Over heating car

engines

#1

I have a 98 Buick Century, with about 250k miles on it. Recently when I first start the car and drive a few miles the temperature gauge keeps rising until it is in the red zone and a warning light comes on. When I pull of to the side of the road after a bit it begins to slowly drop and I can begin to drive again. The gauge will then normally stay a bit above halfway for the remainder of the trip, the gauge has sometimes done a bit of jumping around between 3/4 and half sometimes though. The only work that I have had done on it recently is to have some work done on the ac system. Just wondering if anyone could help me find out what is going on.
Thanks


#2

First thing is to check the level of coolant to make sure it is ok. Then it could be a sticky thermostat, or heaven forbid a head gasket which is not something you want to do.


#3

My vote is on a sticky thermostat. And, if has been a few years since the cooling system was serviced, I’d do a complete coolant drain-n-fill with a rinsing of the radiator and new thermostat and radiator cap. Also, it would be an ideal time to inspect heater and radiator hoses, replacing any that look suspect.