90's camaro overheating , need help please! - Team Camaro Tech
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post #1 of 5 (permalink) Old Jan 12th, 03, 07:06 AM Thread Starter
 
Join Date: Nov 2002
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A FRIEND OF MINE JUST GOT A 90'S CAMARO WITH A NEWLY REBUILT 305. IT WILL RUN UP TO 240 AND PLUS. HE AS PUT A NEW FAN RELAY SWITCH,SENDING UNIT, AND A NEW THERMOSTAT(195 DEG). IT STILL OVERHEATS AND THE FAN WILL NOT COME ON. HE AS HEARD THE FAN COME ON ONCE AT ABOUT 180 DEGS. IT AS NOT COME ON SENCE. HE HAS HAD THE FAN TESTED AND IT IS GOOD. THE ONLY WAY HE CAN GET THE FAN TO COME ON IS TO TURN ON THE AIR CONDITIONING. ONE MORE GUESTION, WHAT SHOULD A STOCK 305 RUN (TEMP). THANK YOU FOR THE HELP.
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post #2 of 5 (permalink) Old Jan 12th, 03, 02:08 PM
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Bill
 
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name ????
The GM fan switch does not turn the fan on until about 240 degrees. However, the car should not be running this hot. It could be a number of things...radiator, fan clutch etc etc. A lot of the newer cars will also run hot if the spoiler under the front is missing or broken.
Hope this helps,

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post #3 of 5 (permalink) Old Jan 13th, 03, 07:32 AM
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i think they come on at 220, but how does the rad look? it my need to be cleaned out. also how about his rad cap, does it still have the right pressure. and if your friend wants to he can hook his fans up on a switch. its not very hard.
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post #4 of 5 (permalink) Old Jan 13th, 03, 01:39 PM
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the first thing i would do is start the car and look under the car for coolant leaks. if there's a leak, then pressure is lost and water is staying in the block too long. the fan not coming on, that is a good fan since it was tested, would probably have something to do with the relay. mabye the coolant temp sensor is reading incorrectly and the temp is fine. mabye a bad gauge? check this stuff out and get back to us.
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post #5 of 5 (permalink) Old Jan 13th, 03, 02:53 PM
 
Join Date: Jan 2003
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Try checking the fan sending unit. If it comes on at 240 it is already too hot. The fan should also fit half in and out of fan shroud. Also sometimes if the timming is set to advanced it may run hot. check you hoses and see if one is colapsed.It should run a constant 220.

[This message has been edited by RichardE (edited 01-13-2003).]

[This message has been edited by RichardE (edited 01-13-2003).]
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