Rubber Gasket OE278.080 Engine Rubber Sealing Gasket For Heavy Duty Commercial Diesel Truck Product Description This custom shaped rubber gasket is an essential sealing component for heavy duty commercial diesel truck engines. Made of high elastic oil resistant rubber, it is installed between engine mating surfaces to create a tight seal. It blocks oil coolant and gas leakage while stopping dust and debris entering the engine assembly. It can withstand continuous vibration