Oil Filter Cap 04E103485B

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An oil filter cap in a car

The oil filter cap in a car is an essential component of the engine's lubrication system. It is designed to securely hold and seal the oil filter in place. The primary function of the oil filter cap is to protect the engine by filtering out impurities, such as dirt, metal particles, and debris, from the engine oil. It ensures that only clean oil flows through the engine, preventing damage to crucial engine components.

In addition to holding the oil filter, the oil filter cap also plays a role in maintaining proper oil pressure within the engine. It features a built-in pressure relief valve that allows excess oil pressure to escape. This helps to prevent damage to the engine's oil filter and other parts, as the relief valve ensures the oil pressure remains within optimal levels. The oil filter cap is typically made of durable materials, such as metal or high-quality plastic, to withstand the high pressures and temperatures within the engine.