S42 and GT22 Cover Seal OS28214000 - O.S. Engine  [OS28214000]

Long-Lasting Cover Seal for S42/GT22

The O.S. Engine cover gasket listed as OS28214000 is a service replacement designed for S42 and GT22 engine covers. It creates the seal between cover and crankcase to maintain compression and limit fuel or oil weep during use and bench inspections.

Replacement is straightforward: remove any remaining gasket material, check the mating faces for damage, position the OS28214000 correctly over the cover ports, and tighten the screws in the recommended pattern and torque range from the engine documentation. Avoid overtightening and inspect the gasket for any deformation before final tightening.

Using a sound gasket reduces the chance of unpredictable running by preserving compression. If the gasket shows signs of ageing, cracking, or if you detect leaks or low compression on the bench, swap in a new OS28214000 and then confirm engine settings during follow-up checks.