63 Spare tire lock pics

[Gary B.]

63 anti-rattle pad; LIC repro

LIC part is made from the Blueprint and original samples.

...

The only difference from the blueprint is the slant.

Kim,

I'm curious was the slant from teh GM drawings not incorporated on the LIC part because it wasn't possible to create with a simple die cut operation?

Thanks,

Gary

[Kim C.]

Re: 63 anti-rattle pad; LIC repro

Kim,

I'm curious was the slant from teh GM drawings not incorporated on the LIC part because it wasn't possible to create with a simple die cut operation?

Thanks,

Gary

yes Gary, - I provided the dimensions in previous post if you are interested in the slant dimensions.

[Gary B.]

63 anti-rattle pad; LIC repro

yes Gary, - I provided the dimensions in previous post if you are interested in the slant dimensions.

Kim,

Thanks for providing the reasoning for the slant missing from the LIC pad. That information is helpful for those of us who will buy the pad to understand why it is the way it is and how to make it correct by adding the slant along the one edge.

Last night I was shown a photo of an original '63 pad that retained more of its original width, and that pad is noticeably wider than the width of the lock. From this I've concluded that many original pads were wider when they were new, then they are now.

Speaking for myself, I'm now reasonably convinced that many of the original pads we see in photos have lost material, and also lost a number of the original features (true width, sharp edges, angled corners) as a result of 48+ years of deterioration in a relatively harsh environment for foam rubber, namely under the back of the car exposed to exhaust gases, rain, snow, debris, salt, etc.

I know that the original '63 lock with pad that I own loses rubber material every time I pick it up to examine or measure it. I assume all original '63 anti-rattle pads are similarly fragile.

I'm very appreciative of your willingness to contribute to the NCRS DB discussion.

Gary

[Gary B.]

Re: 63 Spare tire lock pics

Mike,

I think we may have given you a bum estimate of the angle of the sloped section. I think the angle will have to be steeper than 45 degrees in order for the left-right extent of the central sloped section not to be too wide. Attached is not-to-scale sketch of what I envision, with the original LIC shape shown by the dashed line. In my sketch, the top of the slope extends for a little under 60% of the width of the trimmed pad. Without a correctly scaled 3D drawing, I don't know what would look best. The next time I place an order with LIC, I'll buy some pads to try out.

Gary

Note that the sketch I attached to my Oct 10 posting I no longer consider accurate. Please read all of the threads in this discussion before making any conclusions about the pad geometry.

Gary

[Michael G.]

Re: 63 Spare tire lock pics

OK, here is the latest attempt to alter a LI pad to make the chamfer match...

Whaddaya think?

The LI glue for attaching the pad was on the whole mating side of the pad. Since part of that surface does not adhere to the lock, I had to remove all the glue and start over, (so it wasn't a dirt magnet). After I removed all the glue with Goo Gone, I had to contend with a clear plastic substrate that held the glue. That was not easy to get off the pad without ripping pieces of the pad off...

[Gary B.]

Re: 63 Spare tire lock pics

OK, here is the latest attempt to alter a LI pad to make the chamfer match...

Whaddaya think?

Mike,

Based on what I know at this time, I think you've done a good job. Did you wind up rounding the angle cut corners at bit? They don't look quite as sharp as the corners on the sample LIC pad that I have.

Gary

[Michael G.]

Re: 63 Spare tire lock pics

Yeah, I rounded them a bit, I might do a little more to make them closer to radius..

[Gary B.]

Re: 63 Spare tire lock pics

Yeah, I rounded them a bit, I might do a little more to make them closer to radius..

Mike,

If one truly believes that the LIC part is an accurate representation of the geometry (apart from the slanted edge) as defined in the GM engineering drawing then I think the rounding of the corners might be viewed as an attempt to mimic a slightly worn part rather than the original part. In turn, this makes me wonder how a judge is likely to assess your pad when (or if) the '63 TIM&JG ever has an updated description of pad shape. I suppose that rounded vs. angled corners might never be worth more than a fraction of a judging point, so it might be a moot issue.

Hopefully, this thread is near to some closure.

Gary

[Michael G.]

Re: 63 Spare tire lock pics

Well, I only lost a point for the wrong lock, with NO pad, so I can' see how the correct lock, restored, with a very close pad, would not get better than that...

Frankly, I wouldn't have gone to all this trouble for points, I'm just learning what I can about the cars.

[Gary B.]

Re: 63 Spare tire lock pics

Well, I only lost a point for the wrong lock, with NO pad, so I can' see how the correct lock, restored, with a very close pad, would not get better than that...

Frankly, I wouldn't have gone to all this trouble for points, I'm just learning what I can about the cars.

Mike,

I agree that I've learned a lot as well and I thank you for contributing significantly to the process. And I agree that you're unlikely to lose any points with the right lock and any reasonable looking pad.

Gary