This engine oil filter removes contaminants from the engine lubrication circuit before oil reaches the main bearings and turbocharger. It is mounted on the engine block and receives oil from the pump; trapped particles protect the crankshaft and connecting-rod journals from abrasive wear. A restricted filter element causes the bypass valve to open, allowing unfiltered oil to circulate, which accelerates internal engine wear. The original manufacturer produces the filter to match the housing's thread pitch and seal-groove dimensions, ensuring the bypass valve seats correctly and no oil bypasses the element. Replace the filter at the interval specified in the engine maintenance schedule.