Appearance: the appearance of delicate, rough points
False oil filter on the surface of the shell is relatively rough printing, the font is usually blurred. Really oil filter surface of the standard font is very clear, and the paint on the surface texture is very good. Careful friends through the comparison is still relatively easy to see the difference between the.
Filter paper: the filter capacity of the points
Fake engine oil filter impurities ability is poor, which is mainly reflected on the filter paper, filter paper will affect the oil normal circulation; and filter paper too loose will lead to a lot of that has not been filtered impurities continue with the oil flow, a long time will lead to dry friction or excessive wear of the internal parts of engines.
Bypass valve: the auxiliary role of the sub
The function of the bypass valve is to use a device that is used for emergency transport of oil when filter paper is blocked due to excessive impurities. However, most of the built-in bypass valve of the oil filter is not obvious, so when the filter paper is invalid, the oil can not be transported in time, will lead to the engine parts dry friction.
Gaskets: seal, oil seepage points
Although the gasket seems to be somewhat obscure, but the seal between the parts to rely on it. False oil filter gasket material is relatively poor, in the engine high temperature, high strength work is likely to cause its sealing failure, and ultimately lead to leakage of oil.