Re: [Amc-list] Bedliner/foam in rails

["oldcars@xxxxxxxxx" <oldcars@xxxxxxxxx>]

I think that in the early 80's the factory started filling in the frame
rails with paraffin wax, to keep out moisture and dust, as a part of the
multi-step process for reducing rust. 

Perhaps this could be tried, if you could get a clean and perhaps treated
surface on the inside of the frame rails?

Original Message:
-----------------
From: Frank Swygert farna@xxxxxxx
Date: Wed, 19 Dec 2007 15:28:43 -0500
To: amc-list@xxxxxxxxxxxx
Subject: Re: [Amc-list] Bedliner/foam in rails


It's one of those "sounds good in theory, doesn't work in practice" things
Don. The problem is the foam isn't 100% moisture proof. So what little does
get in can't get out, and you end up with worse rust (in spots) than if the
area was left open with good drain and air holes. The best thing you can do
is enlarge the weep holes near the bottom of the rails (there should be
some from the factory, sometimes just small gaps in seams that are hard to
find) and make sure air can get in from the top. You can't keep 100%
moisture out, so the idea is to make sure it drains or drys out instead.
That doesn't hurt a painted surface, standing water does though! Most
chassis rails rust out due to fine dust that collects over the years
retaining moisture. If you could keep everything washed out it would be
better than foam! Coating the inside with something to protect the bare
metal/primer then having adequate drain/air holes is the key. 

----------------
Date: Tue, 18 Dec 2007 16:04:06 -0500
From: Don <don_nsx@xxxxxxxxxxxx>

Why not fill the channels and subframes with expandable foam like they use
to seal house foundations.
Its not the same as the stuff they're using in new cars but it would keep
the moisture out and that would slow the rusting process.
I guess it helps with sound deadening too.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)


_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://www.amc-list.com/mailman/listinfo/amc-list

--------------------------------------------------------------------
mail2web.com ? What can On Demand Business Solutions do for you?
http://link.mail2web.com/Business/SharePoint


_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://www.amc-list.com/mailman/listinfo/amc-list