Date:         Sun, 12 Jun 2016 22:16:32 -0700
Reply-To:     Don Hanson <dhanson928@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Don Hanson <dhanson928@GMAIL.COM>
Subject:      Re: Sound mitigation
Comments: To: Neil2 <vidublu@gmail.com>
In-Reply-To:  <CAHTkEu+e=3KtgYjz7+H-dhTCx5stKUSYjObRN1gpXjXmfix_HA@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Yep, the fellow who did the welding got the message but he didn't heed.
In my box of too good to toss, I found an exhaust hanger that has two large
pivot points in the strap....So I swapped the normal type for that, leaving
it in a "z" configuration....no tension no noise transfer, but if the stock
diesel exhaust brackets should fail it won't destroy the whole system, and
it won't bounce into a following windshield.  The fellow who bent and
fabbed my exhaust....He couldn't be talked out of welding a hanger (with a
rubber isolation block) into the original system....... I had a really
noisy van till I got that off....easier to not argue with an "expert" who'd
never worked a Vanagon, then cut it off when I got home, but that was a
LOUD drive from Bend

On Jun 12, 2016 8:42 PM, "Neil2" <vidublu@gmail.com> wrote:

Unfortunately, if you advised him of his error to help all those who follow
he'd not react favorably.

I never considerd mounts so appreciate your response!

On Sun, Jun 12, 2016 at 6:41 PM, Don Hanson <dhanson928@gmail.com> wrote:

> The volume inside a Vanagon can be helped by a very careful assessment of
> how the motor, transmission and exhaust are connecting with the chassis.
> It's not widely understood, even by exhaust pros, how a little it takes to
> get a lot of noise inside. It's similar to using something against the
> motor and against your ear to listen....
>
> I just replaced my muffler...same mounts but the guy who welded for me
> snugged up a "redundant safety-only" exhaust hanger...one that was
> purposely slack... rubber even....  the noise inside was bad.... I knew
> exactly what he did, and when I slacked-off on that....again quiet!
>
>   Motor mounts, transmission mounts and also the floor is a big source of
> noise....
>



--
Neil2
'82 Diesel Westfalia (Ducky)
'86 Vanagon (SaVannah)
'08 170" 2500 Mega Roof Sprinter (Moby)
'90 Westfalia Subagon
Fulltiming since August 2008
Nunquam Pendite Divendium