A few months ago I lined my tunnel cover with that foam-in-a-spray-can
stuff you can get at hardware stores.
It turned out to be a lot of work, mostly because the stuff expanded
a lot more than I expected, and I had to carve away about 2/3 of
the foam that I applied. Also, it shrank a bit as it hardened,
and the tension tried to pull the sides of the cover towards each other,
cracking the front rim in a couple of places. (I reinforced it with
epoxy and fibreglass strips.)
The final result was excellent, though. The cover is a lot firmer and
better damped. And even after driving in city traffic in 85-degree weather,
the sides and top of the cover are barely warm (while the firewall is too
hot to touch!)
Some tips, if you decide to try it:
1: Use a minimal-expanding foam to avoid having to carve out too much
later. When you carve it, you lose the "skin" that gives extra
strength and protection.
2: Study where parts of the transmission get close to the
cover, where you will probably have to carve a little anyway.
Also note that to get the cover on and off, you have to keep
the foam quite thin along the very top (like 1/2" thick).
I have O/D, which meant a lot more carving towards the rear.
3: Attach a temporary brace (e.g. a piece of wood) between the front
bottom corners, to maintain the cover's shape.
Doug Braun
'72 Spit
At 02:16 PM 6/13/01 , mark holbrook wrote:
>Does anyone have a good idea for a material I can line
>my car/trans tunnel with to stop the heat coing in so
>much. It has to be able to get wet and not fall apart
>since it will be under the trans tunnel where the
>original insulation is. Any ideas?
>Mark
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