TOO HOT...
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Pro
Joined: Apr 2000
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From: Greensburg Pa
TOO HOT...
I'm sure this topic has come up before. The inside of the car gets very warm when driving extended periods of time. :mad Even with the windows down and t-tops off.
Hot air blows out of the vends even though they appear to be shut off. The temp control is also turned all the way to the max cool position. There is new insulation under the carpet. If the hot air would stop coming from the vents, the temperature would probably be alright. Any ideas or suggestions...?
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[Modified by apple76, 9:18 PM 8/16/2001]
Hot air blows out of the vends even though they appear to be shut off. The temp control is also turned all the way to the max cool position. There is new insulation under the carpet. If the hot air would stop coming from the vents, the temperature would probably be alright. Any ideas or suggestions...?
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[Modified by apple76, 9:18 PM 8/16/2001]
Team Owner
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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
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St. Jude Donor '06-'10, '13
Re: TOO HOT... (apple76)
Do you have the weatherstip / seal at the back of the hood in place ?
It keeps hot engine heated air from going into the cowl area and then into the car.
First thought.
It keeps hot engine heated air from going into the cowl area and then into the car.
First thought.
Le Mans Master
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From: Semper ubi, sub ubi
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Re: TOO HOT... (apple76)
Yes, the weatherstripping is rubber. I wraps around the top of the hood and about 1/3 the way down both sides. It is supposed to keep hot air from under the hood from getting into the cowl ventilation.
Racer
Joined: Sep 1999
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From: Holliston MA
Re: TOO HOT... (apple76)
I got the hood weatherstrip with my kit and never installed it because I never got around to figuring out where exactly it goes. Where exactly does it go?
My '69 has exactly the same temperature problems mentioned above.
My '69 has exactly the same temperature problems mentioned above.
Burning Brakes
Joined: Aug 2001
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From: I can explain it to you, but I can't comprehend it for ya.
Re: TOO HOT... (apple76)
It appears that this is a common problem with our sharks. Last week, I installed the missing weatherstripping at the rear of the hood to try to stop some of the heat from rolling through the cockpit...The Good news is that this did seem to help a "little", It still gets very hot inside the car but it does take longer before it heats up. The bad news..the car temp guage now reads 210 when it always ran under 190 before. This may not be completely the fault of the weatherstripping however, because I replaced the temp. sending unit the same day as I added the hood weatherstripping so it may or may not be actually running at 210. Bottm line is..I'm going to install heater shutoff valve or bypass heater core as soon as i can figure out exactly which hose..has anyone done this recently and can offer suggestions??
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Team Owner
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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
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St. Jude Donor '06-'10, '13
Re: TOO HOT... (apple76)
You may have a couple of problems:
1. Do you have hot air coming from the vents all of the time?
2. Does it only happen when the car is moving?
If yes to 1, then you may have a air diverter / door in the ventalation system that is not closing all of the way. This would alow air that has passed over the heater core to enter the cabin. One way to stop this is to fix that problem. Another way is to put shut off valves into the heater hoses. This will stop the flow of hot coolant to the heater core. And, no this will not hurt your cooling.
If yes to #2, it still could be part of #1 to blame and also it could be the weatherstriping at the back of the hood. There is a piece of weatherstrip that runs along the underside of the hood, at the back of it, that seals the engine compartment from the cowl area. If this strip is not there, hot air from the engine compartment will be pushed in to the cowl area. The cowl area is where all of the air for the ventalation system comes from.
Hope that clears it up.
1. Do you have hot air coming from the vents all of the time?
2. Does it only happen when the car is moving?
If yes to 1, then you may have a air diverter / door in the ventalation system that is not closing all of the way. This would alow air that has passed over the heater core to enter the cabin. One way to stop this is to fix that problem. Another way is to put shut off valves into the heater hoses. This will stop the flow of hot coolant to the heater core. And, no this will not hurt your cooling.
If yes to #2, it still could be part of #1 to blame and also it could be the weatherstriping at the back of the hood. There is a piece of weatherstrip that runs along the underside of the hood, at the back of it, that seals the engine compartment from the cowl area. If this strip is not there, hot air from the engine compartment will be pushed in to the cowl area. The cowl area is where all of the air for the ventalation system comes from.
Hope that clears it up.
Safety Car
Joined: Jun 2001
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From: Severna Park Md
Re: TOO HOT... (apple76)
So what you guys are saying is, there is no factory installed heater controll valve, and that hot water is always circulating thru the core. If this is the case, I believe installing a shut off valve should help cool it down some. Also need to make sure that, even though you have the blower turned off, driving at speed, high pressure air from the cowl is being pushed into the vents. if that can be blocked as well it should also help cool things down a bit.
Le Mans Master
Joined: Jul 2001
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From: absecon nj
Re: TOO HOT... (Jvette73)
even with the fan off its still on low speed pop your hood up and look down the cowl while its running and youll see that the fan is also on ....thats why that seal is very important around the hood it would pull hot air right in from under the hood and into the cabin...i have the same problem ..
Guest
Posts: n/a
Re: TOO HOT... (pats406nitrovette)
You can stop that low speed on the fan.On the top of the heater box just in front of the cowl is a electrical connection with four wires in it. Use a small screw driver to remove the brown wire. That will shut off the low speed of the fan.The other speeds will still work.Install a shut off valve in each heater hose and install the weatherstrip.That should help,but you can't keep all that heat out.Its just the nature of the beast. Chuck
Le Mans Master
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From: absecon nj
Re: TOO HOT... (chucks)
hey chuck thanks ill do it right now i hate having that fan on all the time i usually only use medium in the winter with the defrost anyway so low wont matter .....
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: TOO HOT... (apple76)
I've got the same symptoms. I lose 5 lb every time I go for a ride. :bs
I didn't know about the wesaher stripping. Here's a pic of Zwede's inside hood. It looks like he's got the rubber around the top edge of his L-88 hood.
I didn't know about the wesaher stripping. Here's a pic of Zwede's inside hood. It looks like he's got the rubber around the top edge of his L-88 hood.
Thread Starter
Pro
Joined: Apr 2000
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From: Greensburg Pa
Re: TOO HOT... (apple76)
Applied the weather strip ($7) 
to the hood this weekend. Also got a heater hose line valve which I haven't installed yet. It's vacuum operated
and I think its suppose to shut off the hot water circulating to the heater.
This valve is not an 'add on' but replacing an existing valve already attatched to the heater hose. I'll try to get some pix posted....
to the hood this weekend. Also got a heater hose line valve which I haven't installed yet. It's vacuum operatedand I think its suppose to shut off the hot water circulating to the heater.
This valve is not an 'add on' but replacing an existing valve already attatched to the heater hose. I'll try to get some pix posted....
Race Director
Joined: Aug 2000
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From: HONOLULU HAWAII
Re: TOO HOT... (apple76)
On the 7T9 Vette there are no heater and no heater hoses....we don't use heaters over here......So where is all the hot air cominig from?.....Should I pull the right kick panel and see if the door is closed?.....The heat seems to be coming in around both sides of the center console right at the gas pedal and foot area..... :confused:
Thread Starter
Pro
Joined: Apr 2000
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From: Greensburg Pa
Re: TOO HOT... (apple76)
After driving the vette to Carlisle yesterday, I can say the weather stripping helped somewhat. The Drive in the morning wasn't too bad but going home it got a bit warm . The A/C just didn't cut the heat that much. Much of the heat radiated up from the
floor boards and transmission hump. Yes, I have floor insulation under the new carpet.
It's just a hot cockpit... :( Today I plan on installing the heater hose valve...
. The A/C just didn't cut the heat that much. Much of the heat radiated up from thefloor boards and transmission hump. Yes, I have floor insulation under the new carpet.
It's just a hot cockpit... :( Today I plan on installing the heater hose valve...
Burning Brakes
Joined: Jul 1999
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From: Land O Lakes, Florida
Re: TOO HOT... (apple76)
Yea, that heater hose valve is the standard stock part. However, it does not work well and that is why, even after it is replaced, many of us install another valve down the line of that vacuum operated valve.
Many here have installed a ball or gate valve. That really stops the hot water flow.
:smash: :smash: :smash: :smash:
Many here have installed a ball or gate valve. That really stops the hot water flow.
:smash: :smash: :smash: :smash: