It may be that the sealing gasket is cracked and not tightened during installation, or it may be too tightened, causing the shell to crack. The oil filter base gasket leaks oil, which is easy to cause the oil and antifreeze to string. It will cause a large amount of water to enter the engine oil and also a large amount of oil to enter the antifreeze, which will lead to the failure of the engine cooling system and engine lubrication system. Continued driving will lead to very serious consequences such as engine cylinder pulling and axle holding.

It may be that the sealing gasket is cracked and not tightened during installation, or it may be too tight, causing the shell to crack. This is the normal situation.

Oil filter element: during engine operation, metal wear debris, dust, carbon deposit oxidized under high temperature, colloidal sediment, water, etc. are constantly mixed with lubricating oil.

The role of the oil filter is to filter out these mechanical impurities and gums, keep the lubricating oil clean and extend its service life. The oil filter shall have the characteristics of strong filtering capacity, small flow resistance, long service life, etc. In general, several filters with different filtering capacities are installed in the lubricating system - filter collector, coarse filter and fine filter, which are respectively connected in parallel or in series in the main oil passage. (The one in series with the main oil passage is called full flow filter, and all lubricating oil is filtered by the filter when the engine is working; the one in parallel is called split flow filter). One coarse filter is in series in the main oil passage, which is full flow type; The secondary filters are connected in parallel in the main oil passage and are of split flow type.

Technical features of oil filter
● Filter paper: The oil filter has higher requirements for filter paper than the air filter, mainly because the temperature change of the oil varies from 0 to 300 degrees. Under the severe temperature change, the concentration of the oil changes correspondingly, which will affect the filtering flow of the oil. The filter paper of high-quality oil filter can filter impurities under severe temperature changes to ensure adequate flow.
● Rubber seal ring: the filter seal ring of high-quality engine oil is made of special rubber to ensure 100% oil leakage.
● Backflow inhibition valve: only available in high-quality oil filter. When the engine is stopped, it can prevent the oil filter from drying; When the engine is re ignited, it immediately generates pressure and supplies oil to lubricate the engine.
● Overflow valve: only available in high-quality oil filter. When the external temperature drops to a certain value or when the oil filter exceeds the normal service life, the overflow valve will open under special pressure, allowing unfiltered oil to flow directly into the engine. In spite of this, impurities in the oil will enter the engine, but it is much smaller than the loss caused by no oil in the engine. Therefore, the relief valve is the key to protect the engine in emergency.

Installation and replacement interval of oil filter
● Installation:
a) Drain or suck up the old engine oil
b) Unscrew the fixing screws and remove the old oil filter
c) Coat the sealing ring of the new oil filter with oil
d) Install the new oil filter and tighten the fixing screws
● Recommended replacement cycle: cars and commercial vehicles are replaced every six months

The automobile requires the filter precision of the oil filter to filter out all particles>30um, reduce the particles entering the lubrication gap and causing wear (<3um-30um), and the oil flow meets the engine oil demand. The replacement cycle is long, at least longer than the service life (km, time) of the engine oil. The filtering accuracy meets the requirements of protecting the engine and reducing wear. Large ash capacity, suitable for harsh environment. It can adapt to higher oil temperature and corrosion. When filtering engine oil, the lower the differential pressure is, the better, so that the engine oil can pass smoothly.