Petrol pump VAZ-2107: device and replacement

The petrol pump is one of the key elements of the fuel system of the car, which performs the function of injecting fuel from the tank and feeding it to the carburettor. What is most interesting, this part is the most susceptible to wear and very often fails. In today's article, we will consider which device has a gasoline pump. VAZ-2107 (carburetor) is a very whimsical car, so every owner of the "seven" should know everything about the nodes and aggregates of his car.

About construction

On cars of the "classics" family, DAAZ fuel cells are installed . Specifically at the "seven" pump is capable of pumping fuel in a volume of up to 60 liters per hour. The pressure produced in the system is about 20-30 kPa.

The design of this element includes the following parts:

1. Cover and screw cover.
2. The mesh filter.
3. The upper part of the body.
4. Upper plate.
5. Screws connecting the body parts.
6. Mounting nut.
7. Working diaphragms.
8. Stock.
9. Lower plate.
10. Remote spacers.
11. The manual swap lever.
12. The lower part of the body.

Troubleshooting and Diagnosis

The most common cause of faults in the VAZ fuel pump lies in the frequent wear of the gasket, resulting in leakage between parts of its housing. As a result, the integrity of all joints of the element is broken. That is, instead of gasoline, the pump starts to pump air, and the supply of fuel to the carburetor stops. In addition, the failure of the element can be caused by the rupture of the inner membrane.

It should be noted that with a broken pump, the fuel supply to the carburetor can stop completely, that is, start the engine "on a cold" and even "on a hot one" will already be impossible. And even if the launch was successful, when the acceleration is noticeably noticeable, the speed dips, and sometimes there is an unstable idling.

Check the serviceability of the fuel system can be very simple. To do this, remove the gasoline supply hose from the injection fitting and press the pumping lever several times. If the pump is functional, you will clearly see how a strong jet of fuel flows from it. If this did not happen, most likely, the fault lies in the intake valve. You can diagnose this node as follows. First remove the second fuel hose from the pump connection, then plug it with your fingers and press on the fuel pumping lever. On the fingers you should feel a small vacuum. If so, then the pump is working. If you did not feel the vacuum, then the fault lies in the fuel lines or in the tank itself. The tightness of the exhaust valve is checked as follows. First, a finger is applied to the opening of the injection nipple. After that, the manual pumping lever is pressed. The air must come out from the orifice. If this does not happen, the pump needs to be repaired or replaced.

Replacement of the petrol pump VAZ-2107: we prepare tools

In order to make an independent replacement of this part, you need to prepare the following set of tools:

1. Minus and Phillips screwdriver.
2. Folding wrench on 13.
3. Extension for the key.

Dismantling

In general, replacing a gasoline pump at the "seven" is a very simple operation, even a beginner can cope with. And the whole process is as follows. First, using a key to 13 millimeters, unscrew two nuts, on which a gasoline pump with gaskets is attached. In order to remove the element from the engine compartment, it is necessary to disconnect the discharge and supply pipelines beforehand. Next, take out the pump mounting nuts, remove the washers and the element itself to be replaced. When dismantling the parts you need to be extremely careful not to damage the thin gasket. The last part adheres to a heat-insulating thick gasket or to the pump itself. The thermal insulation part is removed by hand, without the use of any tools. By the way, under it there is one more sealing gasket - we also extract it.

Installation

How to install a new gasoline pump? VAZ-2107-injector, like its carburetor predecessor, has its own design features, so the installation of a new element will be slightly different from dismantling. So, let's get to work. First, a new gasket must be installed. Its thickness should be about 0.7-0.8 millimeters. After that, mount the insulation - a thickness of about 0.3 millimeters. So we will reach the minimum gap of the pusher outlet, which will be no more than 1.3 millimeters and not less than 0.8 millimeters. If the received indicator is below the specified rate, then the sealing gasket is changed to a heat-insulating one with a thickness of 0.3 millimeters. After the position of the pusher is normal, the gasoline pump is strengthened and tightened with nuts. Then everything goes according to the reverse principle - the fuel lines are connected and the engine is started. We start the motor in order to check the quality of the fuel injection. This completes our replacement of the gasoline pump. VAZ-2107 can now ride without any breakage at any long distance. By the way, in an ideal engine should work without interruptions (even 1-2 minutes), and from the pump there should be no leaks of fuel.

Conclusion

So, we figured out how to replace the gasoline pump correctly. VAZ-2107 (injector), or rather, its pump, withstands a resource of about 60 thousand kilometers. Therefore, you will have to change it at least once every two years. But still, this knowledge will not be superfluous for you, as in STR for the same 5-minute work with you will be asked for much more money than the detail itself. The new petrol pump VAZ-2107 price is about 1000-1300 rubles (the second-hand option costs about 180 rubles).