Function

• Filter impurities (iron filings, sand, water) in fuel to protect the injector and engine.

• Improve combustion efficiency, reduce fuel consumption, and extend engine life.

Types

1. External filter: installed in the middle of the oil pipe, easy to replace.

2. Internal filter: integrated in the fuel tank or fuel pump, requires professional tools to replace.

3. High-performance filter (such as carbon fiber): finer filtration, suitable for direct injection engines.

When to change?

• Regular change: every 30,000-50,000 km (refer to the maintenance manual).

• Early change:

o Weak acceleration, difficult starting

o Poor quality oil or water in the fuel tank

DIY replacement steps (external type)

1. Safety preparation: turn off the engine, unplug the negative terminal of the battery, and release the oil pressure (start the engine several times before turning it off).

2. Remove the old filter:

o Use a wrench to loosen the oil pipe buckle and catch the leaked fuel.

o Pay attention to the installation direction of the filter (marked with an arrow).

3. Install the new filter:

o Install it in the correct direction and ensure that the oil pipe is tightly plugged in and does not leak oil.

4.Check: Start the engine, observe whether there is oil leakage, and confirm that it is running normally.

Notes

• Do not use inferior filters: poor filtration may damage the injectors.

• Aging of fuel pipes: Fuel pipes of old vehicles are prone to cracking, so be careful when disassembling and assembling.

• Diesel vehicles: Some vehicles have drain valves, so drain the water regularly. 

Summary

Regularly changing the fuel filter can save fuel and protect the engine. It is low cost but has a great effect. If your car is not driving well, check it first!

Nanjing Dong Sun Tech Co., Ltd. as a professional automotive products company, we have established solid partnerships with customers worldwide, offering comprehensive products and premium services.

Contact US: www.dongsuntech.com