You put oil on an oil filter gasket to prevent it from seizing or sticking to the engine block during installation and removal, not just to ensure a good seal.
Here's a breakdown of why lubricating the oil filter gasket is crucial:
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Prevents Seizing/Sticking: The primary reason is to prevent the rubber gasket from bonding to the metal surface of the engine block (oil filter adapter housing). When the engine heats up, the rubber can essentially weld itself to the metal. Applying a thin film of fresh engine oil to the gasket creates a barrier that prevents this bonding from occurring.
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Ensures a Proper Seal: While preventing sticking is the main benefit, the oil also helps the gasket seat correctly during installation. It allows the gasket to compress evenly against the sealing surface, creating a tighter, more reliable seal.
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Easier Installation and Removal: A lubricated gasket allows for easier tightening of the oil filter during installation. More importantly, it makes removing the old filter much easier during the next oil change. Without lubrication, the gasket can stick so tightly that removing the filter becomes a struggle.
In summary, lubricating the oil filter gasket is a crucial step in oil filter installation. It prevents the gasket from sticking to the engine block, ensures a proper seal, and makes future removal easier. Skipping this step can lead to difficulties and potential damage during your next oil change.
