1976 Omc 235

[guywhalen00]

I've got a small amount of water in my oil. I've had a few different people tell me that it's my upper seal set and I've had another person tell me that my exhaust manifold may be cracked internally. I'm a diesel mechanic not a boat mechanic so this all new to me. It has a 351w and a stern drive.

 

[Haut Medoc]

Re: 1976 Omc 235

Welcome to iboats.....
I'm not an OMC guy, but.....
I would run the engine, immediately remove the plugs, crank it & see if any water comes out....
It is common for a bad exhaust manifold to allow water to seep in through an open exhaust valve, then seep past the rings into the oil.....​

 

[guywhalen00]

Re: 1976 Omc 235

Thanks I'll try that tonight.