Water in oil


Old 12-09-07, 05:06 PM
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Water in oil

What would be the most likely cause of water in the oil of a volvo 740? I do not know the histor of the vehicle. I know there could be sveral causes, like cracked head, cracked block, head gasket or what ever else. Maybe some one out there is familiar with this engine and could give me their opinion. I have done Mechanical work but am not familiar with this engine. Just trying to decide if it should go directly to the junk yard or to tear into it. Thanks for your help. Jordan
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Old 12-09-07, 05:13 PM
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I'm not familiar with that specific engine, but you hit the most likely failures. Could also be something like an intake or intake manifold gasket, depending on the design.

You could at least pull the head (or heads, that's a V-6?) and then take it from there. I would hold off on buying any parts until you do a little detective work.

Of course, depending on how long it was run in that condition you could have some bearings that are goners, too.
Old 12-10-07, 01:49 PM
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What led you to believe you have water in the oil? I wonder if the engine hasn't simply seen lots of short trips in cold weather and what you see may be the result of condensation in ther crankcase.

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