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Q:

Why is oil mixing in my coolant on 2003 Cadillac DeVille DTS

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Coolant is muddy looking
(4) Answers
(1) Comments
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AGREE WITH BOTH #1 AND 2
is there oil in the anti freeze or anti freeze in the oil ,could be a bad oil cooler
Loosing coolant? Overheating or coolant just looks "muddy"?? Ever changed out the coolant since YOU have owned it?
SOUNDS LIKE A BLOWN HEAD GASKET. ON THAT TYPE OF VEHICLE ITS BETTER TO REPLACE ENTIRE ENGINE, THE BLOCKS ARE ALUMINUM AND SLEEVES FLOAT, IF YOU NEED MORE INFO, I HAVE A TEMP SOLUTION FOR THAT ON EMAIL US MOBILMECHANIC481@GMAIL.COM
Is there a temporary repair
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