142 guy
Member
- Joined
- May 31, 2014
- Location
- Saskatchewan, Canada
Thank you so much for all the advice. Definitely going to do:
-Scrapers on Windows
-Foam at shifter
-Butyl foil mat on hood, trunk (which has no foam currently), firewall, doors
Down the road I'll install the dampening under the carpets, but they're stock and in amazing condition, so I don't really want to go ripping anything up if I can avoid it.
Yes, adding scrapers would be a good thing.
Butyl mats are vibration dampers. They reduce the vibration of the panel which can amplify noise (think of a drumskin or oil barrel head); but, don't absorb or block noise. A square covering 20% of the surface area on large flat panels - inside of door skin, floor panels, roof panel (if you use the non butyl style which is more $) usually does the trick. Don't bother putting vibration dampers on highly curved surfaces because those panels are usually stiff enough that they don't resonate at frequencies that you will hear.
Mass loaded vinyl over a foam backing does the trick over floors, firewall and in the doors (a major hassle to attach it to the doors and can be a hassle to squeeze under the door card).
3M makes a sound absorber that looks just like the thinsulate insulation for jackets. The exact name escapes me; but, it has a quilted lining on both surfaces with one side being black. SDS used to sell this; but, no more and if you want to buy it from 3M you have to purchase a couple thousand square feet. But, if you are so inclined you could go out to a pick and pull and harvest some from wreckers (as long as it is dry). I know that behind the rear area interior panels on my 2003 Honda Pilot the cavities are stuffed with blankets of this stuff (you can see it when you pull the cover to access the jack). I expect that just about any vehicle that wasn't at the bottom of the price range has the 3M or equivalent stuff in it. You probably want to pick a larger vehicle so that you can harvest some reasonably sized pieces. Use this to line the back seat (to absorb road noise from the trunk) the back of the firewall (engine noise) between headliner and roof (two sided tape to hold it to the roof panel) and any other enclosed cavities. Do not put it into the door cavities because it will get wet which will be a very bad thing.