My Buick century keeps overheating

Asked by Whopper Dec 05, 2016 at 06:28 PM about the 1998 Buick Century Limited Sedan FWD

Question type: Maintenance & Repair

I changed the water pump I changed the
thermostat I changed my radiator and
smoke is coming from somewhere under
the engine idk where it's coming from

1 Answer
103,445

KenF answered 8 years ago

After changing hoses and a radiator you have to make certain to get all the air bled out of the system, trapped air can prevent good flow. If you're positive air is out, you may want to check for combustion gases in the coolant - a sign you have a blown head gasket. Use a product like Block Tester to check for those gases. A blown head gasket overheats and over-pressurizes the cooling system, it could also explain the 'smoke,' if you have coolant dripping onto an exhaust header.

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