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#1
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93 overheating
My 93 over heats, but when I turn on the A/C it stays cool. Could it
be a relay or is my fan not working right? -- Posted using the http://www.autoforumz.com interface, at author's request Articles individually checked for conformance to usenet standards Topic URL: http://www.autoforumz.com/Corvette-9...ict100534.html Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.autoforumz.com/eform.php?p=463082 |
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#2
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when the A/C is on the 2 big fans run.. you may have a problem with the
little fan further towards the front of the car.. it is supposed to turn on around 230 degrees... troy "Randyb" > wrote in message ... > My 93 over heats, but when I turn on the A/C it stays cool. Could it > be a relay or is my fan not working right? > > -- > Posted using the http://www.autoforumz.com interface, at author's request > Articles individually checked for conformance to usenet standards > Topic URL: > http://www.autoforumz.com/Corvette-9...ict100534.html > Visit Topic URL to contact author (reg. req'd). Report abuse: > http://www.autoforumz.com/eform.php?p=463082 |
#3
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A/C turns on both fans. The most likely culprit is debris between the A/C
condenser and the radiator. I have no idea how the stuff gets into such a small space, but the radiator on my '91 was about 25% blinded with an assortment of what looked like straw, fur (?), and other material. I flushed the cooling system with a heavy duty cleanser, cleaned out the air passages in the condenser and radiator, and it cools fine now, even in 100 degree summer weather. -- Charlie Funk Just Cruisin' Plus 800 888-0922 615 833-0922 www.justcruisinplus.com We prefer the MasterCard card "Randyb" > wrote in message ... > My 93 over heats, but when I turn on the A/C it stays cool. Could it > be a relay or is my fan not working right? > > -- > Posted using the http://www.autoforumz.com interface, at author's request > Articles individually checked for conformance to usenet standards > Topic URL: http://www.autoforumz.com/Corvette-9...ict100534.html > Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.autoforumz.com/eform.php?p=463082 |
#4
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"TroY4" wrote:
> when the A/C is on the 2 big fans run.. you may have a problem > with the > little fan further towards the front of the car.. it is > supposed to turn on > around 230 degrees... > > troy > "Randyb" > wrote in message > ... > > My 93 over heats, but when I turn on the A/C it stays cool. > Could it > > be a relay or is my fan not working right? > > > > -- > > Posted using the http://www.autoforumz.com interface, at author's request > > Articles individually checked for conformance to usenet > standards > > Topic URL: > > http://www.autoforumz.com/Corvette-9...ict100534.html > > Visit Topic URL to contact author (reg. req'd). Report > abuse: > > http://www.autoforumz.com/eform.php?p=463082 Thanks, I will check it out this weekend. |
#5
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#6
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You have several problems. I have a 92 and had the same problem last
summer. First, the radiator is not up to the task of cooling the car. Go to MidAmerica.com and get an all aluminum radiator. Second, change all the clamps to worm type. Those clamp on that cam from the factory let air enter the system when the car sits. Changing the clamps is good for five degrees. Get an inspection mirror and look at the back of the waterpump and I can almost bet it is leaking if you have not replaced it recently. Change your radiator cap as it is long overdue and go with the highest pressure you can get from the dealer. Yes, go with a low temperature thermostat 180 degree. If you try the 160 route it will not work and the car will heat up. The water circulates too fast. Flush the catch tank and system. Do, not backflush the system unless you are in the mood to change the heater core. The heater core is really thin and any excessive pressure in the system will make it spring a leak. I know as I have replaced several heater cores due to people backflushing. Go with a 50/50 mix of water and demineralized water. Distilled or deionized are fine. Go with normal anti-freeze and not the five year stuff as it does not cool as well. Replace your fan relays and if your fan still does not come on get a power programmer for your car to turn the fans on sooner. A 93 has an embedded chip so you have to get the programmer as you cannot remove the EPROM. Randyb wrote: > My 93 over heats, but when I turn on the A/C it stays cool. Could it > be a relay or is my fan not working right? > > |
#7
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The AC running should keep the car at about 194 degrees or thereabouts.
With the AC off, watch the digital temperature rise to about 128-130 and the fans will start and bring the temperature down to about 205-210. I called Pat Goss from "Goss' Garage" on the motorweek show (he has owned over 40 Corvettes) and asked if it hurt the car to let it run up to 230 or would it be better to run the AC to keep the temp down. He said that the high temp was not a problem, they were designed to run that way. "TroY" > wrote in message ... > when the A/C is on the 2 big fans run.. you may have a problem with the > little fan further towards the front of the car.. it is supposed to turn > on around 230 degrees... > > troy > "Randyb" > wrote in message > ... >> My 93 over heats, but when I turn on the A/C it stays cool. Could it >> be a relay or is my fan not working right? >> >> -- >> Posted using the http://www.autoforumz.com interface, at author's request >> Articles individually checked for conformance to usenet standards >> Topic URL: >> http://www.autoforumz.com/Corvette-9...ict100534.html >> Visit Topic URL to contact author (reg. req'd). Report abuse: >> http://www.autoforumz.com/eform.php?p=463082 > > |
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