Question about the MKIII firewall

[sai_supra1jz]

So I took a trip to the beach yesterday to enjoy myself and spend time with the fambam. The reason why I didn't say it was a nice trip was because on the way there and back, I was literally burned to death from the heat coming through the firewall of my Supra. The whole 2 and 1/2 hour ride there and back was very uncomfortable and I sweat like crazy from all the heat coming through. After this, I don't feel like taking a trip in my car again. Does anybody have any suggestions on what I can do to keep the heat from coming through the firewall? I have had this issue with both of the Supras I've owned in my lifetime, and both are 1jz swaps. I have A/C on the car right now but it needs to be hooked up and recharged. Any ideas or suggestions would be awesome. Kudos!

 

[mkiiichip]

So you took a 2.5 hr drive in 90* heat, without AC, and you were hot? Get out... WTF could be causing this?

 

[sai_supra1jz]

It was not 90 degrees. It was quite cool actually, high 70s to low 80s. The weather was no issue. My main question is, how do I keep the heat from the engine from coming through the firewall.

 

[Dylan JZ]

high to low 80's? :squint:


anyhow, I deal with the same thing in mine.. it's usually only after I get on it for a bit though, and the fan is going full blast.

 

[whitemike]

Just my feet burn in mine. I suppose you could line the interior firewall with some sort of material. I'm positive they make something for this issue, google it.

 

[Dylan JZ]

gold heat reflective tape perhaps..

http://enjukuracing.com/gold-reflective-film-p-7502.html

 

[te72]

I have a similar problem but mine is more due to the fact that the heater valve is out of the system right now (the valve that lets coolant into the heater core, or bypasses it entirely, mine exploded), and there's always hot coolant running through my heater core, just kinda radiates out... I plan on fixing the valve problem this summer, but also have a bit of this stuff as well, I imagine it would work to help insulate things a bit more.

http://www.amazon.com/Stinger-RKX36...3?ie=UTF8&s=electronics&qid=1271661956&sr=8-3

Bit more info on the Stinger stuff can be found here:

http://www.stingerelectronics.com/default.aspx

I'm in the process of laying some down on all the parts of the interior that have a nasty 'ping' sound when flicked. It's good stuff, nice and thick, not *too* heavy, and we're thinking it would do well as a thermal insulation as well... Coat a few sheets on your firewall maybe?

 

[MarkIII4Me]

http://www.secondskinaudio.com/thermal-acoustic-insulation/firewall.php

 

[Heavy D]

yea i get this same problem, i made apost about it, most people said cause of the boot from the shifter or, dont put outside air coming into the car, the heater valve thing, doesnt mater if coolant is cycling through it, most cars dont have a valve that does that

 

[sai_supra1jz]

Great input guys. I'm gonna look under there to see if they are any holes and buy some sort of insulation to block it off.

 

[whitemike]

Good luck

 

[iwannadie]

I drove without a dashboard or any interior besides front seats for a year in the Arizona heat and I was never any more uncomfortable compared to driving in any other car without the AC.

 

[BigBad92Turbo]

Check and see if your heater valve that sends coolant to your heater exchange is not stick open or is actuating when it should not be.

 

[RazoE]

apparently you don't know what "literally" means..

a stuck heater valve would always blast heat, and the heater core is always circulating if the CC is set anything above 65...

 

[BigBad92Turbo]

apparently you don't know what "literally" means...

Nope.. just a dumbass who had crazy heat on my feet for a while because of a stuck valve... Sorry I offered some advice, I will try not do so in the future until I learn the meaning of the word literally...

 

[RazoE]

Nope.. just a dumbass who had crazy heat on my feet for a while because of a stuck valve... Sorry I offered some advice, I will try not do so in the future until I learn the meaning of the word literally...

apparently you feel everyone is speaking to you..

I was literally burned to death from the heat coming through the firewall of my Supra.

see..? I was talking to the OP, not you, that's why I didn't quote you...
don't get butt-hurt so easily...




seriously though, these cars are all loaded with heater/AC problems from bad previous owners...

 

[BigBad92Turbo]

Oh boy... I must retract my statement and now I feel like a dumbass...
And yeah, you are not kidding about the Heater and AC problems on these cars....
P.S. You're illustration are awesome...

Now back on topic...

My SP71GTQ turbo kit generated so much heat as it was not wrapped or anything, I use to have the entire tranny tunnel very warm, no actually hot... Sucked most in city driving.

I did notice that once I got my lower diffuser (the big ugly piece of plastic under the engine that always breaks...) back on it actually seemed to help reduce heat. I would guess that the diffuser helped to route the airflow though the entire engine bay and ensure more complete exchange of air reducing hot pockets perhaps.

Just a though.

 

[RazoE]

no problem dude, I re-read and I do sound like a dick, my apologies..

us 92'ers gotta stick together.

 

[sai_supra1jz]

Aww, a fight and make up. How cute! 92Turbo, please post more pictures of you badass Supra. I will allow you to hijack my thread.

 

[te72]

yea i get this same problem, i made apost about it, most people said cause of the boot from the shifter or, dont put outside air coming into the car, the heater valve thing, doesnt mater if coolant is cycling through it, most cars dont have a valve that does that

Most cars also let heat into the car unless you have the temp set to a lower setting... Chevies are notorious for that, I was rather pleased that I could drive my 88 without having any air coming through the hvac at all.

So, if I set the hvac controls to 65, and I *don't* have the valve on the firewall, is it gonna help alleviate the heat at all? I intend to replace that valve, but need to figure out all the parts I need first.