Wall Heat Pump
96 chev cavalier no heat , new head gasket, water pump and thermostat ? HELP!?
I have a 1996 Chevy Cavalier that is driving me up a wall. I had the head gasket replaced , new water pump, thermostat, complete system flush. Temp guage goes all the way to red and back to cold in a matter of seconds and NO heat in car? Whats the problem here?
I own a shop, and have seen this many times in my life. The problem is; your system is low on coolant, and still has air trapped in the system. The vehicle you have is famous for this problem. What we do is jack the front of the vehicle up until the radiator cap, or fill point is at the highest point. Run the engine until the thermostat has opened. You can tell this by the fact the top radiator hose will be hot to the touch. Do this with the fill cap loose, and it will push coolant out all over the place, and then the coolant level will go way down. We call this burping the system, or making it puke to remove the air. Add coolant until it is full again, and then replace the fill cap. Turn off the engine, and make sure you have enough coolant in the reservoir. Let the vehicle sit until it has completely got cold to the touch. Remove the fill cap slowly, and if it is down any, put more in it. This should resolve the problem. If not you may have a faulty fill cap that is not letting the system take in coolant as it is needed. It’s a good idea to just replace the cap if there is any doubt.
You aren’t getting any heat because there is no coolant going through the heater core, due to the fact it is too low. The temp gauge will go to hot, and when the thermostat opens it goes to cold. Look around the thermostat housing to see if it has a bleed valve, if so; crack it open to let the air out. I have had some I had to drill a 1/8 inch hole in the side of the thermostat flange to make a bypass, so it would purge the air on its own. I have had some vehicles that this was the only way I could get the air out.
Glad to help out, Good Luck!!!
The story of the young girl and the heat pump villians
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