Insulation around engine bay...? (Page 4/5)
PhatMax MAR 03, 02:59 PM
The thermo tec stuff is nice. It’s tough to cut…..I couldn’t burn it with just a lighter. They also sell the spray adhesive that is high temp. I only used it in spots that had a tight bend….but if you cut the brackets right it won’t fall off. At the moment I have not started the car after rebuild so I have no comment on heat and sound..
Spadesluck MAR 03, 03:19 PM
Anything that has a "tar" based backing I would not put in an engine bay; it will just melt and make a big mess.

PhatMax and Joe, thanks for the advice as I had forgotten about ThermoTec.

[This message has been edited by Spadesluck (edited 03-03-2023).]

Cajun MAR 09, 08:20 AM
I have a template for the back firewall for cutting out insulation. If anyone wants to borrow I would be more that happy to send to you if you are willing to return if completed your project. I have loaned the template to several members in the past. I fact, I believe the template made it's round in Canada a few years back.


Cajun.
theogre MAR 09, 01:25 PM
Beside many things you could replace OE insulation will easily burn in the engine bay...
A lot of stuff will hold water, oil, etc or dissolve expose to any chemicals. Often then falls off in pieces on the Cat etc that can burn even flame safe insulation. Like fall on Exhaust pipes and Cat that runs > 600°F normally. If Burning oil, running too lean or rich, or other problems w/ a Cat can see Exhaust Temps > 1000°F.

Quick Example: Spray Rubber Undercoating/anti-noise products, Pro or DIY installed, can dissolve getting hit by leaking/spilled gas, oil, and other solvents. May not come off right away but gets weak and fails often at worse time.

"Fire Proof" stuff often have limits and will burn if sees exhaust hitting from a leak or fall on pipes.
Like "Fire Proof/Safe" stuff often will burn but self extinguish when another heat source is removed. Most kid cloths, "Plenum Rated" wiring, FR4 etc circuit boards and way more do this. Even DuPont Teflon, Nomex and Kevlar will burn but needs a lot of heat to start. (Or High O2 levels...)

Yes, OE stuff is a pain after 20-30+ years... but does things many other materials fails...
Like Most times OE Side "Insulation" holds dirt and looks bad now but not polluted water to rust the strut towers. If it does is because Way dirty and that dirt hold the water. Doesn't hold a lot of oil either unless oil leaking on it for months to years allowing oil and dirt to buildup.
zkhennings MAR 09, 02:17 PM
I have used the thermotec material myself, it is good up to 2000*F, and does a great job with heat. I have no carpet or trim in my interior asides from the center console stuff, dash, and door panels, and the firewall would get HOT after pulling the nasty stock insulation out. I have no AC so this was an extra big problem. The Thermotec worked great.



Only recommendation I have is to find a good way to retain it at the top, even aluminum tape would work fine.
PhatMax MAR 09, 04:06 PM
If you’re talking about the top where it folds underneath….mine had those big head plastic rivets across there. Same ones that hold the trunk carpet in place. I believe there were 3.. Thermotec has the high temp spray glue….seems to hold pretty well.
ArthurPeale MAR 09, 05:05 PM

quote
Originally posted by Cajun:

I have a template for the back firewall for cutting out insulation. If anyone wants to borrow I would be more that happy to send to you if you are willing to return if completed your project. I have loaned the template to several members in the past. I fact, I believe the template made it's round in Canada a few years back.


Cajun.



I'd love to see this as a printable.
olejoedad MAR 10, 07:14 AM

quote
Originally posted by PhatMax:

If you’re talking about the top where it folds underneath….mine had those big head plastic rivets across there. Same ones that hold the trunk carpet in place. I believe there were 3.. Thermotec has the high temp spray glue….seems to hold pretty well.



I use the three big push plugs as well as aluminum foil tape to retain the top folded edge, and also the bottom.
No glue, the stock attachment standoffs retain then insulation well if the insulation is "tabbed" to fit under them.
zkhennings MAR 10, 05:24 PM
It's really not bad making a template with some thin cardboard, that is what I did. I used the dirty thumb trick where you put your cardboard over the feature or edge you need to cut around, and rub your dirty thumb over it and the outline will show up in grease. Doesn't need to be perfect, you can add masking tape or duct tape etc to fix any mistakes or make any holes that are too large or offset to line up properly.

I think I used cereal boxes and made the template in pieces that I taped together at the end once they all fit.
82-T/A [At Work] MAR 10, 07:53 PM

quote
Originally posted by zkhennings:

I have used the thermotec material myself, it is good up to 2000*F, and does a great job with heat. I have no carpet or trim in my interior asides from the center console stuff, dash, and door panels, and the firewall would get HOT after pulling the nasty stock insulation out. I have no AC so this was an extra big problem. The Thermotec worked great.



Only recommendation I have is to find a good way to retain it at the top, even aluminum tape would work fine.




LOL! I'm going to be in MA next week... going to be driving through "Woosta" MA as I visit my old prep middle school in Deerfield, MA.

Gonna hit all the typical spots... night on the town in Greenfield, the Yankee Candle Company... Salem, Plymouth Rock, Chappaquiddick... where I'll tell my daughter about this guy named Ted Kennedy, and then after a quick jaunt to Acadia National Park in Maine, I'll head back for some sausage at Faniel Hall!