Replacing the diesel filter - how to do it!

A dirty or clogged diesel filter can quickly lead to serious problems. Therefore, it is important not only to check it regularly, but also to replace the fuel filter if necessary. A visit to a specialized workshop is required only for very few vehicles. As a rule, the fuel filter can be replaced without problems yourself. Below is all the important information about the diesel filter and its replacement.

Details about the functions of the diesel fuel filter

The diesel filter serves to protect the engine and prolong its service life. . Even high quality gasoline can contain tiny floating particles that can interfere with sensitive pistons inside the engine.

That is why fuel the filter ensures that all liquid is filtered on the way to the engine, so that no malfunction can occur here. At the same time, floating particles can still stick to the filter and clog it more and more over time. In this case fuel filter replacement is the only solution . This is because the diesel fuel filter cannot be repaired or cleaned.

The cross section of the filter will show that in most cases it consists of encapsulated layers of thin paper. They won't survive the purge. Thus, replacing the fuel filter is usually is the only correct alternative .

Here's how to tell if your fuel filter is bad

Fuel filter clogging is a gradual process that is not noticeable at first. . But gradually the signs accumulate, and begin to appear first symptoms of failure.

Symptoms of a clogged diesel filter include the following:

– Vehicle jerks unevenly when accelerating. – Engine power and acceleration are noticeably reduced – Power drops significantly above a certain rpm range – The engine does not always start reliably – Engine stops unexpectedly while driving – The check engine light on the instrument panel lights up

These are all signs of a clogged fuel filter. However, since these symptoms may have other causes as well, it makes sense to check the filter first. . This is usually the cheapest component that can be the cause of these symptoms. In addition, checking the filter and replacing it, if necessary, can be done quickly.

Diesel fuel filter change interval

Fuel filter change intervals are not exactly specified and may vary from vehicle to vehicle and depend on mileage. . Recommended replacement intervals are usually listed in the car's service book. However, it is safe to say that the intervals should be shortened if the car is driven a lot. The age of the car also plays a role. The older the car, the shorter the intervals between replacements should be. .

Replace or replace?

In principle, you can replace the diesel fuel filter yourself. However, there some restrictions .

• First, there must be a lifting platform or pit for the workshop , since only a few fuel filters can be changed directly from the engine compartment.
• It is also necessary to collect the escaping liquid .
• Probably the third difficulty concerns cars with diesel engines. . They must not draw air, so only the fuel filter needs to be filled with diesel before installation.
• Air in the lines should also be removed with a special pump. .

However, these devices are rarely available to hobbyists and amateur mechanics. Therefore, if you drive a diesel, the replacement of the fuel filter should be entrusted to the workshop.

Diesel filter replacement step by step

As mentioned above, here we will limit ourselves to replacement of the fuel filter in gasoline engines . And it's actually pretty easy to do.

1. Raise the car on a lift ( if the filter cannot be replaced from the engine compartment ).

2. Locate the diesel fuel filter.

3. Use a suitable wrench to loosen the fasteners.

4. Prepare a collection container.

5. Remove the fuel filter.

6. Install a new diesel filter.

7. Fill the fuel filter with fuel.

8. Be sure to fasten all the elements again.

Pay attention to the following points

In principle, replacing the fuel filter is very simple and straightforward. . However, you must ensure that you collect spilled fuel safely. It is also desirable to work in disposable gloves to avoid contact with fuel.

You must also avoid open flames at all costs while working. . If you do not have the necessary tools, never change the diesel filter yourself. This can result in engine damage and repair costs will outweigh the cost of replacing a fuel filter beyond comparison.

The cost of the diesel filter and its replacement

As a rule, fuel filters for almost all cars are easy to get . This means that visiting the workshop is not that expensive. You can replace the fuel filter on gasoline engines in less than 30 minutes .

Working with diesel engines takes a little longer , so you should expect a running time of just under an hour. Of course, the cost of the filter itself should also be taken into account. But the prices are quite reasonable. A new Bosch fuel filter usually costs around 3-4 euros, depending on the make of the car.