Fuel pump for VAZ 2106

Design and principle of operation of a fuel pump

The basic design of the VAZ 2106 fuel pump can be seen below.

According to its principle of operation, the “six” gasoline pump is focused on creating excess pressure, which, regardless of the stage of engine operation, must constantly maintain the required level of gasoline in the float-type fuel chamber. The diaphragm is designed and developed such that fuel flow is stopped or reduced when the fuel line reaches a pressure limit.

The standard fuel pump is located on the left on a special boss of the engine block and is secured with studs through a thermal spacer and an adjusting gasket. This spacer also serves as a guide element for the VAZ 2106 fuel pump pusher, driven by an eccentric through the fuel pump drive, powered by the gas distribution mechanism in use. The length of the new fuel pump rod is 82.5 mm, the permissible value for operation is 81.8 mm; if this parameter is reduced, the product must be adjusted by selecting installation spacers or replaced with a new spare part.

For manual supply of gasoline using the pumping method, the product has a special lever, which is recommended to be used after a long period of use of the vehicle to fill the fuel line with fuel. It is capable of creating a pressure of 20-30 kPa with an injection rate of at least 60 l/h at a frequency of 2000 frictions (pumping) per minute.

Our online resource describes the design of the VAZ 2106 fuel pump under the nomenclature number 2101-1106010, produced at DAAZ in Dimitrovgrad. As an alternative, you can use a Pekar gasoline pump manufactured at the Saratov Fuel Equipment Plant. The design and development of the product was carried out by Pekar JSC from St. Petersburg.

By the way, many car enthusiasts praise the so-called. “VAZ 2106 plunger fuel pump”, which improves vehicle starting and operates with a high degree of reliability. A product of this type is nothing more than a Pekar gasoline pump, the top cover of which is made in a high style and resembles 2 cylinders connected to each other, on the end parts of which arrows in the direction of gasoline flow are stamped. The valves inside the product are very similar to plunger pairs, and with the light hand of car enthusiasts they began to be called “six” plunger fuel pumps.

Types of fuel pumps for VAZ 2106/07 cars

The manufacturer installs DAAZ fuel pumps (Dimitrovgrad Automotive Plant) on VAZ 2106/07 vehicles. The main purpose of the pump is to supply gasoline to the carburetor in the required volumes. The pump is based on a drive with diaphragms, and stable operation is ensured by the simultaneous use of three diaphragms. The capacity of DAAZ gasoline pumps for free drainage can reach 60 liters per hour.

The manufacturer installs DAAZ fuel pumps on VAZ 2106/07 cars

More modern VAZ models are equipped with Pekar gasoline pumps (St. Petersburg). Their performance is the same, but the increased tightness and resistance of the membranes to oil and fuel make the pump more efficient.

Modern VAZ models are equipped with Pekar fuel pumps

The VAZ 2106/07 fuel pump is located in the engine compartment .
It is attached to the engine cylinder block. The convenient location makes it easy to dismantle and install the pump even for an inexperienced car enthusiast.

Performance diagnostics

The main reasons for checking the performance of the pump are as follows:

significant reduction in fuel supply to the carburetor;
reduction in engine performance;
car jerking while driving.

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Before diagnosing pump faults, you need to make sure that other elements of the fuel system are working - the carburetor, fuel hoses, filters, etc.

For diagnostic work you will need:

open-end wrench 10;
flat screwdriver.

The work is performed in the following sequence.

On a car with a cold engine, the hood opens.
Use a screwdriver to loosen the clamp securing the pump inlet pipe.
Use a screwdriver to loosen the clamp securing the inlet pipe.
The pipe is removed and a plug (bolt of a suitable size) is installed in its hole to prevent fuel leakage.
The fuel supply hose is disconnected from the carburetor fitting and lowered, and a plug is placed in the hole.
By pressing the manual pump lever, the resistance of the diaphragm spring is checked - the pump should make retracting sounds. If there is no resistance and no characteristic sounds, then the pump is faulty.

Fuel pump repair - is it advisable to carry out?

Many motorists are trying to save on repairs; to do this, they buy a kit for restoring the VAZ-2106 fuel pump. Its price is 3-4 times lower than that of an assembled pump. But is the game worth the candle? According to reviews from the same motorists, the service life of elements from such kits is several weeks. After this, the unit ceases to perform its main function - pumping fuel.

The cost of a new pump assembly is 450-800 rubles. It is preferable to use Pekar, but its price is very high. But the service life and quality of the elements are excellent. As practice shows, repairing a fuel pump by replacing its components gives a positive effect for a short time. You can try to repair only if only the spring or diaphragm is faulty. There is no need to change valves. Therefore, it is better to purchase a new assembly and install it on the car.

Signs of fuel pump defects

Many car enthusiasts know that the fuel pump is a component of the “six” fuel system that repeatedly malfunctions or, in simple words, it malfunctions. Reasons: low-quality gasoline, clogged and lately replaced fuel filter, high loads on product parts, exposure to active ingredients due to oil and antifreeze leaks, low-quality rubber components, etc.

The main malfunctions of the fuel pump are a violation of the sealed conditions of the fuel pump, gasoline leakage and “the VAZ 2106 fuel pump does not pump,” i.e. failure of the product membrane. In this case, repairs “in the field” are possible, when drivers have, for example, to install high-density cellophane instead of the standard membrane, which allows them to get to their destination. A more civilized repair of the fuel pump for the “six” is to purchase a repair kit for the fuel pump and replace worn parts.

Why does the pump stop pumping?

A node can fail for various reasons. But most often this happens due to:

Resource development.
Destruction of elements due to incorrect assembly during repairs.
Destruction of elements due to manufacturing defects.

Be sure to make sure that there is gasoline in the tank, that the filter and the tubes going to it are not dirty. After this, you can only look for the cause of the breakdown of the VAZ-2106 fuel pump. They can be caused by:

Strong production of rubbing components.
Destruction of the diaphragm.
Loss of elasticity of the spring or its destruction.
Accumulation of dirt inside the valves.

Sometimes the car starts to behave strangely - at low speeds the engine runs stably, but at high speeds it starts to stall. In this case, you need to check the pressure generated by the fuel pump. There are two reasons for this behavior - insufficient fuel level in the float chamber and excessive wear of the VAZ-2106 fuel pump rod.

Signs of breakdown

Among the obvious breakdowns, the presence of which may require replacing the VAZ-2106 fuel pump, one can highlight one - a leak. If the housing is constantly wet, covered with gasoline that drips onto the engine block, it is necessary to carefully inspect the unit and make repairs. It is quite possible that the seal was lost due to loose tightening of the fastening screws. In this case, you don’t even have to disassemble the entire assembly, but wipe it dry and tighten the bolts with a screwdriver. If desired, you can change the engraving washers. If a leak appears from cracks in the housing, then it is better to completely replace the VAZ-2106 fuel pump. The price of a new one is not very high, but the resource is quite decent.

The next two malfunctions, typical of mechanical pumps, are diaphragm rupture and valve failure. If the membrane is torn, gasoline will begin to flow into the lower chamber of the fuel pump. And the unit will stop creating pressure in the system. There are two valves in the top cover - inlet and outlet. If one of them stops working normally, the necessary pressure will also not be created in the system. Very often the valves stick when exposed to high heat. In this case, you can moisten a rag with water and place it on the pump body - this is the only effective way out of this situation.

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Fuel pump repair

To repair a VAZ 2106/07 fuel pump you will need:

open-end wrench 13;
flat screwdriver;
two regular school rulers;
a clean container for draining gasoline.

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Dismantling the pump is carried out as follows.

The hood opens.
Use a flat-head screwdriver to loosen the clamp of the fuel supply hose on the pump body.
The fuel supply hose is removed.
Remove the fuel supply hose from the fuel pump
The fuel line is disconnected from the pump housing.
Plugs are placed in the resulting holes (clean M8 bolts can be used).
Using a 13mm wrench, unscrew the two nuts securing the pump to the cylinder block.
The pump is carefully removed and placed on a clean, level place. It is advisable not to damage the gaskets.

Replacing the rod

The rod is the metal rod at the base of the fuel pump. It wears out during use. This can only be noticed at high speeds - in urban conditions, it is usually impossible to detect rod wear. However, on the highway the car cannot reach speeds above 90–100 km/h.

Replacing the rod involves replacing two gaskets. The new rod should protrude beyond the boundaries of the spacer by 0.8–1.3 mm (optimally 1 mm). This can be achieved by selecting pads of different sizes. If the rod overhang is higher than recommended, there will be a risk of damage to the diaphragm; if lower, the engine will lose power.

When replacing the rod, it is necessary to correctly adjust the length of its protrusion

Cleaning the fuel pump

Cleaning the fuel pump means, first of all, cleaning the filter mesh, which stops the flow of fuel. The cause of contamination is usually low-quality gasoline - all the dirt and impurities remain on the mesh.

The mesh is located in the lower part of the fuel pump housing and can be easily dismantled after releasing the latches. It is recommended to first wash it with gasoline and then blow it with air under pressure. After this, the mesh is installed back.

The cause of grid contamination is often low-quality gasoline.

Using the repair kit

A repair kit for DAAZ or Pekar fuel pumps can be purchased at any auto store. It allows you to repair the fuel pump without going to a car service center. Usually the repair kit contains all the parts that need to be replaced.

The design of the VAZ 2106/07 fuel pump is quite simple, so disassembling it is not very difficult. After removing the filter, the mesh and diaphragm of the pump are inspected. If any mechanical damage is detected, the elements are replaced with new ones.

The fuel pump repair kit includes a diaphragm spring, the diaphragm itself and plugs

Removal and installation

The process of removing and installing the fuel pump is performed in several operations. The fuel pump is secured using two studs and nuts with the simultaneous installation of gaskets.

To remove the fuel pump, it is necessary to disconnect the discharge and supply pipelines and unscrew the fastening nuts.

When removing the pump, it is necessary to carefully disconnect the heat-insulating and sealing gaskets without damaging them.

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After the repair, it is necessary to perform an installation, which has a number of features. First of all, gaskets are installed: sealing gaskets with a thickness of 0.7–0.8 mm, then heat-protective and insulating gaskets 0.27–0.33 mm. It is necessary to comply with the condition that the pusher is slightly higher than 0.8 mm; if it does not peek out, then replace the gasket 0.7–0.8 mm with 0.27–0.33 mm.

If the pusher protrudes above the gaskets by more than 1.3 mm, replace the 0.7–0.8 mm gasket with a thicker one, 1.2–1.3 mm thick. It is also necessary to follow the procedure when a 0.27–0.33 mm gasket should be installed between the heat-insulating gasket and the body.

The set of gaskets between the pump and the cylinder block should allow the pusher to extend to a distance of 0.8–1.3 mm. After installing the fuel pump, it is secured and the fuel lines are connected.

The engine is started and the condition and functionality of the fuel pump and pipelines are checked for the presence of gasoline leaks.

Photo instructions

Disconnect the hoses

Fittings

Replacing the fuel pump

Removing the fuel pump

Replacing the fuel pump in a VAZ 2106 car

We carry out preparatory work, concentrate in one place the necessary plumbing tools and the new product to be installed. The fuel pump is replaced in the following order:

We loosen the fastening clamps with a figured screwdriver or wrench.
We disconnect the ends of the fuel line from the fittings of the product and then plug them to prevent fuel leakage.
We dismantle the fuel pump using a wrench.
We dismantle the thermal insulation spacer and the installation gasket.
The installation gasket should be changed, and the thermal spacer should be cleaned and placed in its original mounting location.
If repair of the fuel pump is required, it must be disassembled and worn components replaced.
If the product assembly needs to be replaced, then we place the gasket on the mounting studs, then install the “six” fuel pump.

The final installation of the fuel pump on the VAZ 2106 is carried out in the reverse order.

How to remove the fuel pump?

To replace the VAZ-2106 fuel pump rod and the entire mechanism, you must completely remove the assembly. To do this, just carry out a few manipulations:

Disconnect the hoses from the pump by loosening the clamps.
Using a “13” key, unscrew the two nuts securing the fuel pump housing.
Carefully remove the assembly, being careful not to damage the gaskets located underneath it.

There is nothing complicated about this. The new pump is mounted in the reverse order, just try not to overtighten the nuts. Otherwise, you will destroy the threads and you will have to install new studs.

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Disassembling the pump housing

To carry out all the work on disassembling the mechanism, you will need a pair of screwdrivers, a small hammer, a needle file, and a scraper. The disassembly looks like this:

Unscrew all the bolts that secure the housing halves.
Remove the diaphragms by pressing them and turning them 90 degrees.
Carefully remove the diaphragms and remove the spring.

If you want to experiment, try removing two valves and installing new ones in their place, which are included in the repair kit. Please note that if there is even minor damage or cracks on the housing, the entire assembly must be replaced. Don't even try to restore it. Repairing the fuel pump in this case is not cost-effective.

The most common failure of this type of pump is destruction of valves or diaphragms. In any store you can purchase these parts, which are installed on fuel pumps without the slightest modification. But the kit does not include plastic spacers. Therefore, you will have to use this element from an old fuel pump.

Replacing diaphragms and valves

To replace these elements, you need to perform a few simple manipulations:

Hold the diaphragm rod by the shank.
Unscrew the nut.
Remove all components of the diaphragm assembly. Be sure to remember how they are located.
Reassemble in reverse order. The holes for the bolts must match. The tongues should be directed in one direction.
Next you will need to remove the valves from the seats. First you need to open them with a needle file.
Be sure to cap it after installing a new valve.

If the valves are not secured, they may fall out during operation and, at best, cause a failure of the fuel supply system. During assembly, make sure that the hole in the spacer is opposite the pump lever. In this case, it will be possible to detect a leak much faster.

Fuel pump assembly

Having cleaned the filter and replaced the torn diaphragms, we assemble the pump in the reverse order of disassembly.

We install the strainer into the pump housing so that its hole is located above the valve. The flange of the filter hole should fit into the valve hole.

Pump installation

Installation of a new or repaired pump is carried out as follows.

The installation site is inspected. Carbon deposits or dirt are removed with solvent 642, and the surface is wiped dry with a rag.
Three new gaskets are put on the studs - adjusting (the thickest), heat-insulating and sealing. The gaskets must match the brand of fuel pump.
A new fuel pump is installed and secured with two nuts. In order not to create a lot of pressure on the flange, the nuts are tightened alternately.
Two fuel supply hoses are connected.
The engine is started and the functionality of the pump is checked.

Even an inexperienced car enthusiast can repair and replace the fuel pump on a VAZ 2106/07. To do this, you only need a repair kit (or a new pump) and a minimum set of standard tools.

Checking the fuel pump after assembly

After assembling the pump, we check its functionality:

We lower the pump inlet fitting into a container of gasoline and press the manual pumping lever several times. In this case, a pulsating stream of fuel should appear from the outlet fitting. This means that the pump diaphragms are intact.
We again lower the pump with the inlet pipe into gasoline and, plugging the outlet fitting with our finger, use the manual pumping lever to create pressure in the internal cavity of the pump.
After 10-15 seconds, releasing your finger, check the presence of residual pressure in the pump - gasoline should come out in a stream. If it is not observed, check the tightness of the connections of the body parts and valves. If tightening the screws fails to restore the tightness, it is better to replace the pump with a new one.

Sources

https://avtovx.ru/toplivnaya-sistema-vaz/benzonasos-vaz-2106-159/
https://autoclub.su/remont-benzonasosa-vaz-2106/
https://avto-idea.ru/remont/remont-i-zamena-benzonasosa-vaz-2106-i-2107-s-karbyuratorom/
https://FB.ru/article/339834/benzonasos-vaz—ustanovka-regulirovka-remont
https://ovaze.ru/266-remont-toplivnogo-nasosa.html

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Reason for replacement

In cases where there is a need to replace the fuel pump on a VAZ 2106? Naturally, there is only one reason - failure of the part. This manifests itself in the fact that the car periodically stalls even at idle. For those who have a rough idea of what is under the hood, let us further explain: fuel does not enter the carburetor. This is easily determined visually.

Attempts to manually pump up gasoline give only a short-term effect.

The conclusion is clear - the fuel pump needs to be replaced. Let us immediately reassure zealous car owners: this part is very inexpensive - about 500 rubles. Considering the exorbitant costs of servicing foreign cars, this is a mere trifle.