My 98 Cadillac Seville is overheating already replaced thermostat as well as house water pump

Asked by Oct 27, 2016 at 11:59 PM about the 1998 Cadillac Seville STS FWD

Question type: Maintenance & Repair

I replace my water pump in my thermostat in my 98
Cadillac Seville I got a oil change and park my vehicle came
back to it a few days later noticed that I had radiator fluid
all over the floor so I replaced the water pump and then
replace the thermostat ran the car and I noticed that it was
going a little bit over the halfway mark also I noticed that
there is only cold air blowing out of the vents when it on 90
degrees can anybody tell me what is wrong with my vehicle
it has 148000 miles on it the oil is not milky

1 Answer


There may be air in the system. But if you have a Northstar it's going to be the head gasket. Especially at that mileage. To confirm this have the cooling system tested for exhaust gases. HTH. -Jim

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