omc 140 oil shooting out from valve cover

M

mauiboy

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I got a omc 140 oil is shooting out from the valve cover breather hose
is it the head gasket that may be blown?
 
Bt Doctur

Bt Doctur

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Re: omc 140 oil shooting out from valve cover

more than likely excessive blow-by, do a compression and leakdown test first.
0 compression in a cylinder may be a holed piston
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

Thanks Ill do that also I forgot to say that the oil is milky
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

Thank you Sir
I did a comp test and 1,2,4 reads 140 cly 3 reads around 60
what can I do next?
 
danond

danond

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Re: omc 140 oil shooting out from valve cover

With the water-saturated oil, you have either a cracked head or blown head gasket. Time to pull the head and see what's up.
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

Thanks guys
I'll do that
 
danond

danond

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Re: omc 140 oil shooting out from valve cover

As a follow-up, since it's likely the engine froze and cracked from improper winter preparation, you may end up looking for a new block, too.

Keep your eyes open for other cracks in the block. Before you remove the head you can pressurize (5-6 psi) the cooling system and listen for air leaks, too. That'll tell you what broke.
 
Don S

Don S

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Re: omc 140 oil shooting out from valve cover

Was it milky oil or clean oil?
 
Don S

Don S

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Re: omc 140 oil shooting out from valve cover

mauiboy said:
Thanks Ill do that also I forgot to say that the oil is milky
Click to expand...

I looked for that and couldn't find it :rolleyes: :rolleyes:

Oh well, another Junk engine from cracked block due to not being winterized properly.

Too much water for anything else.
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

I checked the block and it appears to be good # 3 cly has rust around the walls and on the head of # 3 CLY LOOKS TO BE A SMALL CHIP . THE HEAD GASKET ALSO HAD A SMALL CRACK IN IT.

tHANKS ALL YOU GUYS FOR HELPING ME. DO YOU GUY THINK THAT WOULD HAVE CAUSED MY PROBLUM?
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

Oh Don S The Oil Was Milky
 
danond

danond

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Re: omc 140 oil shooting out from valve cover

What do you mean "appears to be good"? Post the results of your compression test.
 
Don S

Don S

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Re: omc 140 oil shooting out from valve cover

DO YOU GUY THINK THAT WOULD HAVE CAUSED MY PROBLUM?
Click to expand...

Absolutely not your problem. You have a cracked block. Pull the side covers that give you access to the lifters. You will see the cracks.
 
danond

danond

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Re: omc 140 oil shooting out from valve cover

Man am I glad I winterize the right way. All these cracked block posts. Makes me ill.
 
M

mauiboy

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Re: omc 140 oil shooting out from valve cover

yep when I pulled the manifold to the side I found the crack on the block
do any one know if i canuse a car motor and if i can what will fit my boat it is a 1977 omc 140

thanks all you guys at iboats
 
Gary H NC

Gary H NC

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Re: omc 140 oil shooting out from valve cover

Best bet is to use a new marine long block..
Car engines run different cams and steel core plugs...all of that would need to be changed out.
 
W

wca_tim

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Re: omc 140 oil shooting out from valve cover

danond said:
Man am I glad I winterize the right way. All these cracked block posts. Makes me ill.
Click to expand...

I've been thinking the same thing as I keep seeing the posts... hard way to learn about winterizing... wonder why so many this spring?
 
Gary H NC

Gary H NC

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Re: omc 140 oil shooting out from valve cover

wca_tim said:
I've been thinking the same thing as I keep seeing the posts... hard way to learn about winterizing... wonder why so many this spring?
Click to expand...

I think we have many more members that are new to boating.
They just did not know about how crucial a full winterizing is.

A have seen 3 boats this week with cracked blocks or manifolds.They were all new owners of older used boats that were JB weld patched.
I always hate to be the one to point it out to them...

On one that was a 3.0 Bayliner hand a whole handful of JB that was just globbed under the manifold and the side of the block..:eek:
 
I

IVAZ

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Re: omc 140 oil shooting out from valve cover

Man I'm glad I dont have to winterize at all. I'm sure I would have a cracked block by now. In 15 years there has been only like two times weather men thought we would have a hard freeze. It was advised in the news (yeah it made the news) that everybody should make sure to have the correct level of antifreeze in their car. Well the weather guys were wrong no cracked blocks or pipes in any houses.
You guys in the northern regions have it rough.
 
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