Date: Wed, 24 Mar 2004 14:17:51 -0800
Reply-To: vanagon <vanagon@ASTOUND.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: vanagon <vanagon@ASTOUND.NET>
Subject: Re: Sound Deadener Installation Concerns
Content-Type: text/plain; charset="iso-8859-1"
James,
I too have ran across this same area of working on vehicles. In the old
days we used undercoating and fiberglass matting and built it up on the
inside of the doors. It really makes the whole vehicle feel allot more
solid. I would hate to be the body guy now having to scrape that crud off
the inside of the quarter panels we did. I have used Dynamat a couple times
and I don't really like it much at all. For one, its super expensive for
what it is. It also is very heavy and more so than needs to be for what it
does. It also uses a glue that makes a complete mess if you try to remove
it, again overkill. In a vanagon you could easily add several hundred pounds
of that stuff and several hundred bucks doing what the rice boys do in their
cars with the stereo installs.
The stuff in the back of your vanagon over the engine deck, behind back seat
and up front in the footwells is definitely there for sound deadening and
heat insulation. It is put on very well to not allow water to easily get in
between the metal and the material. If you have ever removed any of it, you
will notice it is very well stuck on. In the front doors and the slider and
the large panel under on the drivers side VW put some smaller tar based
cardboard sound deadeners on the inside of the metal to stop the ringing tin
sound of a large sheet metal panel its not much material but it works
great. I have picked up a few of these in good shape at junkyards and used
them in interior body panels. you can use simple adhesive and if needed
remove them. They work great and are not overly heavy like Dynamat.
Most folks don't seem to car about weight much but also do not realize how
MUCH weight they add with each various project, second batteries, additional
relays, wiring, Dyna mat, bigger speakers, subs, bigger tires, wheels,
consoles, carpets, mats, stuff you always carry in the van, and, and, and ,
it all adds up. Before you know it your cool outfitted vanagon weighs in
allot more than a stocker and we wonder why are mileage and performance
hurt.
Anyway, if you want an alternative to Dynamat get some heavy construction
felt like #30 or #60 and cut it into the shape and use a MILD contact
adhesive that will keep it attached for then next 10 years or so like 3M #77
spray on adhesive, it is not that strong of a bond use it sparingly and you
will be able to remove the asphalt felt at a later time.
Lastly, the difference between no sound deadening and just a tiny bit in the
middle of a door will give you 95% of what you will get by coating the
entire inside skin of the door with 50lbs of Dynamat.
----- Original Message -----
From: "James V" <tornadored@EARTHLINK.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, March 24, 2004 1:13 PM
Subject: Sound Deadener Installation Concerns
> I've started installing some b-quiet Brown Bread sound deadener (dynamat)
> material to some of the panels in my 90 Carat. I have a few concerns...
>
> This stuff is REALLY sticky - pretty much permanent. I would think that
if
> I ever needed to get to the sheet metal below, it would be very
> difficult/messy. Has anyone had any problems as a result of this?
>
> Dent removal comes to mind (I've had paintless dent removal done on
another
> car w/ excellent results). I know the PDR guys work out dents from the
> inside, but I don't think it would be possible w/ the material there...?
>
> This wouldn't be an issue on panels that you don't see, such as under
seats
> and floor. But, as I'm also currently installing some audio components, I
> can foresee some problems in these areas if I were ever to modify or
expand
> the system or add additional accessories, requiring drilling into the
sheet
> metal.
>
> Last, certain panels look as if they already have damper material
installed
> from the factory. The engine deck, "firewall" under rear seat, and
drivers
> footwell all have a layer of similar material over them, painted over by
the
> factory. Is this, in fact, noise reduction material? Would I benefit
from
> adding an additional layer? Is there any place I definitely should NOT
> cover?
>
> Experience and thoughts appreciated.
>
> Thanks,
>
> James V
> 90 Carat
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