water in the oil

I am looking at buying a 1989 vip boat with a omc 4.3 cobra inboard engine.but it has water in the oil.What is the most likely cause?

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Sep 08, 2014
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Replace the heads.
by: Bill

I had the same problem on my 350 io. The water chambers in the heads are very close to the exhaust chambers and not very thick. When the heads get worn out they can rust through allowing water to enter the engine. I would replace both heads and if you use used heads off a car or truck, be sure to change the plugs on the side of the heads to brass.

Jan 04, 2014
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water in the oil
by: Anonymous

make sure you find out before you buy or get the priced reduced greatly, it could be a head gasket, a cracked head (costly), or a cracked block (very costly)

Nov 04, 2013
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probable Problem
by: Anonymous

Sounds like blown head gasket...does it over heat also?

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