Cooling Problems...

CHEVROLET CAVALIER
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GUSTAFA
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Hello before I start with my problems. Okay here we go. I bought a 94 Cavalier/2.2 Liter/3 Spd Auto/180000 miles and I had no heat. So being the person that I am I changed out the thermostat. Now I have an overheat indication, but it does not look like it is overheating. There is no leaking or smell or anything indicating an overheat except for the indicator running all the way to 260 degrees. Does any one know what this might be?

Thanks,
Gus
Feb 16, 2007 at 8:59 PM
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CHEVY22
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hi,
are the fans coming on at all, and are you sure you dont have a coolant loss anywhere , i would also check the hoses to see if they are all getting hot heater hoses included but watch your hands on moving parts
lmk

jim
Feb 17, 2007 at 12:40 AM
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GUSTAFA
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Thanks for the quick response. It didn't even get to that point of where the fan comes on. There is no coolant loss. The weird thing was that if something is overheating you can turn on the heater and it will blow hot air, mine was blowing nothing but cold air. It was like it wasn't even hot yet.

Gus
Feb 17, 2007 at 7:00 AM
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GUSTAFA
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UPDATE: This morning when I woke up I went to the store and replaced the radiator cap and the coolant temperature sensor. The car indicator still goes up way high (260 degrees) but I was sitting in my driveway so I let it stay running. After about 5 minutes after running at 260 the radiator hoses were still able to be touched and the heater was still blowing cool air. I don't understand, the only thing that I changed initially was the thermostat, why would putting a new thermostat in cause all of these problems? Any suggestions or comments? Thanks.
Feb 17, 2007 at 9:24 AM
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CHEVY22
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COULD IT BE IN BACKWARDS , THE COOLART IS NOT MOVING , SO YEAH IF IT DID IT AFTER THE THERMOSTAT SEE WHY , MAYBE FAULTY PART

JIM
Feb 17, 2007 at 10:00 AM
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GUSTAFA
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i installed it like i took it out. so i don't know. the bottom hose exploded when I let it sit there and run. so i got to get that fixed. and go from there.
Feb 17, 2007 at 1:46 PM
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CHEVY22
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i would now also suspect the water pump , since the thermostat was replaced and you are still not moving coolant or a possible blcokage in the radiator, your doing good , starting with the thermostat was good , but if def souns like the coolant isnt moving

jim
Feb 17, 2007 at 2:42 PM
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YWOODY
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hoses sound like one of the hoses is collapsing and not allowing the water pump to pull water rom the radiator. a new bottom hose may fix your problem.
Mar 31, 2007 at 1:56 PM
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GUSTAFA
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Okay, so here we go...found out some other problems...warped head so I had a little maintenance ahead of me.
Removed and replaced the following:
Radiator (nasty, nasty rusted water probably corrosive)
Water Pump (no propellers to move water due to they were rusted off)
Replace all hoses
Had head decked and cleaned and pressure tested...good to go
Replaced fan and relay (relay didn't work but special ordered fan first)
After all that the car will heat up and won't overheat but it will go from around 200* straight down to 140* then back to 200* then to 140*, but it will stay in the warm range and I still have no heat :( .

Any suggestions?

Thanks ahead of time.
Apr 1, 2007 at 2:19 PM
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RICKS74
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Sounds like your heater core may be blocked. No hot water is circulating through it to provide the heat.
Apr 10, 2007 at 8:47 AM
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