oil/water mix

[screwy]

1997 Crestliner Sportfish Volvo 4.3SX gas/freshwater. I have water entering the crankcase and mixing with oil; enough to fill the crankcase to the top of the rocker covers. Found the raw water pump impeller to be damaged and replaced it. Drained crankcase and refilled with fresh oil. Ran with cuff/hose at idle until nearly warm. Crankcase again filled with oil/water. Checked raw pump-OK. There is no oil cooler. Removed exhaust manifolds/exchangers to inspect. Not sure how to test. Had boat from new. Low hours(under 75). Stored heated indoors in winter(US Great Lakes area). Not sure where to go from here. Boat runs well(not smoking or missing);there was water in two cylinders(one each bank) when spark plugs were pulled from first filling.

 

[tommays]

Re: oil/water mix

the manifolds need a pressure test to check for leaks<br /><br />your getting a huge amount of water in the motor very fast on both sides i would check the full exaust down to the out drive it sounds like somthing is not letting the water out<br /><br />tommays

 

[jlshields]

Re: oil/water mix

greymare, do a compression check. I think you'll find 2 adjacent cylinders with bad numbers. I would suspect head gasket. It would be hard to get that much water into the crankcase in that short time if it were exhaust manifold.

 

[Galloping Ghost]

Re: oil/water mix

definitely head gasket i think.

 

[Blk-n-Blu]

Re: oil/water mix

gray, Have a look at this article:<br /> http://www.marinemechanic.com/site/page88.html

 

[tommays]

Re: oil/water mix

i talked to a friend in a engine rebuild shop and he felt that in the best case it would be a gasket and in the worst case due to how fast the water is getting something has cracked from freezing<br /><br />tommays