Milky oil, ran it, then clear-problem?

[Rhadley]

A 140hp in-line 4 mercruiser I am looking at got a bit overheated due to the stern impeller going out. Compression (cold) in all cylinders was 145-150 before we ran it. 2 weeks pass, impeller was replaced, and I checked it out again. Oil looked a bit milky before the run, buy afterwards it seemed clear. Compression hasn't changed, boat seems to run strong at WOT. Do I have anything to worry about? Even if the headgasket is leaking, is it a big deal to replace it? <br /><br />Thanks

 

[Skinsk]

Re: Milky oil, ran it, then clear-problem?

Is the head gasket leaking?

 

[Hasbeen]

Re: Milky oil, ran it, then clear-problem?

Why would you even take the chance running an engine if the oil looked (a bit milky)to start with?? If the engine wasnt damaged to start with it may be now!!<br /><br />Sorry, just me!!!<br /><br />Hasbeen

 

[Rhadley]

Re: Milky oil, ran it, then clear-problem?

I don't know if the head gasket is leaking-how can you tell?<br /><br />As for running it after seeing milky oil, I didn't think it would damage the engine since I monitored the engine temperature closly. Is that an incorrect assumption?

 

[Trent]

Re: Milky oil, ran it, then clear-problem?

Milky oil is normally not a head gasket. Its a bad manifold or riser (sometimes a gasket). A good repair shop can pressure check.