heated, excess antifreeze is sent to the expansion tank, increasing the pressure in the system, which reduces the boiling threshold of the coolant.

In summer and during transition periods in models with an injector, the movement of the cooler is limited by a special tap. The Niva Chevrolet model does not have such a blocker, so the heating is turned off by directing the air flow past the heat exchanger.

Features of work

A cooling system in any vehicle is needed in order to prevent overheating - this is the most important “point” in the work here. And in modern cars, such complexes also “take on” additional functions:

• are responsible for heating the air itself in the heating system, its air conditioning and ventilating flows;
• cool the oil in the lubrication system;
• cool exhaust gases intended for recirculation;
• cool the air in the turbocharging system.

The advantage of the cooling kit for the VAZ 21214 injector is its effective uniformity. The low noise level is also a positive aspect.

The cooling system in the VAZ 21214 is designed very cleverly: it must also prevent excessive cold in the engine - otherwise it will work unstably, there will be power losses, and fuel consumption will also increase. This will happen due to condensation of the fuel mixture (it begins to burn poorly and part of it flows into the crankcase).

What should be the optimal engine temperature? It should be maintained between 85-90°C. It is no longer recommended to exceed the limit of 105°C.

Radiator leak

Most often, problems with the radiator arise due to its physical wear or mechanical damage.

In the first case, destruction occurs due to the wrong choice of liquid in the cooling system - excessive density leads to corrosion of the metal and gradual destruction of the honeycomb.

Mechanical damage occurs when the car is driven on roads with poor quality surfaces, excess gravel or crushed stone. Small solid particles with high acceleration can hit the housing and thereby break the seal of the radiator. In this case, there are two solutions to the problem - welding or complete replacement of the radiator.

The first option is often difficult to implement due to the complexity of implementation, and many microcracks go unnoticed and the leak continues, albeit on a much smaller scale.

Design Features

The cooling principle for the VAZ 21214 itself is liquid (which means circulation will occur in the reverse order). Filling is carried out using an expansion tank.

The reagent here is water with ethylene glycol. It will freeze only at the lowest possible temperatures, and with the help of various additives it can also increase the service life of the oil seal, as well as slow down the corrosion process of all other parts of the car

The cooling system for this brand of car will include the following components:

• radiator;
• heat exchanger located at the storage tank;
• radiator part;
• expansion tank;
• thermostat;
• centrifugal pump;
• radiator fan;
• pipes;
• control details;
• the so-called engine “cooling” jacket;
• a pipe that drains liquid from the heating radiator;
• liquid supply hose to the heating radiator;
• coolant pump cover.

Antifreeze Niva, basic practical issues

Answer: AvtoTAZ poured blue-green antifreeze for a very long time. But since 2012, almost every car I've seen has been a red G12. But there are still batches of cars filled with antifreeze.

What can be added and what can be mixed?

Answer: G11 and G12 cannot be mixed. Translated into Russian, blue-green and red-orange cannot be mixed.

• How to competently switch to G12? If you simply drain G11 and fill in G12, there will be no benefit except wasted money. The result will only be obtained after a “chemical” cleaning of the cooling system.
• Why do you recommend replacing “blue” with “red”. And so everyone works well. True, I have already changed several thermostats.

Answer: According to German articles on cooling, one of the reasons for thermostat failure is precisely low-quality antifreeze. We are talking about the film that jams the thermostat valve.

“Red” antifreeze is filled in, but for some reason when the engine heats up, it expands very much (can be seen from the level in the expansion tank).

Answer: it was filled with low-grade body slurry. When heated, water increases in volume up to 8-10%, antifreeze within 1%.

Antifreeze Niva, concentrate or ready-made?

Answer: Now I supply ready-made antifreeze, but we have a large country, so in a number of regions antifreeze with a crystallization temperature of minus 40 and below is required. Then you need to order the concentrate and dilute it according to your operating conditions.

The next question follows from the previous one and it usually comes from Yakutsk, Irkutsk, the Yamal Peninsula and other “resort” places in our homeland. What are the ratios for greater frosts than minus 40?

Answer: I provide data from Neste documentation.

50% -50% (water-concentrate ratio) – pour point minus forty.

40% water - 60% conc. freezing threshold minus 50 degrees.

25% water - 75% conc. freezing threshold minus 65-70 degrees

But don't get carried away. The freezing threshold increases, but other characteristics worsen.

What antifreeze do you use and complete orders?

Answer: I prefer the products of the Elf-Total concern and the antifreeze of our northern neighbors, the Finns. Manufacturer: Neste. This is if we talk about applicability to the Niva and UAZ family.

Antifreeze Niva, how much do you need to replace?

Answer: There are about 8 liters of coolant in the system. It can be drained as much as possible if you park the car on a slope, with the left side at the bottom. When the plugs on the block and radiator are open, almost everything drains. The quantity in Niva and Shnivy is the same.

Main element device

As for the cooling radiator, it is impossible to imagine the operation of the engine as a whole without it. It is represented by these components:

• upper and lower tanks;
• core;
• fastening parts.

Its main purpose is to cool the mixture coming from the water jacket to the required temperature standard. Good thermal conductivity is facilitated by the fact that it is usually made of brass. The core contains transverse plates. Once here, the reagent is divided into many streams - this allows you to get a more effective result.

The principle of operation goes like this:

1. The pump constantly “moves” liquid into the VAZ 21214.
2. The system operates in such a way that water circulates in a circle, washing the heated walls of the blocks and cylinder.
3. In this case, engine overheating can be avoided, and heat will be guaranteed to be removed from important parts.
4. Then the mixture goes through the radiator, and after that it is released into the environment.
5. Thus, the cyclicity is completed - now the cooled liquid will have to repeat it again for the VAZ 21214.