How Did You Insulate Your Cab And What Did You Use?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69sixpackbee · 09-11-2002, 05:39 PM

I am sick and tired of the radiated heat from my engine compartment playing tug-o-war with my A/C!
I need to insulate the firewall (outside), underdash and the floor pan. What did you use, how well does it work and haow was it applied???
Thanx!

Big69C20 Toy · 09-11-2002, 05:44 PM

i didnt insulate my cab from engine compartment but i did my floor from underneath. I used some aluminum/padded heat shielding facing down. My cab still gets warm but not nearly as bad and with the new ac system it's ok. I think any sort of good thermal shielding they sell should work pretty well. also having non UVa/UVb windows does help a lot at adding heat, umm you kinda tan thru your windows. Maybe think about replacing windows and/or tinting them.

69sixpackbee · 09-11-2002, 06:44 PM

...windows are tinted and the cab is in the shade most of the time (cabover camper). I put a digital thermometer on the firewall from inside and the temperature was 227 degrees!!
No wonder it never gets comfy in there!
The windows all have new channels and rubbers. Theh doors have new weatherstripping also and the cab is solid and tight!
I am just getting too much radiated heat from the engine compartment.

Low68 · 09-12-2002, 12:28 AM

Portable air conditioned garage

Sorry
I put some kind of insulation down that just gets glued on with spray adhesive. It seems to help a little. I haven't driven it since I put the new stuff on yet. I had to redo it cause I got a new cab. I have tinted windows also. Good luck
Low68

Lippyp · 09-12-2002, 03:56 AM

What about wrapping the exhaust manifolds/headers with one of the heat absorbent wraps. I have heard that it will dramatically reduce engine bay temps, as the bulk of the heat comes from your exhaust, you may also need extra underfloor insulation above the exhaust as the later sections must then get hotter. This stuff is used a lot on race cars. Jegs sell it http://www.jegs.com/cgi-bin/ncommerc...51&prmenbr=361 particularly effective on headers which run hotter than standard manifolds.

Also you can get reflective heat barrier material that you can glue onto your firewall http://www.jegs.com/cgi-bin/ncommerc...81&prmenbr=361 I have something similar wrapped around my starter motor to try and prolong it's life.

70 Jimmy · 09-12-2002, 04:33 AM

The big problem with the wraps is that the heat is replaced by rust.

Lippyp · 09-12-2002, 07:14 AM

Does it rust because the wrap holds water? If the man lives in a dry area is this likely to be a problem?

09-11-2002, 05:39 PM	#1
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	How Did You Insulate Your Cab And What Did You Use?? I am sick and tired of the radiated heat from my engine compartment playing tug-o-war with my A/C! I need to insulate the firewall (outside), underdash and the floor pan. What did you use, how well does it work and haow was it applied??? Thanx!

09-11-2002, 05:44 PM	#2
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	i didnt insulate my cab from engine compartment but i did my floor from underneath. I used some aluminum/padded heat shielding facing down. My cab still gets warm but not nearly as bad and with the new ac system it's ok. I think any sort of good thermal shielding they sell should work pretty well. also having non UVa/UVb windows does help a lot at adding heat, umm you kinda tan thru your windows. Maybe think about replacing windows and/or tinting them. __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

09-12-2002, 12:28 AM	#4
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Portable air conditioned garage Sorry I put some kind of insulation down that just gets glued on with spray adhesive. It seems to help a little. I haven't driven it since I put the new stuff on yet. I had to redo it cause I got a new cab. I have tinted windows also. Good luck Low68 __________________ Build Thread

09-12-2002, 03:56 AM	#5
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	What about wrapping the exhaust manifolds/headers with one of the heat absorbent wraps. I have heard that it will dramatically reduce engine bay temps, as the bulk of the heat comes from your exhaust, you may also need extra underfloor insulation above the exhaust as the later sections must then get hotter. This stuff is used a lot on race cars. Jegs sell it http://www.jegs.com/cgi-bin/ncommerc...51&prmenbr=361 particularly effective on headers which run hotter than standard manifolds. Also you can get reflective heat barrier material that you can glue onto your firewall http://www.jegs.com/cgi-bin/ncommerc...81&prmenbr=361 I have something similar wrapped around my starter motor to try and prolong it's life. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

09-12-2002, 04:33 AM	#6
70 Jimmy aka Crusher, Crushergmc Join Date: Mar 2000 Location: Oregon Posts: 1,834	The big problem with the wraps is that the heat is replaced by rust. __________________ "KEEP IT DOWN!" 70 Jimmy 454 2wd 56 GMC Big Window "It's funny till someone gets hurt, then it's freakin' hilarious"

09-11-2002, 06:44 PM	#3
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	...windows are tinted and the cab is in the shade most of the time (cabover camper). I put a digital thermometer on the firewall from inside and the temperature was 227 degrees!! No wonder it never gets comfy in there! The windows all have new channels and rubbers. Theh doors have new weatherstripping also and the cab is solid and tight! I am just getting too much radiated heat from the engine compartment.

09-12-2002, 07:14 AM	#7
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Does it rust because the wrap holds water? If the man lives in a dry area is this likely to be a problem? __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.