water in oil

[foresteronw]

I have read numerous posts about water in the oil. I have a couple more questions that I am not sure about. I have a 1989 OMC 5.7, Thru Hull Exhaust, 4bbl Quadrajet. <br /><br />I believe I have water in my oil due to the fact that there is a milky brown substnce under my valve covers. The big mystery is that there is no evedence of it in the oil pan at all. I have changed the oil and it came right back after a couple hours of running. Again though it was not in the oil pan, just under the valve covers. I also have one spatk plug on each side that is a little rusty. When you are looking at the engine from the front side, it is the rear one on the right hand side. Engine runs great, doesn't miss a beat. When I bought the engine the previous owner only used it about ten hours in the one year he owned it. I have been told by several mechanics that it is most likely just condensation in the oil due to lack of use. Also the heads were re-done about 15 hours before I bought the boat. ANy help would be appreciated.

 

[johnkc]

Re: water in oil

make sure you have a thermostat in it, 140 degree.

 

[foresteronw]

Re: water in oil

i did notice that when I run it on the hose after ten minutes it doesn't feel warm at all. I can still grab the manifolds and they are not hot, just a little bit warm. So do you think that if the thermostat is bad it could cause this? What about the spark plug?

 

[Bondo]

Re: water in oil

Sounds like a possible water leak on the exhaust side of the motor....<br /> manifolds,+ or risers...<br /> Their just starting to leak....<br />running on the hose will Never build enough heat to get things "Warmed Up"....<br />the rust on the plug is on the "Hot" end isn't it?? That's where the water is laying... in the lowest cyl....

 

[magicbandit]

Re: water in oil

I'm with Bondo.<br />I've been there, done that. I had that same problem on the two back cylinders on my 454.<br />Keep us posted!!!!<br /><br />Mike (AKA Jazzy)