: Bleeding Radiator

09-10-10, 01:49 PM
What is the procedure to bleed the radiator? I recently had to replace the radiator, but for the first time this morning I decided to try the heat as it was a bit chilly......The flow is good but it is not effective.

09-10-10, 05:00 PM
With the car at operating temperature, and the heat on high, feel the heater hoses going to the heater core to see if there warm/hot. If not, and the coolant is at the right level, you're heater control valve is not working properly. Did the heater work before you changed the radiator?

09-10-10, 05:06 PM
There is no heater control valve in the later LT1 cars. It is very common for the heater core to be restricted, though, from the Dex Cool sludge. You can pull the hoses, and flush in both directions repeatedly to clear it out.

To bleed an LT1 car:
- park on a slope with the nose pointing up (or jack up the front of the car)
- start car, get up to operating temp
- place rags around base of thermostat
- carefully open bleeder screw fitting on top of thermostat housing
- release air, repeat until only a steady flow of coolant comes out with no air

09-10-10, 06:52 PM
OK thx