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Chipmonk Cheeks [message #363147]

Tue, 30 March 2021 13:15

Tom Katzenberger

Messages: 399
Registered: June 2019
Location: Kingsville, MD

Karma: 4

Senior Member

Guys,

Did GMC make any corrections to mitigate "Chipmunk Cheeks" on the 1977 Birchavens or should I address this issue before it occurs and while I have the side panels off?

Thanks for any and all input,

Take care all,
Tom

Tom & Oki Katzenberger, Kingsville, Maryland, 1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition

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Re: Chipmonk Cheeks [message #363166 is a reply to message #363147]

Wed, 31 March 2021 20:02

Scott Nutter

Messages: 782
Registered: January 2015
Location: Houston/San Diego

Karma: 4

Senior Member

If it bothers you I would take care of it while you have the panels off. I have seen 77’s and 78’s with the chipmunk cheeks.

Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas

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[GMCnet] Re: Chipmonk Cheeks [message #363168 is a reply to message #363147]

Wed, 31 March 2021 21:00

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

Tom,

Now's the time to fix the chipmunk cheeks. Many years back, at one of our
Dixielanders rallies, one of our members, a professional Corvette
restoration expert, demonstrated his method for that project: He removed
the rubber from the beltline rub strip and concealed beneath it some
screws/bolts into the interior frame. That allowed him to pull the cheeks
back into alignment. Then, with the wheel well liners removed, he placed
fiberglass "angle irons" over the sidewall/floor junction, and "glued" them
in place with resin and cloth. That not only sealed the joint but
reinforced the screws holding everything in place. With the rubber back in
the rub strip, there was no outside sign of the repair and it appeared to
be a permanent fix.

I'd already done something similar, without the fiberglass, to my
X-Birchaven, so I've never tried that method, but it looked good to me. :-)

Ken H.

On Tue, Mar 30, 2021 at 2:17 PM wrote:

> Guys,
>
> Did GMC make any corrections to mitigate "Chipmunk Cheeks" on the 1977
> Birchavens or should I address this issue before it occurs and while I have
> the
> side panels off?
>
> Thanks for any and all input,
>
> Take care all,
> Tom
> --
> Tom & Oki Katzenberger,
> Kingsville, Maryland,
> 1977 23' Birchaven, 455 C.I.D.
> _______________________________________________
> GMCnet mailing list
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: Chipmonk Cheeks [message #363177 is a reply to message #363147]

Thu, 01 April 2021 11:24

Tom Katzenberger

Messages: 399
Registered: June 2019
Location: Kingsville, MD

Karma: 4

Senior Member

Thank you Ken and Scott,

I will start the preventative modifications per Kens instructions. I found some old photos of the repairs and Have the concept of the operation. Thanks Guys.

Take care and stay healthy,
Tom

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Re: Chipmonk Cheeks [message #363181 is a reply to message #363147]

Thu, 01 April 2021 12:10

Scott Nutter

Messages: 782
Registered: January 2015
Location: Houston/San Diego

Karma: 4

Senior Member

If you need more info on the repair, I believe Jim B has a video on it from the co-op.
Scott.

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