Oil filter, also known as oil grid. It is used to remove dust, metal particles, carbon deposits and soot particles in engine oil and protect the engine. When the engine is running, with the operation of the oil pump, the oil with impurities enters the oil filter from the oil inlet on the bottom plate assembly of the oil filter, and passes through the check valve to the outside of the filter paper for filtering. Under the action of the oil pressure, the oil continuously passes through the filter paper and enters the center tube, while the impurities in the oil remain on the filter paper.

The function of the oil filter is as follows：