Loosing 2 gal. of coolant about every 30 miles.
Cadillac Q&AAsk Your Question
1995 Cadillac DeVille Question: Blown head gasket Northstar 4.6L
Answer #1mastertech6371 April 12, 2011, 12:15Master
the more you drive it, the more damage you do to the motor.
you need a shop to do a leak down test to confirm the number of cylinders effected by the failure. then they can give you a bid based on ther results.
then after this is done, they need to find the original issue as to why it overheated. the head gaskets are a result of the overheating not the reason for overheating.
it will be costly to the point that it may require a new or rebuilt motor.
thanks for using repairpal
Answer #2Visitor, April 22, 2011, 18:10
This could always be your timming cover gasket that needs to be replaced.