oil cooler
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New User
Joined: Jun 2006
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oil cooler
I am looking at a 6.9 diesel, the owner says he keeps getting water in oil and vise versa, and he says it keeps popping oil filter o-rings. He says the engine runs like a dream. I know the guy personally. Can this be an oil cooler problem? Should I walk away?
Elder User
Joined: May 2004
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From: Mirror, Alberta
Originally Posted by 63ranchwagon
I am looking at a 6.9 diesel, the owner says he keeps getting water in oil and vise versa, and he says it keeps popping oil filter o-rings. He says the engine runs like a dream. I know the guy personally. Can this be an oil cooler problem? Should I walk away?
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
63ranchwagon,
Welcome to FTE and the IDI diesel forum.
The water and oil intermixing is probably oil cooler O ring failure.
That is not to bad to replace them cost wise.
The oil filter needs to be installed hand tight and then tightened 1.5 to 2 turns tighter with a filter wrench. That should keep the filter O ring where it belongs. They leak bad if you use gas engine oil filter replacement methods on a diesel.
Welcome to FTE and the IDI diesel forum.
The water and oil intermixing is probably oil cooler O ring failure.
That is not to bad to replace them cost wise.
The oil filter needs to be installed hand tight and then tightened 1.5 to 2 turns tighter with a filter wrench. That should keep the filter O ring where it belongs. They leak bad if you use gas engine oil filter replacement methods on a diesel.
Posting Guru
Joined: Sep 2002
Posts: 1,897
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From: Northeastern Pa - USA
oil cooler
the oil gets into the crankcase by usually the oil cooler o ring failure or the internal cooler tubes leaking. That is a pretty easy fix. The coolant getting into the crankcase is from several problems: head gasket blown out, cracked head... these can be fixed with some repair or replacement. The coolant can also get into the crankcase from cavitation erosion ... the block has worn away from not using the proper additives in the coolant and internal erosion of the block itself ... ;can be fixed but requires a machine shop.
You might get really lucky and the problem is coming from the oil cooler as Dave stated.
You might get really lucky and the problem is coming from the oil cooler as Dave stated.
