Barrie,
There are too many variables out there to come up with an answer to
that one. Having said that, I'd suggest that you investigate a
reflective surface on the engine-side of the dampening material, or a
combo of insulating matereal atop a deadening compound. Dynamat and
others do this. Let me throw out someunrelated numbers that will be of
absolutely no use to you: Engine exhaust manifolds can easily reach
~1200 Deg F, if they are uncoated or unwrapped. Resin-based Fiberglass
panels will soften at ~150 Deg F. Some OEM paints blister or discolour
on the hoods of really hot engines. Assume a heat gun can do the same
thing at ~600 Deg F. Also, if the car is painted a dark color (or
colour) like BRG or black, the sun, itself, can heat the material to
nearly boiling (or higher). For this reason, many fiberglass panel/body
folks recommend against painting their products black.
JJJ
Barrie Robinson wrote:
Can anyone tell me with authority, the maximum temperature reached
under the hood - at the hood? I need to know to check out what
adhesives will stick sound deadening stuff under the bonnet (hood)
Regards
Barrie Robinson
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