Caterpillar 4N1684 Gasket

Caterpillar 4N1684 is an OEM general-use cylinder block cover gasket for CAT equipment, molded in rubber with a nominal thickness of 0.8 mm to provide a precise seal between the cylinder block cover and the engine. This 4N1684 gasket is designed to prevent oil leaks in heavy‑duty Caterpillar installations and is cataloged by Caterpillar as a direct replacement for the cylinder block cover seal. Built from rubber, the gasket is formulated for compatibility with typical engine oils and operating environments found on CAT machines, supporting reliable sealing during routine maintenance and service. Common applications include CAT-engine cylinder block cover assemblies in construction and mining equipment that rely on Caterpillar powertrains, where a general-use gasket is specified by part number 4N1684.