Oil is getting into my Coolant. on 2004 Chevrolet Monte Carlo

I went to change my oil yesterday and realized i was about 2 quarts low. Then when i looked in the coolant reservoir I noticed it was real oily. I stuck a screw driver in it just to see and it seems to be oil. I dont know if my Manifold gasket is the issue?

by in Sharon, PA on July 07, 2014
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1 answer 6 comments
ANSWER by , July 07, 2014
Possible engine oil cooler ruptured.
COMMENT by , July 08, 2014
it doesnt have a oil cooler. i only have the 2 tranny lines going to radiator. Wouldnt there be 2 lines for the oil cooler going to other side of the radiator?
COMMENT by , July 08, 2014
Sorry that one has an external oil cooler, cooled by ambient air. Some other GM engines have the cooler in the engine valley under the intake that rupture, some V6 Cadillacs.
COMMENT by , July 09, 2014
Any other suggestions?
COMMENT by , July 09, 2014
Been really busy with diagnostics on many other cars this week. Trying to consider other options when time permits.
COMMENT by , August 04, 2014
fixed it was intake manifold gaskets
COMMENT by , August 06, 2014
Usually coolant in the oil with intake gaskets. Glad you found it.