Fuel tends to get dirty, like any other automotive fluid. While the engine is running, various debris particles get into it, as a result of which an unwanted breakdown may threaten the car. In order to avoid costly car repairs, it is necessary to install a fuel filter and periodically replace it.
The fuel filter (TF) has the ability to filter out dust and dirt particles, and also prevents them from entering the engine fuel system. In the absence of this component in the device, harmful particles clog the channels and can disable the entire fuel system.
Fuel system types
Gasoline filters have a different design, depending on the type of fuel system of the car on which they are installed. There are three types of fuel systems:
- injection;
- carburetor;
- diesel.
The specificity of diesel filters is that the type of such an engine is very vulnerable, so the fuel for such systems must be thoroughly cleaned. In this case, the fuel goes through 3 stages of cleaning: in the gas tank, then coarse and fine cleaning. Also an important factor of the diesel fuel filter is the ability to prevent moisture from entering the combustion chamber. Given all these circumstances, it becomes clear why a diesel filter is an order of magnitude more expensive than a gasoline filter.
In turn, the design of filters can be of two types: non-separable and prefabricated. If your car has a non-separable gasoline filter, then if it is unusable, you will need to make a complete replacement of the component. Prefabricated filters do not claim to be a complete replacement, here it will be enough to replace the filtrate itself.
Keep in mind: the right filter for your car model will save fuel, as well as increase the replacement interval.
If the element is not replaced on time, the consequences for the fuel system can be very sad.
If you do not know where the fuel filter is located in your car and what is the frequency of its replacement, then we advise you to refer to the operating instructions or to the service station specialists. From the editors, we can only add that on carburetor and diesel cars, most fuel filters are located in the engine compartment. The gasoline filter in injection cars is located under the bottom (in case the filter is not separable) or under the rear seat. In this situation, the fuel filter is usually located in the fuel pump and its change is carried out by replacing the fuel pump. Injection filters are not subject to rust, as they are made of an alloy of aluminum and plastic.
Fuel filter replacement interval
The information given in this chapter will be useful to those motorists who do not know after how many kilometers the fuel filter should be replaced. If you are in doubt about the frequency of filter replacement and do not know how much more your car will drive on it, then find the instruction manual or use the recommendations of an authorized dealer. In any case, this factor depends only on the condition of your vehicle and its operating conditions.
The dustiness of domestic road surfaces and not the highest quality of gasoline allows you to make a discount of at least 10 thousand kilometers from the figure indicated in the instructions. In other words, if the manual indicates the frequency of filter replacement every 40 thousand km, then it needs to be changed every 30 thousand km. In fact, service station experts recommend replacing fuel filters every 20–25 thousand km. mileage, regardless of the manufacturer's instructions.
If the fuel filter is very dirty, and this happens when the element is not replaced in time, then the engine may not work at all. Evidence of the unsuitability of the component may be other signs of failure, which make themselves felt through the high mileage of the car on a clogged fuel filter.
The main signs of a fuel filter failure
- Intermittent engine operation;
- While driving, the car sometimes loses power;
- While driving at low speeds, when you press the pedal, the car stalls, no matter how much you “sink” it into the floor;
- Incorrect gear shifting (in the case of automatic transmission, it incorrectly transmits engine impulses to gear shifting and does not produce them on time);
- Excessive fuel consumption.
These signs accompany the breakdown of the fuel filter. If they do not make themselves known, then you will only find out about a malfunction when, at one far from perfect moment, the car simply does not start.
How to change the fuel filter
The age-old questions “How to change the fuel filter?” and “How long can it serve?” worries every motorist. Without sufficient practice or even a base of theoretical knowledge on replacing a part, you can seriously damage your car's fuel system. Installing a fuel filter is a fairly simple operation, so by following the instructions in the step-by-step guide, you can handle this task yourself.
What is required to replace the fuel filter?
If the fuel filter is under the bottom of the car, then you will have to use a viewing hole. Before dismantling the fuel filter, prepare:
- New fuel filter;
Choose those that were produced by the manufacturer of your car or those that you are advised to install by the master
- Set of wrenches;
- Phillips and Spitz screwdrivers;
- Soft fabric.
Fuel filter replacement instructions
This manual describes in general terms the procedure for replacing a non-separable fuel filter for any vehicle. Based on the design of the vehicle, there may be some differences in the process. If your auto fuel filter is located in the fuel pump, then first read the manufacturer's recommendations. Quite often, manufacturers advise changing the filter along with the fuel pump.
So, you decided to dismantle the clogged fuel filter:
- First determine the location of the filter. As mentioned earlier, in carburetor and diesel cars, the element is located under the hood, under the bottom, or in a tank with a gasoline pump (in gasoline cars)
- Regardless of the location of the fuel filter, the fuel pump fuse is removed and the time is waiting until the car stalls. This is necessary in order to eliminate pressure in the fuel system.
- Next, remove the negative battery terminal to prevent fire during the fuel filter replacement procedure.
Removing the old fuel filter
- Then we carefully inspect our fuel filter, and before removing it, we determine the method of fastening it to the gas pipeline (fasteners can be inlet or outlet). Depending on the design of the car, either latches or bolts are used. Be sure to remember the mounting sequence so as not to confuse anything when installing a new fuel filter. You can even take a picture of the place where the fuel filter is installed on the cell phone camera. Also, do not forget about the location of gaskets and rubber bands.
- After that, take a rag and wrap it around the fuel filter. A rag is needed in order not to get your hands dirty, as a small amount of gasoline will leak out of the fuel filter. Using a wrench or Phillips screwdriver, disconnect the fuel filter from the mounting location. And then take it off.
Installing a new fuel filter
- The new cleaning filter is installed in the same position in which the old one was attached.
Pay attention to the arrow showing the direction of gasoline
- Make sure the integrity of the pipe and connect the gas line. If it is damaged, then replace it;
- Now we install the fuel pump fuse in its original place and connect the battery terminals;
- Try to start the engine. The pressure was released in the fuel system, so the engine may not start the first time. Turn on the ignition for 30 - 60 seconds, then try again.
Be extremely careful, do not forget about safety precautions! If the fuel filter is being replaced, then smoking indoors is strictly prohibited! It is also desirable to pre-ventilate the room.
We offer you to watch the following informative video on the topic of replacing the fuel filter
Visually, any fuel, be it diesel or gasoline, is a crystal clear liquid. However, in reality, it contains a lot of various chemical additives, additives, deposits and even water. And what is most offensive, it is simply impossible to determine the true quality of fuel outside of laboratory conditions. Some gas stations take advantage of this, selling motorists often diluted gasoline with a lot of unnecessary cetane-boosting additives and road dust.
Low-quality gasoline primarily affects the condition of the fuel system. The longer the car is driven on diluted fuel, the more carbon deposits accumulate in the engine and deposits in the filters. Various resins and condensate can significantly reduce the life of the motor. Therefore, to reduce these risks, automakers equip their cars with special fuel filters. It is they who take the brunt of the blow, cleaning the fuel from large particles of dust and unnecessary resins. Accordingly, its service life is not unlimited.
How often should the filter be changed?
Experts assure that for the coordinated operation of all engine systems, this element must be changed at least once every 10-15 thousand kilometers. Some motorists ignore this rule in an effort to save money. But in fact, by this action, they only aggravate the situation, which is fraught with costly repairs, and sometimes even the replacement of some components.
Why is it important to observe the frequency of replacement?
Having exhausted its resource, a worn filter is no longer able to provide normal fuel filtration. As a result, fuel with a mass of dirt and tar goes straight into the combustion chamber, where, at the end of the internal combustion engine cycle, it is converted into a persistent coating - soot. If this is not prevented in time, engine coking will be inevitable. But when there is a lot of soot in the engine, it becomes less productive, and at the same time it consumes more fuel than before. In the winter season, due to condensates, the fuel lines may freeze, which makes it simply impossible to start the engine. Thus, the filter takes on all the low-quality impurities and deposits that were in the fuel, and thus ensures the smooth operation of the engine.
How to change the fuel filter? Signs of need for replacement
There are several symptoms in which the car needs to be replaced this part. First, it is the uneven operation of the engine. The motor starts to triple, sometimes even "sneeze" on the go. Secondly, with a dirty filter, you will feel a significant drop in power. The dynamics of the car falls, while fuel consumption increases.
The extreme degree of filter clogging is the inability to start the engine. Most often, in such cases, he needs decarbonization or replacement of candles. But you should not hesitate to replace the filter, but it is best to control the mileage and make this repair every 10 thousand kilometers. Subject to this rule, the car will thank you with stable engine operation and acceptable gas mileage.
Where is the fuel filter located?
It is worth noting that the location of this part may vary depending on the year in which the car was produced and by which manufacturer. Where is the fuel filter located on modern cars? Most often, manufacturers install it between the tank and the fuel pump. This is the most common installation scheme for this part. Sometimes it is mounted directly into the tank.
Do-it-yourself replacement: preparing tools
Before replacing the fuel filter, it is necessary to prepare a minimum set of tools. Depending on the specific car model, you need to have keys for 10, 17 and 19 millimeters. Thick rubber gloves are also desirable. Thanks to them, the ingress of gasoline on the surface of the skin of the hands will be excluded.
Safety regulations
Before we tell you how to change the fuel filter, we note that on some cars this repair is not complete without the use of a manual or hydraulic jack. Most often, this action is resorted to by owners of cars with low ground clearance. In this case, the machine must be placed on supports. As the latter, you can use brake shoes, or just building bricks. And of course, when working with a jack, you must put the car on the hand brake. Otherwise, the slightest shift of the support may cause the car to fall or run right into you.
It is also necessary to say that each car has its own, the safest point for installing a jack. You can find out about it in the owner's manual for your vehicle. Before changing the fuel filter, you need to carefully fix part of the bottom on the supports.
To do this, you need to put one or more bricks, and in the place of their contact with the body, put a thick piece of rubber. The latter will significantly soften the pressure force, thereby preserving the fragile elements of the bottom from deformation.
Instruction
So how do you change the fuel filter? "Priora", "Kalina" and other modern "passenger cars" are being repaired as follows. First, disconnect the negative terminal from the battery. This action is not necessary, but it will prevent the possibility of short circuits (after all, gasoline is a very explosive substance). Next, using a key of 17 or 19 millimeters, the worn filter is clamped. With a key of 10, the fitting of the mechanism is unscrewed. You must be very careful, as there is a risk of gasoline residues getting on the skin or in the eyes. Previously, before this, you should put a small container under the filter so that the fuel flows into it (and not on the garage floor, as is often the case).
Having unscrewed the fitting, it is necessary to loosen the clamp and finally pull it out. How to change the fuel filter? After removing the fitting, you can safely remove the filter itself. Here it should be remembered that this element has its own polarity, which is indicated by a special arrow. Remember its location - the new filter must be mounted with the same direction as the worn one.
After removing the old part, you can safely proceed to install a new one. It is done in reverse order similar to removal. We have already talked about the main nuance about the arrows and polarity, but besides this, one more point needs to be highlighted. When replacing the filter, the retaining clamp must also be changed. This action is not necessary, but it will ensure a longer filter life.
In order to prevent a jet of fuel from hitting you when replacing, first reduce the pressure. This is done by pressing a finger on the ramp spool. There is another alternative way. To do this, remove the fuse and leave the engine to idle until it stalls.
How to check if the installation is correct?
Before changing the fuel filter, "Kalina" and "Priora" must be put on the "transmission" or on the hand brake. Since you will be doing most of the work under the bottom, it is important that the machine does not roll downhill in one direction or another.
After completing the work, you need to make sure that their work is correct. To do this, turn on the engine and look at the condition of the fuel filter. The injector will spray fuel normally only if there are no holes in the system. In simple words, when the engine is running, there should not be any leaks of gasoline from the filter. If you notice a hole, most likely it's the rubber rings. In this case, they must be replaced. On this, the question of how to replace the fuel filter with your own hands can be considered closed. In total, we spent about 400 rubles of money and 20 minutes of time.
Conclusion
As you can see, an easy replacement. The fuel filter (is it diesel or gasoline) is important to install, as they say, according to the marks. If the polarity is not observed, the part will not properly retain tar and deposits contained in the fuel.
In this case, all this dirt will penetrate into the engine, which is extremely dangerous and undesirable. Therefore, install the fuel filter correctly and carefully monitor its service life. Remember that timely replacement of this part prevents expensive engine repairs, which means it will save you money and time.
Any fuel initially contains a small proportion of mechanical impurities, dust and dirt particles, as well as a certain amount of water. To protect the engine from foreign particles entering the fuel mixture formation mechanism (carburetor, injector), the fuel supply system is equipped with a fuel filter.
Purpose and device of the fuel filter
Fuel cleaning usually occurs in several stages:
- First of all, large particles of impurities are retained (coarse cleaning). This function is performed by a protective grid installed in the fuel pump tank.
- The final purification of gasoline from polluting components is carried out by a fine filter installed in the fuel line between the tank and the vehicle's power unit.
The design of fuel filters can be different. Basically, it is a housing with an inlet and outlet fitting, inside which there is a filter element (for example, 10 micron filter paper).
Symptoms of a clogged fuel filter
When a gasoline filter fails, there are two possible consequences:
If the filter element is clogged with a lot of debris, then its throughput is seriously reduced. As a result, less gasoline enters the combustion chambers than is required for the engine to operate normally, which causes the following problems:
- increased fuel consumption;
- there are problems with starting the engine;
- traction characteristics of the engine are reduced (the car accelerates poorly);
- when you vigorously press the accelerator pedal, the engine stalls;
- the motor is unstable at idle.
If the filter element loses its properties, then raw fuel is supplied to the engine. This leads to clogging of the nozzles, the ingress of dirt into the combustion chambers and into the valve group. This situation can lead to damage to the power unit.
Replacement deadlines
The standard interval for replacing the fuel filter is set by the manufacturer of a particular vehicle, taking into account the features of its design. So, for front-wheel drive VAZs, it is recommended to change the filter after 30 thousand kilometers of the distance traveled. The Renault Nissan concern for its line of diesel power units has set a fuel filter change interval of 10 thousand kilometers. And the petrol models of the Ford Focus and Nissan Almera, in general, are equipped with maintenance-free filters which must function normally throughout the life of the machine.
Information on how often to change the fuel filter is indicated in the owner's manual, or you can also contact the authorized dealers of the corresponding car brand for a similar recommendation.
Taking into account the harsh domestic road conditions and the extremely poor quality of fuel at filling stations, for reliability, it is possible to reduce the regulatory period set by the plant by approximately 30%. This will minimize possible troubles associated with a sudden breakdown of the fuel system components.
Reminder! Select replacement parts that are compatible with the design of the vehicle and are officially approved by the vehicle manufacturer. Cheap analogues most often do a poor job of filtering gasoline and fail much earlier than the standard deadlines.
The Hyundai Solaris fuel filter replacement process is presented in the following video:
Other Reasons to Replace the Fuel Filter
There are a number of situations when it is necessary to change the gasoline filter, regardless of the past service life:
If foreign substances enter the fuel tank (including additives that have a negative impact on the operation of the engine), after flushing the fuel lines, it is imperative to install a new filter element.
If you had to refuel on the road with fuel of dubious quality, and after that there were problems with the normal functioning of the engine, in addition to all repair actions, you will need to replace the filter element.
Also, it would not be superfluous to replace the fuel cleaning device before traveling long distances (for example, to the sea) instead of an element that has already exhausted part of its resource, especially if there is no information about reliable gas stations on the chosen route.
Filter replacement for diesel engines
Features of the device of diesel engines make them very sensitive to fuel quality, therefore, the system of filter elements ensures the purification of diesel fuel from impurities larger than 4 micrometers.
For comparison! For normal operation of a carburetor engine, a gasoline purification level of 15-20 micrometers is required, and particles up to 10 micrometers are filtered in injection systems.
Based on the strict operating parameters, it becomes clear the high cost of high-quality devices designed for cleaning diesel fuel.
The diesel fuel filter can contain a primary (coarse) cleaning device, a fine filter and water separator, which enters the fuel along with diesel fuel during refueling, and also condenses in the tank from temperature changes during driving.
Most often, an emergency need to replace the fuel filter occurs during the winter operation of diesel engines for the following reasons:
- in the cold, the water accumulated in the separator freezes, and the throughput of the system decreases;
- Under the influence of negative temperatures, petroleum paraffins crystallize in diesel fuel, which clog the pores of the filter element.
Both options cause problems with starting the engine, and also lead to the operation of the motor in critical modes.
In the experience of previous generations of motorists, drivers whose work is related to the daily operation of diesel vehicles carry a spare fuel filter with them for quick replacement or install fuel system heaters.
Any automotive power plant, both diesel and gasoline, functions by converting the energy released during the combustion of a combustible mixture into the rotational movement of the crankshaft. Fuel, as part of the combustible mixture, is supplied to the cylinders of the power plant using a complex fuel supply system - the power system.
The device of the fuel filter of the car in the cut
To ensure the correct operation of the power system, as well as to minimize the possibility of failure of this system, the fuel must be purified from all kinds of mechanical impurities.
Why you need to change the fuel filter
In a gasoline carburetor power unit, these impurities can clog the fuel channels in the carburetor, which may cause interruptions in the operation of the power plant. In addition, mechanical impurities have an abrasive property, so they can eventually damage some elements of the carburetor.
The presence of impurities in gasoline is no longer desirable if the car has an injection system. Gasoline in such a system enters the cylinders under pressure and is dosed. The dosage of gasoline in such a system is produced by a nozzle. And in the design of the nozzle there are parts interacting with each other with high machining accuracy - precision pairs. So, impurities in gasoline with their abrasive properties can either damage the surface of these pairs, or jam these parts together, which leads to injector failure.
This is what a fuel filter looks like with a run of 30,000 km.
The most demanding on the purity of the fuel is the diesel power system. This power system has precision vapors not only in the injectors, but also in the high pressure fuel pump, so the presence of impurities can damage both the injectors and the pump. Therefore, fuel is included in the design of any power system.
What are fuel filters, their types and device
- an element of the fuel system that performs additional cleaning of the fuel from the impurities present in it. Typically, each power system has several fuel filters with different levels of fuel purification (coarse and fine filters).
The fuel filter for coarse cleaning allows you to clean the fuel from impurities with a size of up to 0.1 mm. Typically, such filters are a mesh made of brass. Often, such a grid is installed on cars in several places. So, often the first filter is a mesh installed in the neck of the tank. Typically, the throat mesh has relatively large meshes and is designed to hold particularly large contaminants.
In carburetor power systems, another grid is installed on the fuel intake. This grid already has significantly smaller cells and allows you to separate medium impurities from the fuel.
In some carburetors (Solex) there is often another grid with already small cells. It is installed in the inlet fitting.
In injection engines, the coarse fuel filter is also presented in the form of a grid, but it is included in the design of the gasoline pump installed directly in the tank.
Some fuel systems, mostly diesel, in addition to the screens that act as a coarse filter, are also equipped with a sediment filter. This filter is also designed to remove large contaminants.
Fine filters make it possible to purify fuel from impurities up to 0.001 mm in size. In different fuel systems, it is located in different ways. So, in the carburetor system, it is installed in the fuel line between the fuel intake and the fuel pump. In injection engines, a "thin" filter is located between the fuel pump and the rail. In a diesel engine, this filter is usually located between the sump filter and the high pressure pump.
Coarse fuel filters, since they are designed to trap large impurities, usually have a collapsible design, which allows them to be washed. Each of the brass grids installed in the power system can be removed, washed and installed back. The filter-sump, with any kind of design, can be disassembled, washed and it will continue to work. True, in some sedimentation filters, a filter element is installed, which, depending on the type, is either replaced or washed and installed back.
Types of fine fuel filters
Filters designed for fine purification of fuel are of two types: collapsible and non-collapsible. Collapsible filters are usually installed in diesel power systems, although non-separable filters are also found in engines with such a power system.
Since diesel power systems are very demanding on the quality of fuel, “thin” filters are replaced there much more often than in gasoline ones. Typically, the fuel filter consists of a housing in which the filter element is placed. Replacing the fuel filter of a collapsible design is carried out by disassembling the filter and then replacing the filter element.
Non-separable filter designs are used more often on gasoline fuel systems. In gasoline engines, the fuel filter is changed less frequently than in a diesel engine. Usually such a filter is simply disconnected from the power system and a new one is installed in its place.
In any case, in order for the power plant to work without failures, timely replacement of the fuel filter is required.
Where is the fuel filter
Before servicing the fuel system, you need to find out where the filter is located. Mesh filters, as already mentioned, have certain installation points, so finding them is not difficult.
Fuel filter on Lada Priore. The arrow shows in which direction the filter is placed.
Settling filters in any car are located near the tank. You can find out where the fuel filter sump is located by following the fuel pipes leading from the tank, they will lead to this filter anyway.
Finding a “thin” filter in a car with a carburetor system is also not difficult. This filter is usually located in the engine compartment. It is installed in the fuel supply line leading to the fuel pump.
A fine filter in a car with an injection system is often installed in the tank itself or near it. That is, in order to understand where the fuel filter is located in a car with this power system, it is enough to drive the car into an inspection hole. If it is not visible near the tank and the fuel lines lead from the tank directly to the engine compartment, then the filter is installed in the tank.
In diesel power plants, "thin" filters are often mounted in the engine compartment, not far from the high pressure pump. You can find it by following the fuel lines leading from it. The pipe entering the pump always comes from the fuel filter.
The use of low-quality fuel leads to damage to both the engine power system and the mechanical parts of the engine. The only barrier to various contaminants is the fuel filter. But its resource is limited, so replacement is required from time to time. After reading the article, you will learn how to change any type of fuel filter and find out when they need to be replaced.
When to change the fuel filter
The answer to the question - when to change the fuel filter lies in its device. After all, the filter is a pipe blocked by a cardboard (sometimes metal) element, which is permeable to fuel and insurmountable to dirt. Read more about the design of this important unit in the article (Fuel filter).
The average mileage of a car before replacing the filter is 20-30 thousand kilometers, provided that the car is filled with only high-quality fuel. Therefore, it is desirable to reduce the mileage to 15 - 20 thousand kilometers, because it is not known in what conditions the fuel was stored, how it was transported. If you refueled at an unknown gas station and do not know what quality their fuel is, or the car has traveled more than 50 thousand kilometers since the last washing of the fuel tank, reduce the mileage to 10-15 thousand kilometers. This will slightly increase your spending on the purchase of a new filter, but it will save the engine and fuel system from damage.
How to replace the fuel filter
Filter replacement technology depends on its type and location. Below you will read a detailed step-by-step description of the work on replacing any type of filter, and you will be able to choose the technology that suits your car. Remember to open the fuel tank cap before changing any fuel filter to relieve pressure in the system. When installing the filter, do not confuse the direction of fuel flow, it is marked with an arrow on the filter housing. Or the outlet tube is marked with an arrow.
To replace you will need:
- new filter;
- flat screwdriver;
- clean rag.
Place a rag under the filter so that leaked fuel does not stain the engine compartment. Use a screwdriver to unscrew the clamps that secure the inlet and outlet fuel hoses. Slide the clamps away from the filter. Remove one hose (it doesn't matter which one) and quickly lift it and the filter up with the second hose on to minimize fuel spillage. If possible, attach the hose to something (can be put between units or pipes) and remove the second hose from the filter. Take a new filter and insert it first into one hose, then into another. Do not confuse the direction of fuel movement, it is marked on the filter with an arrow on the body. Put the clamps on the filter legs and tighten them. Pump up fuel with a manual or electric pump (turn on the ignition on injection engines) and make sure that there are no leaks from under the clamps. Start the engine and watch the filter for 3 to 5 minutes to make sure there is no leak.
Replacing the manual filter on a diesel vehicle
To replace you will need:
- new filter;
- puller;
- flat screwdriver;
- clean rag.
Place a cloth under the filter. Try unscrewing it by hand (on most vehicles you need to turn it clockwise). If that doesn't work, use an oil filter remover (available at any auto shop). After unscrewing the filter, carefully remove it and screw in a new one. Tighten with a little force (0.5 - 1 kg). If you have a water sensor installed, then disconnect its connectors from the block, then unscrew it from the old filter and screw it into the new one. Loosen the fuel return (return) bolt from the injection pump or disconnect the return hose (you will need to unscrew the clamp) from the tube and place a transparent jar under it. 10 - 15 times pump fuel with a hand pump, watch the fuel exit into the jar. At first it will not go much (a few drops), then it will stop, and then it will go again. As it appears again, put on the return hose (do not forget to tighten the clamp) or tighten the bolt.
Replacing the filter on a diesel engine (booster pump in the tank)
- a set of open-end or box wrenches;
- flat screwdriver;
- filter corresponding to the model of the machine and engine;
- clean rag.
Loosen the inlet and outlet hose clamps, then remove them and lift them up to prevent fuel from escaping. Unscrew the filter attachment to the car body. Remove the filter. If a water sensor is installed on it, then disconnect the contacts from the block and remove the filter with the sensor from the hood. Drain fuel from filter and remove sensor. Screw it into the new filter. Install the filter in place, connect the hoses and sensor wires. Tighten the clamps. Remove the return hose from the tube and place a container under it. Turn on the ignition and wait until the pump fills the filter and high pressure fuel pump with fuel (it is advisable to perform this operation with two people). Turn off the ignition and put the return hose on the tube, tighten the clamp. You can also use the air bleed valve on the filter (it is made in the form of a bolt next to the fuel pipes). Loosen the bolt and turn on the ignition. When diesel fuel goes instead of air, turn off the ignition and tighten the bolt.
Replacing the high pressure filter (tank pump)
To replace the filter you will need:
- jack;
- stand;
- a set of open-end wrenches;
- bucket or basin;
- new filter.
Park the vehicle on level ground and turn on and off the fuel pump. To do this, pull out its fuse or remove the power wires from it (you will need to remove the mats from the trunk and open the pump hatch). When the pressure in the fuel system drops, the engine will stall. Turn off the ignition, turn on the first gear (parking mode on the automatic transmission) and the handbrake. Raise the rear left side of the car. How to do it safely, read the article (replacement and restoration of shock absorbers). If you can get to the filter without removing the wheels, then work like this. If not, then unscrew the nuts and remove it. On some vehicles, the pump is mounted on the rear right side, so make sure the pump is on the side you jacked up before removing the wheel.
Unscrew the tips of the fuel line and pull them out of the filter. Substitute a bowl or bucket under them. When gasoline stops dripping, remove the container and unscrew the clamp mounting bolt and remove the filter. Install a new filter, do not forget to put new sealing rings. Fasten the clamp, tighten the lugs, turn on the ignition and check that the connections are not leaking. Do not turn off the ignition for 5 minutes. If the leak does not appear, you did everything right. If you find a fuel leak, turn off the ignition and tighten the tips. Then check again. If everything is OK, install the wheel, tighten the wheel nuts and lower the car from the jack.
Replacing the high pressure filter (pump under the hood)
- To replace you will need:
- a set of open-end wrenches;
- rag;
- new filter.
Relieve fuel system pressure as described above. Put a rag on and disconnect the battery. Unscrew the tips of the fuel pipes and move them to the sides. unscrew the clamp bolt and remove the filter. Install a new filter (do not forget to replace the copper sealing rings), fasten the clamp and tighten the tips. Turn the ignition on and see if there is any leakage. If everything is normal within a minute, start the engine and let it run for 5 minutes. If found, stop the engine, disconnect the battery and tighten the tips. Wipe off the gasoline droplets with a rag and check for leaks again.
Conclusion
Replacing the fuel filter is a simple but important event, the condition and resource of the motor directly depend on the timeliness and correctness of which. Follow the recommendations from the article, take your time, be careful and careful, this will help you properly change the fuel filter on your car.
