Caterpillar 1W-1898 Gasket

Caterpillar 1W-1898 Timing Gear Housing Gasket is the authentic Cat part that seals the timing gear housing on Caterpillar 3400-series engines. This OEM gasket sits between the timing gear housing and the engine block to prevent oil leaks in the timing area and to maintain proper lubrication around the timing gears. The 1W-1898 designation is cataloged by Cat's Parts Store and is commonly cross-referenced to PAI 331400 by aftermarket suppliers, helping technicians confirm correct replacement in manuals and cross-reference catalogs. Designed for service of the timing gear area, it preserves the integrity of the timing cover seal and supports the correct clearance and sealing surface finish required for reliable engine timing operation. Listed as 1W-1898, this gasket is associated with Caterpillar 3400-series engine applications, making it a typical choice for timing-cover maintenance and overhauls where a dedicated timing gear housing seal is needed. Being an authentic Cat component, it is manufactured to Caterpillar specifications to ensure proper fitment with the timing gear housing, block mating surfaces, and accompanying hardware. This gasket's role is to restore factory sealing performance and help guard against oil seepage in the timing region after gasket replacement.