63 Spare tire lock pics

[Michael G.]

Re: 63 Spare tire lock pics

Its hard to tell if that 45 degree angle is a flat chamfer or more of a radiused scallop. Anybody know?

[Gary B.]

Re: 63 Spare tire lock pics

Its hard to tell if that 45 degree angle is a flat chamfer or more of a radiused scallop. Anybody know?

Mike,

Attached is a photo of another original pad. It looks like there is some left-right curvature to the cut on this one. This might be JD's lock. Unfortunately, I didn't adequately label the photo when I stored it on my computer, so I don't know for certain if it's his unless he recognizes it.

Gary

[Timothy B.]

Re: 63 Spare tire lock pics

John,

Do you recall how early the 63 is that you saw at the show, I am curious if the lock had the drain hole.

[Mike M.]

Re: 63 Spare tire lock pics

Its hard to tell if that 45 degree angle is a flat chamfer or more of a radiused scallop. Anybody know?

flat chamfer. mike

[Gary B.]

Re: 63 Spare tire lock pics

John,

Do you recall how early the 63 is that you saw at the show, I am curious if the lock had the drain hole.

Tim,

If you're asking me, not John, the lock at the show had the drain hole, but silly me, I didn't make a note of the VIN, so I can't estimate the build date.

Gary

[Michael G.]

Re: 63 Spare tire lock pics

OK here's the final trim job on the pad....what do you guys think?

Thanks

[Gary B.]

Re: 63 Spare tire lock pics

OK here's the final trim job on the pad....what do you guys think?

Thanks

Mike,

I think the central sloped part should cover only about 35% or 40% of that side, with a bigger percent than what you have to the left and the right not being part of the central slope. Look back at my posting on Oct 7 with the original and the LIC pads side by side. I think your central sloped part is a tad too wide left to right. I'll try and draw what I mean and post it later today or tomorrow.

Gary

[Gary B.]

Re: 63 Spare tire lock pics

OK here's the final trim job on the pad....what do you guys think?

Thanks

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

[Michael G.]

Re: 63 Spare tire lock pics

Thanks Gary, I figured I'd screw one or two up before we got it right, so its no big deal. I'll get a couple more pads and try again.

I've also learned that you should remove the adhesive patch in the area your removing, before you cut the foam.

I think Long Island follows these discussions sometimes, so maybe they'll correct the pads, once we figure out what it should look like...

[Gary B.]

'63 Spare Tire Lock Anti-Rattle Pad

I think Long Island follows these discussions sometimes, so maybe they'll correct the pads, once we figure out what it should look like...

Mike,

Yes, Kim Cohen has posted occasionally when it specifically relates to an LIC item. I'm wondering where LIC came up with the geometry of the LIC pad. Sometimes vendors pay for rights to the GM engineering drawing and attempt to duplicate the original GM design. If LIC did that, it begs the question are we trying to copy a geometry based on only having 48-year old worn rubber parts to examine?

Gary

[Michael G.]

Re: 63 Spare tire lock pics

I don't know Gary, its pretty hard to come up with a wear scenario that would turn the LI part into what we've been looking at from cars. Considering that the pad was shielded from direct debris and very seldom touched by customers, I don't know what would wear it. Maybe the foam corroded somehow.

[Gary B.]

Re: 63 Spare tire lock pics

I don't know Gary, its pretty hard to come up with a wear scenario that would turn the LI part into what we've been looking at from cars. Considering that the pad was shielded from direct debris and very seldom touched by customers, I don't know what would wear it. Maybe the foam corroded somehow.

Mike,

I mostly agree with you. I've never judged exterior on a '63, but if I were a judge and presented with the current unmodified LIC pad on a lock, I would say the geometry is not typical factory production based on the few original pads I've seen. I'm just surprised that the LIC pad has the shape it has. Why would someone come up with a shape that looks so obviously incorrect? Very odd.

In terms of being shielded from direct debris, I've seen a handful of spare tire locks that are extensively pitted, corroded and totally inoperable because of their exposure to the elements. I can see a rubber part like the anti-rattle pad losing material and sharp corners on the edges after 48 years of exposure to rain, salt, snow, rocks, and other road debris.

Gary

[Michael G.]

Re: 63 Spare tire lock pics

I really can't imagine a reason GM would have put the LI shape on the pad in the first place, it doesn't remotely fit the lock surface, nor does it have any chamfer.

Since the few original pads that we've seen are almost identical to each other in contour and chamfer, even after after 48 years of wear, I'm leaning toward the original pads still maintaining a fairly close approximation of their original shape. If someone produces a 38 mile car with the pad in the LI shape, maybe I'll believe....

[Kim C.]

Re: 63 Spare tire lock pics

LIC part is made from the Blueprint and original samples.

The width, corner cuts etc are exact to the blueprint.

The only difference from the blueprint is the slant.

see diagram with measurements attached.

link to part #11-17

[Michael G.]

Re: 63 Spare tire lock pics

Thanks for your input, Kim. I'd very much like to see the GM drawing and any pics of originals you might have, so we can bring this discussion to and end.

Thanks,