and I just recently changed the thermostat in it. The temperature gauge is right where it should be so it is not overheating. When I took the radiator cap off it was full of gunk. I am wondering if I should replace the cap? What could be wrong with it.
Buick Q&AAsk Your Question
1999 Buick Century Question: My car will not defrost and blows out cold air. There is coolant in the radiator
Answer #1Greg's Orange Auto (15171 Answers) , Orange, CA - (714) 361-9386globalhelper January 18, 2012, 08:44Master
you possibly have a plugged heater core. when the car is all warm turn your heater on and then feel both heater hoses at the firewall going to heater core if they should both be hot.if one is cold and one is hot you may have a plugged heater core. does the heater work ok?
Replyjkhehr, January 18, 2012, 08:45Rookie
It blows out warm air only when I have it on Max. How would I unplug the heater core if it is plugged.
Replyglobalhelper, January 18, 2012, 10:26Master
you can back flush it thru the heater core after you remove the hoses.