LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Car is overheating...

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Old 05-10-2007, 02:01 PM
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Car is overheating...

Well now that the weather is warmer, I noticed my car overheats if I leave it sit and running, especially with the AC on. It is, however, running at normal operating temps as long as you keep the car moving. I havent checked anything yet, just wanting to get an idea of what to be looking for. I am thinking about flushing the coolant tonight, but other than that what should I be looking for?
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Old 05-10-2007, 02:26 PM
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proper functioning radiator cap, proper coolant/water ratio, proper operating fans, radiator not clogged internally or externally...
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Old 05-10-2007, 02:47 PM
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usually if it is staying cool while driving, your fans arent working. i had the same problem in my 94. turned out it was a bad relay under the hood and i rigged up a toggle switch to turn the fans on manually.
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Old 05-10-2007, 03:00 PM
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Originally Posted by camaroB4Cinterceptor
usually if it is staying cool while driving, your fans arent working. i had the same problem in my 94. turned out it was a bad relay under the hood and i rigged up a toggle switch to turn the fans on manually.
Ha, something electrical. Thats good for this guy! I can do electronics, but I suck at mechanical stuff. When do the fans turn on, or are they always on?
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Old 05-10-2007, 03:32 PM
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Could also be that the Front Wind Dam is worn down.... In these cars that drives a lot of air into the radiator and if it's worn less air flow....

My car used to run hot in traffic, I had excellent luck with just a 160 deg Thermostat and that solved the issue.... Just really depends on how HOT and how often it gets HOT as to the best solution....
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Old 05-10-2007, 03:52 PM
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Originally Posted by 96 Z 28
Could also be that the Front Wind Dam is worn down.... In these cars that drives a lot of air into the radiator and if it's worn less air flow....

My car used to run hot in traffic, I had excellent luck with just a 160 deg Thermostat and that solved the issue.... Just really depends on how HOT and how often it gets HOT as to the best solution....
I thought that the wind dam was only effective while the vehicle was in motion? I don't think that would have any bearing on the car when it is stationary.
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Old 05-10-2007, 04:01 PM
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Originally Posted by Sholt_c33
I thought that the wind dam was only effective while the vehicle was in motion? I don't think that would have any bearing on the car when it is stationary.
TRUE Wasn't thinkin there
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Old 05-10-2007, 04:42 PM
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Definitly need to check to see if your fans are coming on. Check fuses etc..
The fans should turn on around 190 or so I belive. When sitting does it get near the red?
When the car is moving the air hits the radiatior so the fans are not needed, thats normal.
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Old 05-10-2007, 04:58 PM
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Yeah if I dont turn it off or get moving it will go past the red (found that out the hard way) Thankfully it didnt hurt anything. It probably just needs some coolant I would imagine.
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Old 05-10-2007, 08:20 PM
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Originally Posted by The Captain
Yeah if I dont turn it off or get moving it will go past the red (found that out the hard way) Thankfully it didnt hurt anything. It probably just needs some coolant I would imagine.
Have you checked you fuses, sounds like the fans are not coming on. If that the case adding some coolant will not fix that, your car will still overheat.
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