2003 buick century overheating issues

Asked by Apr 25, 2019 at 02:47 PM about the 2003 Buick Century Custom Sedan FWD

Question type: Maintenance & Repair

I have a 2003 Buick Century and i have replaced
the temp sensor and the thermostat and i am still
having overheating issues. When i opened the
radiator cap there is gray sludge on it. I wanted to
replace the radiator and the water pump along with
the gaskets and hoses (of course). I dont want to
spend unnecessary money if it wont fix the
problem. Does anyone have any suggestions?

1 Answer


The sludge is probably engine oil or transmission fluid. If engine oil, you have a blown head gasket or another defect in the engine. If trans fluid, it's probably leaking from a rotted out trans cooler. Fix this before you try anything else; the price to fix might exceed the value of the car.

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