| Re: [GMCnet] sealing chipmunk air leaks [message #321855] |
Wed, 09 August 2017 12:17  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Chipmunk cheeks are caused by the downward pressure from the top of the
coach, combined with the delamination of the beltline. It becomes most
evident when looking straight down the side of the coach from front to
rear. How do you fix it? Best way is to remove the beltline covering,
uncover the interior, remove the front seats and re-inforce the ribs behind
the beltline. Then place lateral pressure against the beltline from the
exterior of the coach until it flattens against the ribs, then use
adhesives and mechanical fasteners to the reinforcements. Allow sufficient
cure time for the adhesives, then remove the mechanical pressure against
the exterior of the coach.
Easy way? Fill the gaps with expanding foam, and don't worry about the
pooch in cheeks.
Jim Hupy
On Aug 9, 2017 9:55 AM, "Bill Shourt" wrote:
Getting ready to seal air leaks into front cabin above front wheels and
sides of firewall. I have some latex based insulating foam sealant that is
minimally expanding made by DAP. In reading some old posts some have used
expanding urethane foam insulation. What have others used and recommend.
I always thought that I would de-chipmunkize the sides first before
resealing but I think that was a pipe dream and now I just need to get er
done.
--
Bill and Michele Shourt
78 Kingsley, origional
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| Re: [GMCnet] sealing chipmunk air leaks [message #321860 is a reply to message #321855] |
Wed, 09 August 2017 14:58  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I have found that the foam ca break down after time, so we coat that with
some RTV to cut down on oxidation/ deterioration.
On Wed, Aug 9, 2017 at 10:17 AM, James Hupy wrote:
> Chipmunk cheeks are caused by the downward pressure from the top of the
> coach, combined with the delamination of the beltline. It becomes most
> evident when looking straight down the side of the coach from front to
> rear. How do you fix it? Best way is to remove the beltline covering,
> uncover the interior, remove the front seats and re-inforce the ribs behind
> the beltline. Then place lateral pressure against the beltline from the
> exterior of the coach until it flattens against the ribs, then use
> adhesives and mechanical fasteners to the reinforcements. Allow sufficient
> cure time for the adhesives, then remove the mechanical pressure against
> the exterior of the coach.
> Easy way? Fill the gaps with expanding foam, and don't worry about the
> pooch in cheeks.
> Jim Hupy
>
> On Aug 9, 2017 9:55 AM, "Bill Shourt" wrote:
>
> Getting ready to seal air leaks into front cabin above front wheels and
> sides of firewall. I have some latex based insulating foam sealant that is
> minimally expanding made by DAP. In reading some old posts some have used
> expanding urethane foam insulation. What have others used and recommend.
> I always thought that I would de-chipmunkize the sides first before
> resealing but I think that was a pipe dream and now I just need to get er
> done.
> --
> Bill and Michele Shourt
> 78 Kingsley, origional
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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> GMCnet mailing list
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] sealing chipmunk air leaks [message #321869 is a reply to message #321855] |
Wed, 09 August 2017 18:41 |
<rallymaster
Messages: 361
Registered: May 2014
Karma: 2
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Senior Member |
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We found we got really good results using free samples of a stretchy
plastic glove. Purchased ones will probably work, too, just a little more
expensive.
Dip one or two fingers in the can, and apply the through the roof to the
desired area. Expreriment with various configurations of the hand and
fingers to get the desired shape and thickness of coverage.
That was after we ran out of foam paint brushes. The fingers worked
better. Don't discard the glove until the job is finished, or it doesn't
work well anymore.
Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
On Wed, 09 Aug 2017 15:17:17 -0600 John R. Lebetski
writes:
> I used "Through the Roof" quart can of clear flashing sealant.
> Applied with 1" paint brush which I then discarded.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
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