Do-it-yourself vaz 21074 engine repair

In detail: do-it-yourself repair of a VAZ 21074 injector engine from a real master for the site my.housecope.com.

at the top of the support, put grease on the boot, if it can be easily removed (if not, then we don’t touch - you can break it, just go cleanly);
in the bottom, take in grease with a press-grease.

When you move, you get a rumble, by pressing on the grip, it will drop

How to unscrew candles? We tried all 3 sparkling keys. What other ways are there?

GUL-clutch release
Candle- normal set of heads

If life has pushed you with an injector 406 engine, then read this article. There are some descriptions of the advantages of this motor, whether it is worth installing HBO on a car with such a motor, what kind of malfunctions are met and the methods of their installation.

You will know: what types of supplies are in your car, where they are found, how to check their operation. And in the end you will receive a few tips on how to replace them.

A person is painfully aware of the car's strips. First of all, due to expenses for replacement. This article will tell you how you need to replace the pump for BAZ 2109. After reading it, you can do it really well, which saves money.

In order to save money, the owners often repair the VAZ 2107 engine with their own hands. The motor of this model has some features. Before repairing without a service station, you must familiarize yourself with the causes and methods of troubleshooting the VAZ 2107 engine.

Photo of the VAZ 2107 engine.

The VAZ 2107 "Classic" is equipped with a four-stroke inline engine with four cylinders. The engine, depending on the modification, can be made with a central mixing injection system (carburetor) or with a distributed injection system (injector). Depending on the modification, it can also develop from 68 to 74 horsepower.

Video (click to play).

Car engine maintenance must be carried out in accordance with the manufacturer's instructions, taking into account the operating conditions.

Lada 2107 is a rear wheel drive car. The connection of the engine with the variable gearbox is made in the longitudinal version. This design can make it difficult to completely dismantle the motor. Almost all of the interior engine compartment is used to house the engine, air filter and auxiliary systems. It also makes repairs difficult.

Dedicated car-tool.

The need to repair the motor can be caused by a number of reasons:

terms of Use;
planned wear of parts;
engine diagnostics;
unplanned breakdowns;
accidents and others.

The car was produced for about forty years. Due to the obsolescence of the design, there may be incompatibilities with a number of tools. In addition, full engine overhauls are carried out exclusively in private repair shops.

This increases the cost of the work so much that it may be easier to buy a new motor. If the breakdown is small and can be eliminated without complicated procedures, or it is possible to carry out partial overhaul, it is better to do everything yourself

The first thing you should pay attention to when there is a need for engine repair is the condition of the oil in the crankcase (color, turbidity and level). Engine oil in the engine lubrication system is the main indicator of the condition of the joints of engine parts.

Cloudy engine oil.

Clouding of the oil indicates the presence of running-in parts, blackening - about possible overheating or breakthrough of the flame from the combustion chamber into the crankcase. A drop in level may indicate leaks or frictional depletion in overtightened mates.

Checking the oil level is carried out on a cold engine when the vehicle is installed on a flat horizontal surface.

It is also necessary to check the level of antifreeze in the expansion tank. If the level drops, it could indicate overheating or a leak in the cooling system. If the level rises, then we can talk about problems with the thermostat - a device that, depending on the temperature of the coolant, regulates the speed of its movement in the cooling system.

Other malfunctions of the VAZ 2107 engine and their characteristic manifestations can be found in special literature, engine repair instructions.

Before proceeding with the overhaul of the VAZ 2107 engine, it is strongly recommended that you familiarize yourself with the special literature in order to better understand the procedures performed.

Upon completion of the repair, the car must be run-in to run-in all parts. Usually the break-in takes place in the first 5,000 kilometers.

Engine prepared for overhaul.

Before the actual disassembly, the oil must be drained from the engine. To do this, warm up the motor to approximately operating temperature and turn it off. If there is a ditch, then the car is driven onto it.

If it is not possible to enter the ditch, it is necessary to place the car on a flat surface.

Place a 10-liter container made of heat-resistant material under the oil drain hole. Unscrew the plug and drain the oil.

Then drain the antifreeze from the cooling system through the drain hole at the bottom of the engine cooling radiator.

IMPORTANT!
The oil can reach temperatures of about 100 degrees.
If you try to start the car when the oil and antifreeze are drained, the engine will completely fail.

When all working fluids are drained, unscrew all supports and disconnect the flywheel-to-transmission bolted connections. Using a winch, remove the motor from the bonnet and place it on a stand for repair.

Dismantling the engine does not require a special approach: simple unscrewing of the threaded connections.

Photo of the removed cylinder head.

Everything is removed: the cylinder head, electrical components, including the starter and generator, connecting rods, crankshaft, oil pump and so on. As a result, a separately disassembled cylinder block and a crankshaft should remain. Removing the head and all elements is a simple procedure.

It will be difficult when assembling gas distribution and other engine mechanisms, which require precise matching of the position of the working parts. Installing the head will require compliance with timing marks and other mechanisms.

Read also: Lg wd 10180 n DIY repair

The reason for such failures is clogging of the nozzles, even diagnostics are not needed.
Cleaning helps to restore the engine to its previous performance. If the problem persists after cleaning, it is worth checking the tubes and nozzles for damage or breakdowns. In such cases, it is better not to start the repair, but simply replace the damaged parts with new ones.

Sometimes it is impossible to independently determine where the damage is, and only then diagnostics in service centers will come in handy. A blockage can cause a rather serious breakdown of the VAZ 2107 injector, as well as rupture of channels. The pressure that builds up inside the system can easily render the most fragile parts unusable. Here, with your own hands, you will not be able to correct the situation, even if you have a complete diagram of the car at hand. There is only one conclusion - you need to pay a lot of time and attention to cleaning the injectors and perform it regularly.

To repair the fuel system with your own hands at a VAZ, you will need to remove the receiver.This is done in several stages:

First, the throttle controls are removed from the receiver, then the retaining clamp is loosened and the vacuum hose is disconnected.

The fuel pipe holder is being dismantled.

The throttle cable bracket is removed.

5 fastening nuts are twisted, the pressure regulation hose is disconnected. After that it will be possible to remove the receiver from the studs.

This is the only way to gain access to the fuel rail.Model 2107 and VAZ 21074 injector have common problems with the fuel system due to the injection type of fuel atomization. With your own hands, you can clean the channels, check for damage and replace parts if necessary.

VAZ 21074 has good technical characteristics. It is a rear wheel drive car, a 4-door sedan that can be loaded with up to 500 kg. The engine in this model is a four-cylinder, eight-valve, 1.6 liter. At the same time, the engine power is 73 hp. With. The maximum speed of the vehicle is 150 km / h.

In this model, there is already an independent front suspension, which makes it more stable on the road, the rear suspension has a rigid beam. The brake system is no different from other systems of VAZ carburetor models, the front brakes are disc brakes, while the rear ones are drum brakes.

An injection vehicle is equipped with a special computer module, which can be connected to make a complete diagnosis of the vehicle. This can be done at any specialized car service.The injection engine has proven itself very well. In the cold season, it starts up immediately, does not require a long warm-up, so you can start driving right away. At idle, the engine runs smoothly and quietly.

Fuel consumption is significantly less than that of the carburetor model. If the amount of fuel consumed has increased sharply, then the reasons for the high costs should be sought precisely in the injector and the computer module. If there is a program failure, the module is simply overwritten. The car of this model has several disadvantages. The exhaust catalyst is very low in it and can be easily damaged while driving on bad roads, and the cost of a new part is considerable.

It is very problematic to get to the necessary parts and sensors under the hood, since the engine in this model is old, and the body during assembly was not designed for the presence of an injector. In the carburetor model, all the elements under the hood are located much more conveniently. Another drawback in this car model is low noise insulation, which makes driving on the road not as comfortable as we would like.

The presence of indicator lamps on the instrument panel allows you to determine a breakdown in the car. It is the computer control unit that detects malfunctions and sends signals to the instrument panel. Many experts recommend installing a regular on-board computer, which will also show complete statistics on fuel consumption, more accurate data on battery voltage and engine tachometer.

Some on-board computers are more modern and can warn about the need to change the engine oil.

Correct and careful use of the VAZ 21074 injector allows you to drive it for a long time. This model is not whimsical to repair. The cost of parts for an injection car does not differ much from the cost of parts for carburetor models, since these machines are almost identical. Timely replacement of oil and filters, as well as periodic diagnostics will allow you to move around the city without any problems.

The VAZ 2107 car is popular not only in our country, but also in neighboring countries. This model is known for its ease of use and reliability. There is no doubt that the “seven” will soon become something like a classic of the domestic auto industry, regardless of the type of engine.

The injection engine for this model began to be installed in 2006. It was an economical 1.6 liter engine that met Euro-2 international environmental standards. Engine power was slightly reduced compared to carburetor engines and amounted to 50 horsepower, but the average fuel consumption rate decreased. In addition, the use of direct fuel injection made it possible to get rid of the problems typical for carburetor engines due to the stability of idling. The fuel mixture is optimally metered, which is facilitated by the operation of the electronic engine control unit, which reads the readings from special sensors.

Moreover, the wiring diagram of the VAZ 2107 injector was replenished with such details as a hydraulic tensioner and hydraulic valve lifters. With the help of these units, the engine operation became noticeably quieter. In addition, the valves are adjusted automatically, which was not possible with a carburetor engine. However, the injection system on a VAZ 2107 car also has a number of disadvantages, including expensive repairs and maintenance, an increased requirement for the quality of the fuel used and a reduced clearance, since the engine catalyst is installed too low.

The injector has obvious advantages over the carburetor system... First, fuel consumption is more optimal. Secondly, there is less emission of harmful substances into the atmosphere due to the correct dosage of fuel.But at the same time, the requirements for the quality of service of the injector on the VAZ 2107 have also increased. In particular, due to contamination of the injectors, the performance of the engine deteriorates, so it is necessary to monitor the condition of all injectors and valves. The first signs of malfunctioning injectors are loss of power, speed, dips when pressing the gas pedal and other signs.

If you notice that the engine consumes more fuel than necessary, while all the systems in the car are in good working order, then the only option for optimizing fuel consumption will be the procedure for chip tuning of the VAZ 2107 injector. Re-flashing the electronic control unit will allow you to get rid of increased fuel consumption, improve the speed idle and increase engine power. It is necessary to carry out the flashing on special equipment in the technical center. Experts will connect a special diagnostic module to the ECU and calibrate the parameters depending on what the diagnostics show.

Diagnostics and repair of the VAZ 2107 injector is carried out either independently, with a special device, or is done in a specialized service. This is due to the fact that the wiring diagram of the VAZ 2107 injector is quite complex, therefore, it is sometimes difficult to independently search for faults and repair the electronic system without special equipment. Compared to the carburetor version of the engine, the injector circuitry differs in several parameters, including the need for constant pressure in the power supply system, which is created by a special electric pump. In addition, the mixture of fuel and air is carried out directly in the cylinder, and fuel injection is electronically controlled.

The wiring diagram of an injection engine consists of many additional elements, including an idle speed sensor, a throttle position sensor, a fuel pump, an ignition module, etc.

In order to identify a malfunction and conduct an independent diagnosis in case of minor malfunctions in the operation of the electronic system, experts recommend studying how the electrical circuit looks like and the electrical equipment of the VAZ 2107 model injector works.

One of the most common problems on the VAZ 2107 injection model is misfire on the cylinders, which is due to a faulty ignition module. Some experts in this case recommend replacing the spark plugs, however, as practice shows, this will not help. The ignition module is an important adjustment mechanism, so it is best to purchase a new one. You can install it yourself, following specific instructions. For optimal operation of the injector, it is recommended to adjust the valves, this is necessary in order to distribute the valve timing. If the valve adjustment is carried out efficiently and systematically, the car engine will perform much better.

As a rule, the repair of an injector at the initial stage basically comes down to diagnosing electronic equipment and flushing the injectors with a special additive, this can be done by hand. In any case, it is better to carry out both diagnostics and repair of the VAZ 2107 injector by specialists, and as for cleaning, it can be done independently. But remember that cleaning the injectors does not always fundamentally affect the optimal fuel consumption, and the independent “brain reduction” of the ECU can aggravate the malfunction of the electronic systems responsible for the operation of the injector.

Do you still think that car diagnostics is difficult?

If you are reading these lines, then you have an interest in doing something yourself in the car and really savebecause you already know that:

STO lomat big money for simple computer diagnostics
To find out the error, you need to go to the specialists
Simple wrenches work in the services, but you can't find a good specialist

And of course you are tired of throwing money away, and there is no question of driving around the service station all the time, then you need a simple ELM327 AUTOSSCANER that connects to any car and through a regular smartphone you will always find a problem, pay off CHECK and save a lot.

We have tested this scanner ourselves on different machines. and it showed excellent results, now we recommend it to EVERYONE! So that you do not fall for the Chinese counterfeit, we publish here a link to the official website of the AutoScanner.

Overhaul of the engine, or the eyes are afraid, but the hands are doing.

Background.
It all started, as you know, with the purchase of a "new" car in 2009. Car VAZ 21053 1997 color "safari" code 215 (for those who do not know - light beige). After the purchase, I skated no more than a couple of thousand kilometers and soon the move refused to pull normally. I checked the candles - relatively clean, adjusted the valves - it did not help. Having procured a homemade compression meter, and measured the compression, I was unpleasantly surprised.

The compression was as follows:
1 — 8;
2 — 8;
3 — 4,5;
4 — 8.
Here it is a no brainer that only an autopsy will save the patient. Like many brothers in misfortune, he began by calling the services, and, having learned the cost of the repair (15-17 thousand rubles only for work), he unanimously decided to make repairs with the forces of his limbs and gray matter.

And so, the age-old question, to which I did not find a detailed answer on the forums: "Capital of the engine, what and how to do?".

I'll start, perhaps, with a list of special tools that you may need for this ritual:
• set of heads;
• a mandrel for piston rings (about 260 rubles, but you can collect it yourself from a sheet of tin);
• mandrel for valve stem seals (20 rubles);
• valve desiccant (80-100 rubles);
• torque wrench (it is necessary to take such that the size of the square is the same as on the heads) (1300r);
• micrometer (500-600 rubles);
• mandrel of the clutch disc (50 rubles);

• a device for adjusting valves with a hour indicator (500-800 rubles);
• two- or three-legged stripper (400-500 rubles).

For spare parts:
• pistons;
• piston rings;
• main and connecting rod inserts;
• crankcase gasket;
• block laying;

Literature:
• Repair manual for your car;
• spare parts catalog (of course, rare in our days, but you can find it on the internet)

The engine capital has been completed. Now you need to drive the first 2500 km carefully without sudden accelerations, without overloading the engine. After driving 2500 km, change the engine oil. Look under the hood frequently to check the unit.

Advice for those who will disassemble the cylinder head.
As you know, a regular drying agent is not a very convenient thing and easily flies out of the engagement on a hairpin. I advise you to tighten two nuts on the hairpin and clamp the grip of the device between them, then the chance of getting the device on the forehead will be minimal.

In the family of "classics" VAZ 2107 is the last model of the conveyor assembly, which was mass-produced from 1982 to 2012. In recent years, its modification - LADA-21074, intended for sale in the automotive markets of other countries, has come off the assembly line. She had internal differences, in particular a different power unit and electrical control circuits.

Wiring diagram VAZ 21074 instrument panel assembly

The basis for the luxury rear-wheel drive "classics" of the Soviet automobile industry was the platform of the VAZ 2105 car. The car was produced in two versions:

With the VAZ 2107 index - for the domestic market;
With the VAZ 21074 index (outside the country - LADA-21074) - for export.

The export version was slightly more expensive. Nevertheless, a significant part of VAZ 21074 cars were sold in Russia. And most of them to this day regularly serve their owners, who prefer to service the vehicle with their own hands.

However, in the process of repair and preventive maintenance of the car, the owner needs:

Instructions with wiring diagrams related to this model;
Knowledge of the basics of working with electrical systems of cars of the VAZ family (see also the article Wiring - VAZ 2109: what is possible and what is not)

Let's see what is the difference between the predecessor VAZ 2107 and modifications.

But first, let's define a list of these modifications that rolled off the assembly line in the indicated years:

A car with the LADA-21074 index;
A car with the LADA-21074-20 index;
A car with the LADA-21074-30 index.

For reference: In all three modifications, the car was equipped with a 1.6-liter power unit from the VAZ 2106 model with a capacity of 75 hp. This was reported in every promotional video of those years.

Differences in the indices of one model are explained as follows:

LADA 21074 - with a carburetor engine;
LADA 21074-20 - with multipoint injection. Complies with EURO-2 standards;
LADA-21074-30 with multipoint injection. Complies with EURO-3 standards.

The use of an injection system for supplying fuel to the cylinders led to the fact that the engine compartment wiring of the VAZ 21074 was produced for this modification.

She was in addition to the standard one, and served:

Electric fan drive chain;
Intake manifold throttle actuator control circuit;
The work of the electronic engine control system (ECM).

Power unit VAZ 21074 with injection power system

For the VAZ 21074 dashboard, a "donor" unit with a VAZ 2105 was used. Accordingly, the wiring diagram of the VAZ 21074 dashboard was borrowed in full.

Photo of the electrical diagram of the instrument panel VAZ 2105 and VAZ 21074

The fuel injection system cannot be operated without a fuel pump. On the VAZ 21074 model, an electric fuel pump was installed under the rear wing. For its operation, a separate wire was added to the standard wiring. And the fuel pump itself (below in the diagram under No. 9) worked in the electrical network together with:

Wiring diagram for the rear of the car VAZ 21074

Rear window heating elements (No. 10);
Interior lampshades (No. 7 and 8);
Additional braking signal behind the rear window (No. 11);
License plate lights (No. 14 and 15).

Due to the unification of many electronic components of the VAZ family, motorists spend time looking for the desired wiring, not suspecting that it may have an index of another model.

The presented list contains indices of some of these products installed on the VAZ 21074: