Heats up only when AC is on
04-14-2011, 11:48 AM
#1
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Car: 1991 Camaro RS 305
Engine: 305 5.0
Transmission: 700 R4
Heats up only when AC is on
Hi guys I recently bought a 91 Camaro Rs 305 TBI but have been having problems with the cooling system for some reason it heats up only when the ac is on. It takes a while to heat up but when I turn the AC off the temp gradually goes back to normal. Does anybody know how to fix this?
04-14-2011, 12:44 PM
#2
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Car: 87 Camaro
Engine: 305 LG4 (H)
Transmission: 700r4
Axle/Gears: 2.73
Re: Heats up only when AC is on
Are your electric fans coming on when the A/C is commanded on? A/C puts a drag on the engine if the fans don't come on that may be your issue.
04-14-2011, 02:28 PM
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Car: 1991 Camaro RS 305
Engine: 305 5.0
Transmission: 700 R4
Re: Heats up only when AC is on
Yea the Fans are working fine when I turn the A/C on and will check and clean the gap between tha radiator and a/c condenser thanks much!!
04-14-2011, 09:13 PM
#5
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Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Heats up only when AC is on
The fans should always be on when the a/c is on except at higher speeds. the stock fan really isnt a good setup...id suggest upgrading to a dual fan setup.
05-01-2011, 06:00 PM
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Car: 1989 Chevy Camaro RS
Engine: L30 TBI 5.0L Vortec
Transmission: 700R4
Axle/Gears: Stock
Re: Heats up only when AC is on
Or a single fan with a shroud. The main issue is the single fan setup does not bring the air through the radiator but pulls it from the sides.
05-01-2011, 09:08 PM
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Car: 1991 Firebird
Engine: 383 stroker
Transmission: T-56
Re: Heats up only when AC is on
How hot is hot? Too hot or do you just notice some increase? Some increase can be expected since the A/c condenser is on the high side, therefore gets hot, so then you're getting all that warm air from the condenser into the radiator.
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