2005 Chevy Monte Carlo

VKMRAK

MEMBER
2005 CHEVROLET MONTE CARLO
6 CYL
FWD
AUTOMATIC
32,000 MILES

I have no heat on either the passanger or driver side.
I noticed that the coolant temp was remaining on the low side I suspected that the thermostat was stuck open I replaced this and am now back up to normal operating temps and can see the thermostat cycle but I still have no heat. Both hoses from the heater core are hot. It was recomended that I may have air trapped so I spent an hour trying to get the air out I started to get some heat now. I wonder if I may still have trapped air I am not sure how to reliably bleed out the air properly and when to use the bleed screw by the thermostat. I also verified that the blend doors function properly.

1 Reply

RENAUDTN

MECHANIC
636 POSTS

First make sure your coolant is at proper level in your radiator and in your overflow tank. This is done with the engine cold. Add some if necessary. Then put your car on ramps/jack stands. The purpose is to have the radiator neck as the highest point in your cooling system. This helps to get rid of the air.
Then take the radiator cap off, and open the bleed screws. Squeeze the upper radiator hose to get the air out of it. Turn your car on and let it warm up. When coolant starts pouring out of the radiator neck, put the cap back on; when coolant comes out of the bleed screws in a continuous stream, shut them (leave them open as long as it's only dripping). It can take several attempts before you get rid of all the air.