The power system of the VAZ 2109-2108 injection and carburetor are very different, so the procedure for replacing many parts can be radically different. The same applies to changing the air filter. Of course, all this is done very simply and there will be no difficulties with this service, but the procedure for performing actions is already different.
Firstly, it is worth noting that on the VAZ 2109-2108 injection engine, in order to replace the air filter, you only need a Phillips screwdriver, there is no need to have any more tools at hand.
So, open the hood of the car and disconnect the power plug from the mass air flow sensor:
Then we unscrew the 4 bolts with which the top cover of the casing is attached:
After all of them are unscrewed, you can lift the lid and remove the old filter from there:
After the old filter is removed, it is necessary to carefully wipe the dust inside the housing, and only then install a new element! Please note that the ribs should be directed in the direction of the car, as clearly shown in the photo above.
Installation is carried out in the reverse order and will not take more than 3 minutes. Remember to replace at least once every 30,000 km, although in conditions where there is a lot of dust (rural areas), this can be done twice as often. The price of these consumables is quite low, so it's not worth saving on it!
The fuel filter is an element of the power supply system (fuel supply system) of the injection engine of VAZ 2108, 2109, 21099 cars.
Purpose of the fuel filter
The fuel filter in the power supply system of the injection engine of VAZ 2108, 2109, 21099 cars is designed to filter fuel (remove mechanical impurities) entering the main fuel line from the gas tank.
Location by car
The fuel filter on VAZ 2108, 2109, 21099 cars is located under the bottom of the body, near the gas tank. It is built into the fuel supply line between the electric fuel pump in the gas tank and the fuel rail on the car engine.
Fuel filter device
The fuel filter consists of a metal housing with threaded fittings on both sides. Inside the filter there is a paper filter element that traps various foreign particles present in gasoline. From the fuel pump, fuel flows through a rubber hose to the filter inlet fitting.
The principle of operation of the fuel filter
The electric fuel pump pumps gasoline from the fuel tank through a rubber hose to the inlet fitting of the fuel filter. In the filter housing, the filter element traps foreign particles present in gasoline. Further, the fuel enters through the filter outlet fitting into the metal tube of the main fuel line and further along it into the fuel rail with injectors on the engine. The direction of fuel flow is indicated by an arrow on the fuel filter housing.
Fuel filter malfunctions
- The main malfunction of the fuel filter is a decrease in its throughput due to clogging with foreign impurities present in gasoline. As a result, it becomes problematic to create the necessary fuel pressure. There are jerks and dips in the operation of the engine, unstable idling, the engine may stall both at idle and in motion, etc.
- In other cases, the fuel filter may, on the contrary, not filter out mechanical impurities in gasoline, but pass them into the fuel rail to the injectors. The occurrence of such a situation is possible due to its poor-quality manufacturing or deformation from impact.
The fuel filter change interval is 30,000 km. In some cases (constant use of low-quality fuel, a car with high mileage or a fuel tank that has not been cleaned for a long time, etc.)
Applicability of fuel filters in fuel injection systems of VAZ 2108, 2109, 21099 cars
Fuel filters 2112-1107010-01 (02, 03, 04, 05) of domestic production or their imported analogues (BOSH F0124, MANN WK612/5, Champion L240, ACDelco GF613 and etc.)
Fuel filters are designed to clean the fuel supplied to the engine from resinous water impurities, dirt particles and sediments in the fuel tank. The reason is the physico-chemical processes that cause the appearance of various kinds of pollution.
Consider what consequences they can cause in a VAZ 21099.2109 car (injector). Resins adversely affect pipelines, nozzle bypass valves, which causes the entire fuel system to suffer. The presence of water or condensate in the fuel provokes the formation of corrosion, damage to the parts of the fuel supply system to the injector and can lead to breakage of the cylinder-piston group.
Dirt clogs the fuel channels, and in combination with the presence of water in the fuel and in winter, it makes it difficult to start the engine, as it can freeze in the fuel line.
The fuel filter must be changed periodically, which will avoid many breakdowns of 21099,2109 series cars. The durability of the filter depends on the driving style, the environment where the VAZ is operated, the condition of the fuel system as a whole and, of course, primarily on the quality of the fuel used.
Owners of VAZ 21099.2109 should know that it is recommended to change the fuel filter every 20 thousand kilometers. Given the not the highest level of fuel at domestic gas stations, it is advisable to replace the filter more often, as it becomes clogged with all sorts of impurities and dirt, which increases the load on the engine, reducing power. The fuel system will last longer if the fuel filter is replaced in a timely manner.
It is worth noting that replacing the VAZ 21099.2109 fuel filter is not difficult and the driver can do this procedure without having much experience in driving and operating a car. If you encounter this problem for the first time, then learn how to change the filter on a VAZ with an engine on which the injector is installed, follow the recommendations below.
Fuel filter replacement
According to the schedule of routine maintenance as part of the maintenance of VAZ 21099.2109 cars, the fuel filter must be replaced after 20 thousand mileage, but as mentioned above, it is advisable to replace it at 15 thousand or even earlier, given the influence of external factors. Below is the procedure for replacing the fuel filter on VAZ 21099.2109 models with an injector.
To replace the filter, you must use a pit or a lift. Work must be carried out in a well-ventilated room or outdoors, it is not recommended to work in the heat, the whole process is carried out away from sources of open fire.
The fuel filter is located under the car behind the fuel tank near the exhaust pipe. To remove it, you need to loosen the bolts that tighten the holding bracket.
Next, unscrew the two fittings of the inlet and outlet pipes. In order to unscrew the nuts, you need two 19 wrenches with which we unscrew the nut located on the filter housing, which fixes the pipeline.
It is imperative to fix how the fuel direction indicator is located, and it is also necessary to take into account the possibility of fuel leakage from the nozzles.
When reinstalling, pay attention to the direction indicator, as fuel will not pass through the pipeline to the injector through an incorrectly installed filter. Check the presence and integrity of the O-rings, without which the installation is prohibited, as this will lead to leaks and may cause an emergency. After installing the filter, we start the VAZ engine and check all the connections and the filter itself for leaks, if any, we eliminate them by tightening (but in moderation), or replacing the seals.
Necessary precautions for replacement:
- Do not smoke while working on the fuel system.
- Perform work with a fire extinguisher.
- It is not allowed to get gasoline on the mucous membranes and in the eyes.
- It is necessary to work with good ventilation.
- The ambient temperature should not exceed 25 degrees.
Perform work after the engine and exhaust system have completely cooled down. The installation of the fuel filter is carried out strictly in the reverse order, so that the fuel system does not fail. The process of replacing the fuel filter does not require special skills, and given the above recommendations, it can be performed by a driver with little experience.
Accordingly, the cost of maintenance of the VAZ 21099.2109 will be much lower, and the car will behave faster. And of course, it is necessary to strive to use only high-quality fuel.
Not really
Fuel-cleaning elements are necessary in order for fuel to be supplied to the power unit, purified from various impurities and dirt in the tank. The VAZ 2109 fuel filter (an injector is installed or a carburetor) traps all these elements, resulting in a high-quality combustible mixture.
If the filter is clogged or of poor quality, then the resins have a destructive effect on all engine systems, clogging pipelines and nozzles. The presence of water in the fuel contributes to the appearance of rust, damage to the elements of the system, which will inevitably lead to breakdowns in the cylinder-piston group.
Dirt, which is in the channels along with water in the fuel, at low temperatures, freezing, can cause difficulty starting the engine.
The condition of the fuel purifier largely depends on the external factors in which the car is operated, but to a greater extent on the quality of the fuel.
Experts advise to carry out more often than indicated in the documentation. This is due to the fact that the quality of gasoline or diesel fuel at our gas stations is often quite low. Domestic fuel is not distinguished by either perfect purification or ideal conditions for transportation and storage. As a result, an increase in the load on the engine and a decrease in its power, as well as a decrease in the resource of the fuel system.
Replacing the fuel filter, whether an injector or a carburetor is installed, is quite simple, and the filter itself is inexpensive, so do not forget to replace it in time. And how to save money by installing it yourself, we will tell in this article.
[ Hide ]
Instructions for replacing with an injector
In accordance with the service work schedule, on VAZ 2109 vehicles with an injector, the fuel cleaning element must be changed every 20,000 kilometers. But as we have already said, in our conditions it is better to reduce this period by half.
What will be needed?
Stages
All work must be carried out on a pit, overpass, or raise the car on a lift. The room should be well ventilated and there should be no open sources of fire nearby.
In a VAZ car with an injector, the fuel cleaner is located under the car behind the fuel tank near the exhaust pipe.
Instructions for replacing with a carburetor
The fuel cleaning element on the VAZ 2109 with a carburetor, according to the regulations, must be changed every 10 thousand kilometers, but, taking into account the low quality of our gasoline, it is desirable to reduce this period to 7 thousand kilometers. The fuel filter is located under the brake master cylinder and secured with two clamps.
What will be needed?
Stages
- We loosen the clamp, which is located on the side of the motor.
- Remove the hose from the fuel cleaner. You need to be careful here because some gasoline may spill.
- After loosening the clamp, remove the hose, which is located on the side of the tank.
- We put a new filter. It is also important here that the arrow coincides with the direction of fuel movement. It should point towards the pump.
- We tighten the clamps.
- Next, you need to pump gasoline into the fuel cleaning element, because it is still dry. This must be done with a fuel pump. By pressing a couple of times on its lever, you can see how the filter begins to fill with gasoline.
- We start the car and check for fuel leaks.
Safety precautions during replacement
- Smoking is strictly prohibited when working on the fuel system.
- There should be a fire extinguisher nearby.
- Be careful not to get fuel in your eyes.
- The room in which the work takes place must be ventilated.
- Do not replace if it is too hot outside.
- Proceed with the replacement only on a completely cooled engine.
As you can see, replacing the fuel filter is a fairly simple process that does not require special skills, and, having carefully studied the instructions, even an inexperienced driver can handle it.
From a practical point of view, the fuel filter is a barrier that maintains the required composition of gasoline. All motorists, without exception, know how the composition of gasoline affects the technical and functional abilities of the car.
In the VAZ 2109, replacing a fuel filter is a completely common task, however, to successfully solve it, you need not only the appropriate resource capabilities, but skills combined with knowledge. Replacing the fuel filter with a VAZ 2109 can be easily done on your own.
Most Common Underlying Causes of Premature Fuel Filter Failure
Here's a list of them:
- It is a well-known fact that the life of a particular component of the car depends on the degree of its quality. Since, to be honest, today there is no commission of the quality standard for technical products that would not allow for sale those technical products whose requirements do not correspond to those specified in the documentation.
Note.
During the Soviet Union, quality control was taken over by the state. Today, this role formally belongs to the national dealer, who is only interested in receiving financial profit.
- Many companies from China invest heavily in marketing, thanks to which they manage to find many dealers and sign long-term contracts with them.
Note.
For example, the dealer himself (the owner of an auto parts store), in most cases, is reluctant to understand his products from a technical point of view. This is used by the manufacturer, convincing of the high quality of their parts, promising the same technical capabilities as European manufacturers, only at a significantly lower cost.
All these processes together lead to the emergence of countless crafts on the national market.
The main reasons for premature replacement of the fuel filter:
- the presence in auto parts stores of a huge number of counterfeit fuel filters;
- overloading the filter with gasoline (extremely rare);
- poor-quality or even incorrect installation;
- low quality of the fuel itself.
Objective reasons that allow you to establish the fact of purchasing a fake fuel filter:
- poor traction;
- insufficient motor power;
- reduction in the number of revolutions;
- sharp stalling of the engine when the ignition is turned on, etc.
Notes.
In order to reduce the risk of purchasing a fake fuel filter, you need to buy it only from reliable dealers who provide warranty. If the car owner is a beginner, then you need to take the advice of friends who have repeatedly purchased any car components.
Practical instructions and basic postulates for replacing a fuel filter on a VAZ
So, the fuel filter is a device that is responsible for the quality of gasoline. As everyone knows, first gasoline enters the fuel tank, from where it is pumped into the engine.
The fuel filter itself is located at the middle distance between the electric pump and the car engine. Its main task is to correct the composition of gasoline.
In the event that it fails due to a number of the above circumstances, it is necessary to immediately replace the fuel filter VAZ 2109.
Note. It is more expensive to use low-quality gasoline, since the forced premature replacement of the fuel filter VAZ 21093 injector is a very financially costly procedure.
Preliminary preparation of the car for the replacement of the fuel filter:
- first of all it is necessary to make sure that the engine has completely cooled down;
- drain all gasoline from the fuel system of the car;
- make sure you have a fire extinguisher nearby;
- inspect the nearby working area so that suddenly there are no elements nearby that can hypothetically create a spark.
Fuel filter replacement algorithm:
- opening the hood, first you need to remove the negative terminal from the battery for safety reasons, so that a spark cannot even randomly form;
- then, you need to remove the clamps from the outlet and inlet fuel hose;
- disconnect all possible hoses from the old fuel filter (after disconnecting, the hose must immediately be directed upwards so that gasoline does not spill out);
- carefully study the new fuel filter and find special marks on it in the form of arrows, which actually indicate the correct connection of the inlet and outlet hose;
- before connecting the hoses to the new filter, first of all, you should make sure that there is no gasoline in them;
- after which, it will be necessary to put on new clamps;
- be sure to check the absolute tightness;
- put the terminal on the battery again and now safely close the trunk of the car;
- turn on the ignition and check that the engine is working properly.
From a practical point of view, it does not cause difficulties and even a motorist with little driving experience can handle it, however, in general, the procedure itself requires a high degree of vigilance. If at least one of the safety rules is not followed, the consequences can be extremely negative.
Note. General safety rules have been developed based on practical situations, so their observance must be taken seriously, especially since they are easy to implement and do not require any significant effort.
The assembly of the fuel filter must be carried out strictly in the reverse order of disassembly, otherwise the car engine may simply not work or fail prematurely. The replacement of the fuel filter itself does not require special specialized knowledge or skills, the main thing is to follow the general instructions, since a high-quality installation will allow the engine to last for many years without any complaints.
All of the above provisions must be visualized with the help of photo and video materials. From a practical point of view, the instruction is easy to follow, the main thing is not to forget about security measures.
Do-it-yourself fuel filter replacement is within the power of every motorist. Plus, the price will be much lower if the replacement is done on your own, and not in a car service.
It is also always necessary to strive to use only high-quality fuel.
