1963 coupe body mount cushions

[John F.]

Re: 1963 coupe body mount cushions

Frankie, did you video by chance?

[David L.]

Re: 1963 coupe body mount cushions

My 1963 Chevrolet Parts Catalog (Oct. 1962) does not list any body mount cushions for the 63 Corvette in Gr. 9.023.

My 1964 Chevrolet Parts Catalog (Oct. 1963) lists following for the 64 Corvette & 64 Corvette (Spt. Cpe.)
with the following description: CUSHION , No. 3, 4, No. 1 (1 5/8 O.D. x 1/2 thk.).........3842914 A.R.
and CUSHION ASSY., No. 3, 4, No. 1 (w/spacer)........................................... ..............3842913 A.R.
These same part numbers are listed in my 1967 Chevrolet Parts Catalog in Gr. 9.023 for 64-67 Corvettes.
Dave

[Alan D.]

Re: 1963 coupe body mount cushions

Here is what I used, thickness is 1/2" These are for a late model 64, not specifically for the seat belt area.
Had no problem installing, finished product was a little fatter than original

[Alan D.]

Re: 1963 coupe body mount cushions

See post #16 for tape comment.
My undersstanding is that all the rubber mounts with shim(s) got tapped before being installed
That has been confirmed by looking at my Mar64 car. Note, it's never had body removed and I've
owned since Aug67, know original owner also (NCRS member)

Tape in photo is on right side hanging down and top of cushion where you see the white.

[Frank D.]

Re: 1963 coupe body mount cushions

What does this mean? I have never done it or scene it before.

Original cushions, at least the inner 63 cushions, had a yellowish appearing (perhaps from age) tape around them going over the top and down the sides; I don't know if it wrapped completely around the cushion. It may have to hold the large flat washer to the bottom of the cushion during installation presumably.

My car did not have shims at either inner mount cushion location and I did not add any. This is the top of my original cushion with the tape remnants,

No I did not video the cushion installation, there was nothing really special about it except using a short crowbar between the rear of the frame mount and the metal bracket riveted to the body to get enough space to insert the cushion into the well-lubed factory cavity...

Then using a screwdriver to align the frame mounted captured nut, the large flat washer, and the cushion with the hole in the body for the bolt...then just insert and snug the bolt down..

[Michael M.]

Re: 1963 coupe body mount cushions

Frank, can you measure the diameter of your cushion? I want to know for reference on the cushions (GM #3842914) I have.

[Harry S.]

Re: 1963 coupe body mount cushions

Frank, can you measure the diameter of your cushion? I want to know for reference on the cushions (GM #3842914) I have.

I'm interested also, the 3842914 OD is about 1 5/8.

I'll take a guess and say it's about 2 1/2.

[Alan D.]

Re: 1963 coupe body mount cushions

Here is the one I removed, it's diameter is 2 1/6", remember it's been squeezed for over 50 years, so would assume the 2" is correct.
The cushion under discussion has been the 3832539 used in two spots in 63 - most of 64. When the new frame support was added (around April 1964) that area used the same 3832539. So the kit from LI has all 4 as the same, ie 2" X 1/2"
So why are we concerned with the 3842914??? PS it's 1 5/8" see photo
A few more pictures;

[Harry S.]

Re: 1963 coupe body mount cushions

Alan, just walked under the 63. My squashed one is 2.5, so 2.0 is good.

IMG_1488 (1).JPG

[Frank D.]

Re: 1963 coupe body mount cushions

Frank, can you measure the diameter of your cushion? I want to know for reference on the cushions (GM #3842914) I have.

Measured installed cushion with dividers then compared that to ruler and came up with 2-3/8"; now remember - that's distended due to being bolted down.

Original vs repro; now I have not cranked down on the repro via the bolt very hard, once it felt like the bolt was getting tight and the surfaces mated solidly I left things at that, there is also some "slop" in how you position the cushion as the bolt hole diameter in the rubber is larger than the bolt diameter by a good factor. I'm actually pretty satisfied with the look, fit and composition of the repro cushions from Corvette Central.

[John F.]

Re: 1963 coupe body mount cushions

Thank you everyone for the pictures and info. Blue painters tape will high light my nassau blue paint.

[Michael M.]

Re: 1963 coupe body mount cushions

John, I do not believe the factory used blue painters tape.

[Harry S.]

Re: 1963 coupe body mount cushions

John, I do not believe the factory used blue painters tape.

Richard Drew, a 3M scientist, invented masking tape in 1925. It was originally developed for use in two-toned painting on automobiles. The product now known as ScotchBlue™ Painter's Tape was invented by 3M in 1988. It was designed for professional painters to use in residential and commercial painting applications.

[Frank D.]

Re: 1963 coupe body mount cushions

I think it was thick clear tape and what we see today is discolored, aged remnants; I went through several videos of the St. Louis assembly plant build process and some John Hinckley presentations and couldn't find a good picture of the body mounts with tape on them, but they were clearly used..

[Harry S.]

Re: 1963 coupe body mount cushions

Oops.....

'63 092.jpg