Mercruiser 485 Oil leak?

[billywhizz]

i have 1983 485, there seems to be oil leaking from under the inlet manifold? any ideas?

 

[havasuboatman]

Re: Mercruiser 485 Oil leak?

Do you mean the intake manifold? (the thing the carburator is bolted to?)

 

[Bondo]

Re: Mercruiser 485 Oil leak?

any ideas?

Ayuh,... LOOK to see where it's coming from,...
Oil, like water, flows Downhill....

 

[billywhizz]

Re: Mercruiser 485 Oil leak?

Ayuh,... LOOK to see where it's coming from,...
Oil, like water, flows Downhill....

Tried that, cant see, thats why i asked for any adeas?

 

[billywhizz]

Re: Mercruiser 485 Oil leak?

Do you mean the intake manifold? (the thing the carburator is bolted to?)

yes intake manifold

 

[guyaverage]

Re: Mercruiser 485 Oil leak?

You can check your valve cover gasket, but oil leaks on that side of the engine are usually from a bad intake manifold gasket, or the side cover gasket. The side cover is the long bolted plate right under the intake manifold. Neither gasket is expensive, and both are fairly easy to replace. Use a very, very thin layer of RTV on the intake manifold gasket if you do replace it. The intake manifold bolts get torqued to 25 lb ft (34 Nm), and the side cover bolts get torqued to 15 lb ft (20 Nm). Good luck.

 

[billywhizz]

Re: Mercruiser 485 Oil leak?

You can check your valve cover gasket, but oil leaks on that side of the engine are usually from a bad intake manifold gasket, or the side cover gasket. The side cover is the long bolted plate right under the intake manifold. Neither gasket is expensive, and both are fairly easy to replace. Use a very, very thin layer of RTV on the intake manifold gasket if you do replace it. The intake manifold bolts get torqued to 25 lb ft (34 Nm), and the side cover bolts get torqued to 15 lb ft (20 Nm). Good luck.

What a superb and informative reply to my question, you could not have given more detailed advice, which was all I asked for, obviously a very knowledgable young man! be sure to jump in whenever you can with answers like that. grateful thanks.