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CATEGORY LISTINGS > JOHN DEERE > engine oil in coolant [ REFRESH ]
Thread Title:

engine oil in coolant


Created On Saturday October 10, 2009 04:05 Diesel Talk
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stubby44
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Note Saturday October 10, 2009 04:05 View thread in raw text format
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HI GUYS.
Iv got a JD 8420 6 cylinder with a helluva lot of engine oil in the rad.
Cooler is ok. Head gasket was ok and all looks good.Not been overheated etc.
No water in oil.
What do you think?
Has anyone had issues with water pump letting this happen?
Or any other thoughts on it.....

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headcase
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youngdiesel
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Note Saturday October 10, 2009 16:52 View thread in raw text format
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Is there coolent in the oil ? sure the cooler is ok ? sounds like the cooler .
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stubby44
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Note Monday October 12, 2009 07:01 View thread in raw text format
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No coolant in oil.
Cooler has been replaced and both old and new coolers pressure tested.
Im baffled!!

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headcase
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oldmandiesel
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Note Monday November 02, 2009 20:00 View thread in raw text format
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What engine is in this machine. 6.8 or 8.1 Power tech or if a common rail engine there would be other places to check?? We usually change the Oil cooler and o-rings and gaskets .Remove the thermostat run threw a cleaner. Cannot rule out liner o-rings,seen this years ago changing everything,and finally changed o-rings,it can happen.

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Always keep moving forward.
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stubby44
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Note Monday December 14, 2009 09:52 View thread in raw text format
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Appologies for not getting back to you. its common rail. We ended up thinking this problem was down to sabotage although Im not convinced. Absolutelly no coolant in oil left us totally baffled. We gave it a thorough flush out and ran it for a long time with no apparent oil leaking into the coolant.
Very strange.....

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headcase
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jonboy69er
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Note Tuesday April 13, 2010 19:12 View users profile View thread in raw text format
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Check the water pump. There a hole in the back top of pump, and the gasket could be blown..

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Have owned and run a truck repair shop for over 30 years. And still do.
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Phil1010
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Note Sunday January 09, 2011 19:35 View thread in raw text format
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I have a 1956 4 cyl that gets water in teh oil and compression in the rad. from teh turbulance chambers seal at teh head . Just like a crakced head but it's not the head the injector pre cup or they call it the turb. chamber/ Phil

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forgiven
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