Cm2250 oil leak driver side behind air compressor?

[Starlight]

(01-04-2017 )Waterloo Wrote:  Could be your upper housing/cover, on the front of the motor. There is an O Ring gasket behind that front cover. The cover that sits behind the engine fan, where your cam gear/timing chain is located. These leaks are funny, I had one on my fresh in frame motor, lower cover, long story, but the dealer fixed at no cost. OR, the seal at your cam is leaking. No way to check without tearing apart a few things. But, those leaks usually appear at the top of the motor, at least on the CM-870 and 871 motors... You have one cam, but something to look at. No idea how to check, but I would know one if I saw one. I had this issue on my 870, wish Rawze would have been around back then.

The 2250 engine has this adapter cover plate bolted in place where the injector cam is located in a 870 or 871. That plate is o ring sealed. With a higher miled engine those o rings flatten or square out and then the sealing pressure of the oring is lost resulting in a leak. Fairly certain thats what you have going on there. Once you pull it apart you'll see the oring fairly hard and flat. Waterloo is right on. It actually is easy to see as the lower part of that cover plate is visible from the outside. But then again it could be gear housing to block gasket. Hopefully not as that is a fairly big job.