Oil filter, also known as oil oil grid. Used to remove impurities such as dust, metal particles, carbon deposits, soot particles and colloids in engine oil to protect the engine.

Oil filter, also known as "oil oil grid". Used to remove impurities such as dust, metal particles, carbon deposits, soot particles and colloids in engine oil to protect the engine.

Composition and characteristics of oil filter:

1. Filter paper:

Oil filters have higher requirements for filter paper than air filters, mainly because the temperature of the oil varies from 0 to 300 degrees. The filter paper of a high-quality oil filter must be able to filter impurities under drastic temperature changes. Ensuring sufficient traffic.

Note: Low-quality and low-cost filter paper is mostly made of cotton pulp paper, which has a very poor filtering effect. It is easier to decompose and dissolve in engine oil, clogging oil passages, accelerating the deterioration of engine oil, and even without a filter element, it will accelerate engine damage.

2. Rubber seal:

The high-quality oil filter seal ring is made of special rubber to ensure 100% oil-free.

Note: A good oil filter will not leak oil under normal installation conditions. There are many problems with low quality and low oil spills.

3. Backflow suppression valve:

Only available in premium oil filters. When the engine stalls, it prevents the oil filter from drying out; when the engine is re-ignited, it immediately generates pressure and supplies oil to lubricate the engine. (Also known as check valve)

Note: Keep the engine lubrication system pressure and reduce wear. Low-quality, low-cost oil filters have no check valves, accelerating wear when the engine starts.

4.Relief valve:

Only available in premium oil filters. When the external temperature drops to a certain value or when the oil filter exceeds its normal service life, the relief valve will open under a special pressure, allowing the unfiltered oil to flow directly into the engine, lubricating the friction parts—not Filtered impurities increase engine wear. Therefore, the relief valve is the key to protecting the engine in emergency situations. (Also known as a bypass valve)

Note: Change the oil filter regularly (you need to change the oil filter every time you change the oil) to avoid accelerating engine wear due to the overflow valve opening. Low-quality and low-cost machine filters do not have relief valves. In special cases, no lubricant supply will lead to the launch of cylinders, overhauls, and even scrap.

About the problem of oil leakage after replacing the oil filter:

1. For the spin-on filter (iron shell), the rotation force is too large, exceeding the standard 20-60 Newtons (1 kg = 9.8). The correct installation is to use 2 kg hand torque, and never use a wrench to install and rotate After the force is greater than 2.5 kg, it is easy to cause deformation of the seal ring, and a protruding point is generated along the circumference. Under the impact of high-pressure airflow, a gap is generated and leaks.

2. The flat dirt in contact with the old oil filter is not cleaned.

3. When disassembling the old oil filter, the old seal was stuck on the filter seat due to the excessive rotation force in the previous time, and the new oil filter leaked oil after being installed.

4. The lubrication system is seriously polluted, heavy oil scales block the main oil channel (or the sealant blocks the oil channel after overhaul), causing internal pressure and impacting the sealing ring to cause oil leakage.

5. For the environmental protection filter (paper filter), most of the sealing rings in the guide rod are not removed, and new ones are installed.

6. The environmental protection filter (paper filter) is not replaced with a new inner seal when it is replaced.

7. The environmental protection filter element (paper filter element) still has too much rotational force for the outer seal ring (large), causing serious deformation or hidden injury, and being shocked and leaking oil under pressure during work.