The timing case cover gasket 3681P046 is the working seal between the timing cover and the engine block, preventing contaminants out of the gear shaft area and ensuring an effective fluid seal, where symptoms of wear or failure include an oil or coolant leak. Every gasket is the same as used on genuine manufacturing and designed to ensure an effective sealing and a perfect fit. When the timing cover is removed to correct a leak, the timing components should be thoroughly inspected and replaced, if necessary.