122-0502-C, C20577 Onan Oil Filter Sealing Grommet To Heat Shield Replacement Oil filter sealing grommet to heat shield.
THE Onan Cummins OEM seal has been on national back order and we do not know if and when it will be back in stock. BUT AS ALWAYS WE HAVE FOUND A SOLUTION FOR YOU! We have Quality seals that are good and thick and fit the OEM Oil filters Nicely
The oil filter grommet on your opposed twin Onan is critical. This grommet can save your motor. The design of the engine cooling requires that this grommet is in place to keep the cooling air from escaping around the filter housing; that tin gap needs to be filled with this part. With this grommet missing it is very common for catastrophic engine failure, we see this very often. The most common failures are loose or bad valve seats, piston or head damage, and often broken connecting rods. Chances are if there is a failed Onan engine with an oil filter, the bad cylinder 85% of the time is on the oil filter side and this grommet is missing.
OPTION- We have also found a nice seal that we call the delux version and forms a real tight seal and is bigger over all than our new seal version or the OEM one.
Reviews
Thanks for the oil change video. When I bought my 4020PS a few months ago this seal was missing. I never knew there was a heat shield on this unit. Now I know! Ordered, received and installed. Great service as always.