I don't know what the padding is that is used in the engine lids, but I
had an engine fire and it burned the plastic off the sound proofing but
the sound proofing did not scorch, ignite or flame.
I'd be way, way shy of putting anything flammable in there.
If you have doubts about what you're putting in there just test it and
see if it shrivels up, ignites or flashes.
If you want info on flame retardant procedures for standard fabrics etc.
search macrame on Google, we used boric acid??? something simple like
that on hanging baskets using sisal and choir ropes.

Stan Wilder

On Thu, 12 Jun 2003 23:46:28 -0400 "rmstewart@mac.com"
<rmstewart@MAC.COM> writes:
> > How hot does the metal cover above the engine get?
> >
> > Would it be possible to use an open or closed cell neoprene thick
> rubber pad
> > to deaden the sound?
> >
> > I use a 1 inch thick open cell neoprene (wet suit material) under
> my big
> > speakers at home and deadens the sound underneath so anyone under
> me would not
> > feel the thumping sound of the loud bass. Just a thought.
> >
> > robert
> > NYC
> >
> >
> >         Years ago, when my neighbor remodelled her house, I cut
> eight pieces
> > out of the carpet she was throwing away.  I used the carpet from
> the back of
> > my van for a pattern.  I keep these piled up on top of the engine
> cover and
> > they do a good job of keeping the sound down.  Also handy when you
> must crawl
> > under your van or when you want something comfortable to sit on.
> >
> > Joe/Albuquerque
> >
> > 82 Diesel
> > gettin close to 300k
> >
>
>

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