Engine bay insulation? (Page 1/2)
Castlerocco MAR 28, 08:50 AM
I need to remove all the insulation in the engine bay from the strut towers and wheel wells. It's all messed up and coming apart. Is there any reason I should replace it? Or should I just leave it off?

------------------
Rocco

darbysan MAR 28, 09:55 AM
Just leave it off. I did with no issues, as have many others.

------------------
'87 GT , '00 3800 Series II SC, 4t65e, Vue Power Steering. (SOLD)

Larryinkc MAR 28, 02:39 PM
I took all the engine bay insulation out when a 3800 SC swap was done. It cleaned up the engine bay but too much heat goes through the firewall, the AC can't keep up. It is a black car with the Pisa Euro dash that only used the two side vents for AC air flow. I used Mighty Matt insulation with foil on both sides, it worked great, the cabin stays comfortable now during the summer. I installed it with 2 sided carpet tape.

http://www.fiero.nl/forum/Forum2/HTML/141041.html

Ebay listing:

https://www.ebay.com/itm/CL...a:g:VQUAAOSwD0lUa5Rz

http://www.bgf.com/products...degrees/mighty-matt/
Castlerocco MAR 28, 02:48 PM
There was no insulation on the firewall when I got the car. It's just on the sides of the engine bay. I can see installing it on the firewall, but can't fathom why you would need it on the strut towers.
Patrick MAR 28, 03:58 PM

Not including the firewall (where it cuts down on heat transfer to the cabin), the main purpose of the insulation elsewhere in the engine bay is to cut down on noise... so it's definitely not critical to have it mounted on the strut towers.
Larryinkc MAR 28, 04:01 PM
My engine bay has no insulation anywhere, it is a much cleaner look. The Mighty Matt is on the cabin side of the firewall.

[This message has been edited by Larryinkc (edited 03-28-2020).]

Castlerocco MAR 28, 04:08 PM
That's what I like. Nice and clean looking. I'll put up with noise for it to look good.

------------------
Rocco:
My Project
86 Fiero SE, Stock 2.8L, 4 speed

theogre MAR 28, 04:28 PM
Insulation on towers was likely to kill some engine noise and maybe prevent engine heat getting at suspension parts.
Doesn't to much of either and gets a lot of crap.

Front Firewall needs some insulation as said above.
Engine and Exhaust heats Cabin and maybe ECM w/o that.

Also See my Cave, ECM Heat to remove some insulation over it.

Many people are missing Heat Shields and won't help many things.
Firewall and trunk wall and more has them w/ or w/o insulation.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

rogergarrison APR 09, 08:50 AM
I threw out all the nasty insulation in all my engine bays. I never had any passenger compartment heat issues in summer with a/c...froze you out. I dont think I ever ran a/c at max. One of my cars was turbocharged and one was 383 v8 so they were both heat producers.
2.5 APR 09, 09:41 AM
Another good thing about not having the insulation, the insulation isn't there to get wet and take a long time to dry, potentially causing rust issues.