1997 Chevrolet Venture Head Gasket Leak
My girlfriend has a '97 Venture van that was bought with a busted head gasket. My mechanic supposedly fixed it but I'm not sure. After having it for 6 months, a fan rubbed a big hole in the radiator while I was driving it. This caused it to overheat(peg out) before I could stop it at a gas station. The next day I came back with a gallon of water and stopped every mile or to allow it to cool. After getting the radiator fixed today, another mechanic tells me that I have either a busted head gasket or a cracked head. He explained how they knew(some test with a clear cylinder of blue liquid that turns yellow). The problem I have believing this is that the oil is still dark. Could the crack be so small that it hasn't changed the color of the oil? Another problem is that I DO have white smoke coming out of the tailpipe when I first start the van but after 5 minutes, there's no more smoke. Did my mechanic screw me on this?
Feb 8, 2007 at 12:43 PM
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The chemical test detects exhaust fumes in the coolant. So there are right that it is a head or head gasket.

Feb 8, 2007 at 7:35 PM
Suggested Repair
The combustion-gas test indicates exhaust in the coolant, so plan on a head gasket or cracked-head repair caused by the severe overheat. Also determine why the cooling fan rubbed through the radiator so the damage does not recur.
Conversation Summary
A 1997 Chevrolet Venture overheated after a cooling fan rubbed a hole in the radiator. A later chemical test that changed color indicated exhaust gases in the coolant, which the expert said confirms a head gasket or cylinder-head problem. Dark oil and brief white smoke at startup do not rule that out. The expert said the recent overheat, not the head-gasket work from six months earlier, most likely caused the current failure, and that blame is hard to assign without knowing why the fan contacted the radiator.
