1996 Camaro 3.8 Heater Problems - Team Camaro Tech
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post #1 of 14 (permalink) Old Feb 2nd, 07, 08:43 AM Thread Starter
Kent
 
Join Date: Feb 2007
Location: Mount Airy
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1996 Camaro 3.8 Heater Problems

Hello everyone and it is very nice to be here. Just wondered if anyone else has had this problem and what could be the cause. I have a 96 Camaro 3.8 engine automatic, the engine temperature stays about 160, I have installed a new radiator and 18 lb cap, heater core and 195 degree thermostat. The engine very seldom gets past 160 degrees operating temp and the heater always blows luke warm air, the electric fans are not running at all times and the heater control valve is operating normally. What could be the problem? Any help anyone can give me will be greatly appreciated. I live in North Carolina and some better heat would be nice. Thank-you,, Kent
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post #2 of 14 (permalink) Old Feb 2nd, 07, 11:48 AM
Senior Tech
 
Join Date: May 2001
Location: Ashby,MN, USA
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Re: 1996 Camaro 3.8 Heater Problems

did you check your new t-stat before putting it in?
sometimes they are bad right out of the box, and they can either stick open or stick closed.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #3 of 14 (permalink) Old Feb 3rd, 07, 08:26 AM
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mike
 
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Re: 1996 Camaro 3.8 Heater Problems

18 lb cap is too much imo for a plastic tank radiator...should be more like 13-15lb...did u get the tstat from napa???i`ve done 3 in my truck before i decided stant is the way to go...also make sure to use the proper coolant, as mixing dex-cool with conventional coolant is a nono..(that derrek is always right on point)
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post #4 of 14 (permalink) Old Feb 3rd, 07, 12:17 PM
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Re: 1996 Camaro 3.8 Heater Problems

i don't think a 16 pound cap is too much for the plastic expansion tank- the cap i got for my 94 Caprice was a 22lb cap.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #5 of 14 (permalink) Old Feb 3rd, 07, 01:28 PM
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mike
 
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Re: 1996 Camaro 3.8 Heater Problems

just my experience on the cap thing...i dont know about the cap on an expansion tank, but i know that if you overpressurize a plastic radiator, it leaks almost invariably at the seam between the tank and the cores...in addition, i`ve seen alot of dex-cooled vehicles with sludged up heater cores and you can usually backflush them to clean them up...that doesnt sound like your problem, but if the guage is not accurate, and you are at operating temp, maybe so...
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post #6 of 14 (permalink) Old Feb 3rd, 07, 03:23 PM Thread Starter
Kent
 
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Location: Mount Airy
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Re: 1996 Camaro 3.8 Heater Problems

Thanks for all the great suggestions, it has a stant t-stat, that I have taken out and checked in boiling water and it worked fine, it also has dex-cool in the radiator. I have an 18 lb cap,on now but tried a 16 lb a few weeks back it made no difference. Thanks again.
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post #7 of 14 (permalink) Old Feb 3rd, 07, 03:45 PM
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mike
 
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Re: 1996 Camaro 3.8 Heater Problems

the cap wont stop it from getting warm, but only allow the expanding coolant to go into the overfolw tank...with that said, the more pressure a system will hold, the hotter it can get without boiling...i dont know, man...i`d try another tstat...did you consider the diverter door in the air box???i`ve seen where a mouse built a nest in the air box, and it wouldnt close off to only pass hot air...
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post #8 of 14 (permalink) Old Feb 4th, 07, 10:13 AM
Nancy
 
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Re: 1996 Camaro 3.8 Heater Problems

Hello there,
I also have a 96, and I freeze all the way to work in the morning. I have checked everything, any help would be greatly appreciated.
thanks
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post #9 of 14 (permalink) Old Feb 4th, 07, 11:13 AM
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mike
 
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Re: 1996 Camaro 3.8 Heater Problems

well this thread covered just about all of it nancy...if you have something specific to ask, theres a lot of really knowledgable people on this site that will make an attempt to help you...
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post #10 of 14 (permalink) Old Feb 5th, 07, 01:41 PM
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erik
 
Join Date: Jun 2001
Location: back creek, nc, usa
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Re: 1996 Camaro 3.8 Heater Problems

Does it get hot while sitting still and then cool off while driving? Or does it not get to operating temperatures under any condition? Is there pressure on the upper hose or can you colapse it? If the system will not build pressure it can keep you from having heat and on some gm vehicles keep you from reaching operating temperatures!
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post #11 of 14 (permalink) Old Feb 7th, 07, 05:22 PM
Nancy
 
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Re: 1996 Camaro 3.8 Heater Problems

It does rise when I set at the stop signs and cools off as I drive. I put a new thermastat on. The coolant level is good. I am not sure what else to do. Thanks for all of your help
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post #12 of 14 (permalink) Old Feb 7th, 07, 05:43 PM
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mike
 
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Re: 1996 Camaro 3.8 Heater Problems

nancy, when the car`s at op temp, feel the hoses going in and out of the heater core with the blower fan on high...if theres a restriction in the heater core, the in hose will be hot, and the out hose will be cool, but if no restriction, they will be close to the same temp...i`ve noticed that dex-cooled cars seem to plug heater cores more often than the old green stuff...might just need to be backflushed...
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post #13 of 14 (permalink) Old Feb 8th, 07, 03:52 PM
Nancy
 
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Re: 1996 Camaro 3.8 Heater Problems

Thanks I will try that, I will let you know if it worked.
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post #14 of 14 (permalink) Old Feb 10th, 07, 03:07 PM
Nancy
 
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Re: 1996 Camaro 3.8 Heater Problems

I had everything flushed and new put in. It is still luke warm. He said my coolant wasnt very good. Now he is telling me that it could be a head gasket, but it isnt leaking anywhere. So who knows. Thanks for all of the help
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