This engine oil filter removes particulate and combustion byproducts from the lubricating oil before it circulates through the engine's bearing surfaces and oil galleries. It mounts to the engine block via the threaded center port, and the full-flow design passes all oil from the pump through the filter media during normal operation. A clogged filter forces the internal bypass valve open, allowing unfiltered oil to reach the crankshaft and connecting-rod bearings, which accelerates wear. The manufacturer machines the sealing face and thread to match the housing's original specifications, ensuring the bypass valve seats correctly and the gasket compresses evenly. Replace the filter at the interval specified in the engine maintenance schedule, and lightly oil the gasket before hand-tightening to the housing.