LT1 Motor - was overheating. Found temp sensor in head broken - replaced (GM part). Bled system upon refill of coolant on a hill (nose up) using the bleeder valves - felt confident. Started it up with heater on waited for thermostat to open to observe flow, lots of bubbling out of coolant and continued to use bleeders. Never saw flow (even from the little hose from the pump to the radiator neck)and no heat. Fans came on and dash guage indicated hot but not red zone. If reved a little, dash guage would fluctuate down quickly and then rise quickly. Placed the cap on and there was lots of bubbling in the overflow tank and the thermostat housing bleeder blew steam off like a tea kettle - shut it down. We have the long thermostat as required. I don't think it is the thermostat b/c we do not have heat and the little hose would still have flow. I think water pump. Anybody agree?
Thank you.
Stumped and frustrated.
Phil
Thank you.
Stumped and frustrated.
Phil
Aug 23, 2010 at 12:36 PM
