Hi Listers,
Here's a few responses to the 'dum-dum' query (what to replace that patch of
sound absorbing hardened goop on TR timing chain covers?):
<< The last time I made a sound deadener I used an gray epoxy that took a
while to set
up (the high strength ones). I mixed up a bunch of the stuff and "slathered"
it on the front of the cover. Looked good and wasn't about to come off!
Cheers, Bruce >>
<< Brushed on asphalt undercoating. 'Spray on' will work but requires
several tack coats. Regards, Joe - FirstTR2 >>
<< I'd use something like Sikaflex (from Sika Corp), which sticks to metal
very well, and takes paint quite well. It's very flexible, so there wouldn't be
a problem with it de-bonding and falling out due to the combination of
high-frequency vibration and heat cycling. Cheers. Michael D. Porter >>
<< Sikadamp 630 (from Sika Corp) may help with what you need. Its outside
temperature is about what the high temp on the engine should be. The product
is a 3mm thick elastomeric sheet with a foil liner on the top. The elastomer
absorbs the sound and bounces it off the liner back into the elastomer where
more of the sound is absorbed. I can't say for sure if it will work for you.
But it's worth trying. You can purchase it from a company in Florida called
Novicon. 813-854-3235. Regards, Steve Padgett Sika Corp. >>
<< To replace the stuff on the Herald engine timing cover, I just cut a piece
of the "Dynamat" insulation and stuck it on! I figured it was noise
dampening, so what the heck. Works well, looks fine, takes paint (once you
peel off the clear plastic top coating.) Scott >>
Anyone know where I can find some damn dum dum? :-)
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