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2005 Cadillac STS

Question: coolant

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jack4556, 4.6L V8, Williamsburg, OH, March 12, 2010, 11:44

 Rookie

I have a 1997 sts seville. When i drive for awhile i seem to be loosing coolant. If i drive for an hour it usually needs about a gallon of coolant. I cant find a leak or anything anywhere. Oil looks fine and i never find anything under car or in motor compartment.

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• Answer #1

  427Chevy March 12, 2010, 15:49
  

   Journeyman

  You probably have a blown head gasket, check the oil to see if there is a tan to brown milky substance on it and if it does the head gasket will need to be replaced. you can get an estimate here www.repairpal.com/estimator and find a shop here www.repairpal.com/directory
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