Chipmunk damage to Chevy Truck
Here is a link to Pictures on Photobucket (hope it works) showing the damage that Chipmunks did to the Insulation Blanket on the outside of the Firewall of my 2500 HD Diesel Truck. They tore the plast...
Forum Discussion
If there is a foil backing, it reduces the heat from the engine entering the cab through the firewall. The weave or foam in the liners is for sound deadening. Some liners have the additional benefit of being a fire retardant or blanket.
