coolant on 2005 Cadillac STS

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.

by in Williamsburg, OH on March 12, 2010
1 answer
ANSWER by on March 12, 2010
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
1 person likes thisFlag inappropiateReply
Related Items:
...I had a water pump failure and swapped it out in the middle of the winter. I replaced the lost coolant at the end of the swap like normal but soon after I realized that my heat had diminished even...
1994 Cadillac STS ...If i were to run water from a hose through my coolant system, it would all pour out on the ground as fast as it goes in (roughly from under the wate...
replaced water pump twice, replaced gasket, still have leak
Engine Hot - AC Off
Does enitre water pump have to be replaced?