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I have a 68 vette and I just painted the engine bay. I was wondering if the trans tunnel and lower fire wall insulation are necessary. I don't care at all about how hot the cabin is i just don't want my floors to melt. id rather not have the insulation. Does anybody know that if I don't use it it will melt the fiberglass?
Hi Yvh,
It might be a good idea and something you'll be glad you did.
Interior heat problems are real.
The foam transmission collar (just set in place as the body comes down) and the foil transmission tunnel shield (4 clips) take less than 5 minutes to install and will help keep the interior from getting so hot.
You'd be foolish to not install them.
Regards,
Alan
I covered my 69 interior with DynaMat Xtreme when I did the interior, stereo, carpet and backing a few years ago. That made it very comfortable and quite inside. I just finished the engine/trans rebuild, and installed all the underside insulation/shields. It's like a new luxury car inside now. No heat from the floor, a lot less road noise, and just a plain overall comfortable feeling. And I know some of it is just in my head, you know, wash your car, it's faster kinda thing.
I'll put it this way, if I had to do it all over again, I'd spend every penny on what I did to do it again. It's well worth it to me.
Hi Yvh,
It might be a good idea and something you'll be glad you did.
Interior heat problems are real.
The foam transmission collar (just set in place as the body comes down) and the foil transmission tunnel shield (4 clips) take less than 5 minutes to install and will help keep the interior from getting so hot.
You'd be foolish to not install them.
Regards,
Alan
Well I am not sure if it was a big ticket item for the OEM insulation but it will make it a little more comfortable so they say. 1969/69 technology was I guess not as good as what is out on the market but still it is something. Just saying!
RVZIO
I would put in the transmission tunnel insulation, but unless your going for the factory look or NCRS judging points I don't think I'd waste my money on the GM issued firewall/floor insulation. They added it mid year in 68 in response to cabin heat issues and dropped it before the end of the 69 model year. Never to be seen again. Not a sign it was a success.
I would not leave the insulation away! I have all of the factory insulation underneath and even with that the trans tunnel and floorboards get quiet toasty... I even bypassed my heater core, because with the trans tunnel getting toasty I dont Need it... But I am talking late Fall not wintertime...
Suit yourself. You also have a post wanting to buy aftermarket wheels for your car. Why not pass on the wheels and purchase the insulation?
I don't have any wheels right now an I'm not gonna buy cheap wheels and then buy nice ones later... I'm 16 years old so to get this car driving I have to cut corners where it doesn't matter (and or doesn't matter to me) to save money or the car wouldn't get done.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
If you dont use the insulation, still use the metal shields and not the plastic ones. I still am trying to get those, as I keep forgetting when I place orders. 68's have fiberglass floors and any debris from the road can come up through it, I have a nice crack to prove it.
And I have a little self adhesive insulation the PO put on poorly in the tunnel that seems to keep the heat down. Depending on where you live the heat can be unbearable. When I pull the motor I will be doing a better job
Do I need under body insulation?
