1992 Merc 3.0 Oil on manifold after head gasket change

[Bayliner1992]

Hey Lady's gents, Captains ETC.

I had a issue a year ago which i lost power on the 1992 Merc 3.0 inboard! it turned out to be a busted head gasket, well that was changed and now i have oil on the manifold by the valve cover, I removed the valve cover and installed new gasket and i still have the leak, i really dont know where its coming from! can it be coming from the head gasket? this is puzzleing, i have full compression on all cylinders so where is the oil leaking from? any help will be greatly appreciated.....

 

[Haut Medoc]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

You will need to clean it up & keep a close eye on it.....
The valve cover gasket is still the culprit....
Is the cover bent at the bolt holes?...
Over torquing the bolts will make it leak, the value is inch pounds, not foot pounds...
It isn't the head gasket......

 

[Bayliner1992]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Thanks Haut, I will have it changed again, maybe i should just get a new valve cover as well ! what do you think...?

 

[Haut Medoc]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Hard to say without seeing the old one, worth a shot......
If the bolt holes are smooshed, it is probably the culprit...
However, I would still try to locate the leak before I threw parts at it....

 

[Bayliner1992]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Thanks again!

 

[Bayliner1992]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Thank you Bubba! I am actually looking for a new valve cover anyway since thats the only thing that is not new on the engine, can anyone point me in the right direction to where i can find a valve cover and a new gasket? again it a Mercruiser 3.0 1992 4 cylinder, i searched and cant find no where to purchase one, thanks in advance any links i would appreciate.

 

[Bayliner1992]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Does any one have the item number for a valve cover or is it call a block cover for the 1992 3.0 mercruiser?

 

[Bondo]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

Ayuh,... Valve covers rarely go Bad,... But if you Really want a New 1,... Call Mercruiser....

Oil leaks aren't all that hard to Find,+ are usually pretty Easy to fix...
The process starts with cleaning up most of the leaked oil,...
Run the motor,...
Then,...
LOOK to see exactly Where it's leaking...
Oil,.. Like water flows Downhill...
Fresh leaked oil is shiney,... old leaked oil ain't....
So,...
Look Up to the top of the oil leak, where the shineyest newest oil is,+ the Leak is Just above there....

or is it call a block cover

No,... Those are down on the side of the block on the starboard-side....

i lost power on the 1992 Merc 3.0 inboard! it turned out to be a busted head gasket, well that was changed and now i have oil on the manifold by the valve cover,

Ayuh,... My WAGuess is,...
When the motor was Beaten hard enough to cause the Headgasket Issue,...
It also burnt up the Rings....
Now it's Blowin' Oil out the crankcase Vent.....

 

[Bayliner1992]

Re: 1992 Merc 3.0 Oil on manifold after head gasket change

AHHH I don't think so, like the first gentleman said gasket was needed to be changed, no burnt rings all i said there was oil leaking.. thanks