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post #1 of 4 (permalink) Old Dec 22nd, 00, 12:16 AM Thread Starter
Senior Tech
Join Date: Jan 2000
Location: PA
Posts: 918

ok, first i could tell you that the problem is with my 69 camaro, but that's hard to do when it's not running, so please forgive me, but this is for my 90rs, w/3.1L. the engine warms up( 180+),and the fluid circulates, but i have no hot air comming out my heater. the antifreeze is good, thermostat is new. could it be a radiator cap, heater control valve, what ?
any help please, it's getting colder ...
merry christmas,
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post #2 of 4 (permalink) Old Dec 22nd, 00, 12:33 AM
Senior Tech
Join Date: Jan 2000
Location: Utah, no I\'m not mormon U.S.A.
Posts: 260

My nephews girlfriends P.O.S mustang was doing that very same thing, and ended up being the head gaskets. We tried changing the thermostat, but would not to any good.

The engine would heat up, but blew cold air. There ended up being a recall on it for that prob. And they fixed it for nothing, works fine now even thought it a pile.
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post #3 of 4 (permalink) Old Dec 22nd, 00, 02:41 AM
Join Date: Oct 2000
Posts: 1,273

Check the return side of the heater core water and make sure you have circulation to the heater core. If you don't, it's probably a valve. If it's not the valve, it could be the head caskets. Has the motor ever got past the saftey zone on temperature? Head caskets will go from an over heated engine and so will the heads. They warp from excessive heat.
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post #4 of 4 (permalink) Old Dec 22nd, 00, 03:34 AM Thread Starter
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Join Date: Jan 2000
Location: PA
Posts: 918

the motor has never over-heated, i did check to make sure i had no water in the oil, just in case the head gasket had a leak. there's no sign's of a blow or leaking gasket. i did call a friend at the chevy dealer and he told me to check to heater control valve, to make sure that's circulating, and if that's ok, he told me to try and find someone who can backflush my system to see if there is some kind of obstruction.
so i'll check out everything and see what happens.
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