A-742474M1-AI Gasket, Timing CoverOne New Aftermarket Replacement Timing Cover Gasket Fits Massey Ferguson Tractors with Perkins 4 Cylinder Engine This aftermarket replacement timing cover gasket seals the timing gear cover to the engine block on Fits Massey Ferguson tractors equipped with the Perkins A4. 236 and A4. 248 4 cylinder diesel engines. Replacing a worn or damaged timing cover gasket prevents oil leaks at the front of the engine and is recommended any time the timing cover