3.0 merc

[ISLAND MAN]

Gentleman, I have a 3.0 merc 1987 model motor I ran on muffs for 30 minutes and it got about a gallon of water in the oil. i have had the manifold and elbow off they looked fine I also had the head and head gasket off and replaced the head gasket. I also repaced the manifold gaskets when i had them off. this was done before i ran the motor last my questions is would a bad manifold or head or elbow put this much water in the oil and should i have them pressure tested before I worry about the block. Also this may sound stupid but is the risers as same as the elbow?

 

[DJ]

Re: 3.0 merc

Island Man,<br /><br />I would certainly condem the manifold and/or riser before I condemed any part of the engine. <br /><br />You can't always tell by looking at them if they are bad.

 

[Trent]

Re: 3.0 merc

Im with djohns...Riser is the first to go then the manifold. Pressure check or just replace them both since its this old.

 

[Bondo]

Re: 3.0 merc

I don't know Guys.... I see Frost damage to the block.... At the bottom of the water jacket, on the manifold side, in behind the drainplug.....<br />I don't see water getting to the oil pan With the engine running for 30 minutes... The manifold, or riser(elbow) will allow water into the cylinders,+ eventually to the base, but not while running....<br />It would be nice if it was the manifold/riser, But I really doubt it....

 

[ISLAND MAN]

Re: 3.0 merc

Guy,s it was the manifold i just got back from a test drive it ran like a it ran like a scolded dog. Thanks alot!