overheating on 1999 Cadillac Catera

99 cadillac catera overheated and water that come out of resevoir left an oily residue. Blown head gasket?

by in Kenedy, TX on June 08, 2010
2 answers 1 comment
ANSWER by on June 08, 2010
very likely. get it leak down test to confirm. Roy
COMMENT by on June 08, 2010
Is this something I can do or do I have to take it to a mechanic to get it tested.
ANSWER by on September 01, 2010
Bad coolant/oil heat exchanger. Common problem.
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