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Distributor weight sliding puck thing

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Old Sep 14, 2025 | 11:08 AM
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Default Distributor weight sliding puck thing

Good morning everyone,

As I was installing the vacuum advance limiter in my distributor I noticed that only the bottom half of this part was installed, I later found the top bigger half on the floor, broken.



It doesn’t seem to be making much of a difference in the timing or drivability of the car, but I would like to make it right.

What is the official name of these? Looking up “HEI mechanical advance weight sliding pucks” just gives me recurve kits.

I’d also prefer to buy a new one rather than a 40 year old cracking prone original one from a junkyard. Does anyone know where I can get just them?
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Old Sep 14, 2025 | 01:00 PM
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Originally Posted by Piersonpie
Good morning everyone,

As I was installing the vacuum advance limiter in my distributor I noticed that only the bottom half of this part was installed, I later found the top bigger half on the floor, broken.



It doesn’t seem to be making much of a difference in the timing or drivability of the car, but I would like to make it right.

What is the official name of these? Looking up “HEI mechanical advance weight sliding pucks” just gives me recurve kits.

I’d also prefer to buy a new one rather than a 40 year old cracking prone original one from a junkyard. Does anyone know where I can get just them?
Some years ago, I found some that were Not for a distributor but were right size and worked. There were at a Big Box Hardware (either Lowes or HD) and along that aisle where there are dozens of cabinets/trays of many various types of hardware. I just kept digging 'til I found what worked. SMP still supplies many Other individual service parts for Chevy Distributors but it seems SMP has discontinued several P/N's including those plastic bushings. Distributor work is a dying art; has been all-but dead for some time.
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Old Sep 14, 2025 | 01:19 PM
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Nylon wear pads ? you might have to buy a weight kit with those included. Dont know the size in this kit so might not be for a GM distributor.
https://www.msdignition.com/products...ers/parts/8628

Last edited by BKarol; Sep 14, 2025 at 01:29 PM.
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Old Sep 14, 2025 | 01:29 PM
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I assume you have the weights and springs. The attaching posts on the center shaft don't appear to have any area to attach the springs, maybe just the picture.

From the photo, the "pucks" don't appear to be all that bad.


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Old Sep 14, 2025 | 04:00 PM
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The picture in my first post isn’t mine, just wanted to show what I was talking about.

I used the link to the MSD website, and according to the instructions they’re just called “weight pads,” which makes sense. I also found a different forum here that has different manufacturers part numbers for the things.

This is probably what I’m looking for then. The price isn’t too bad, but the shipping is where they get you. For that much it might be worth justifying a trip to the junkyard after all. Thanks for the responses everyone!
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Old Sep 14, 2025 | 05:37 PM
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It reads for a MSD, like in my previous post , so you need to check on size before you order.. Good luck.

Last edited by BKarol; Sep 14, 2025 at 07:17 PM.
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Old Sep 20, 2025 | 04:59 PM
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were you able to find the plastic parts you were looking for, if not I can check Monday and see if i have any at my work for a GM HEI distributor Henry @ oles carb
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Old Sep 20, 2025 | 06:06 PM
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Thanks for the offer Henry! I was able to find a piece at a hardware store that fit like Rebelyell suggested. It fits in the hole and should work well enough before I go to the junkyard to get a real one.
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Old Sep 20, 2025 | 06:20 PM
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Originally Posted by olescarb
were you able to find the plastic parts you were looking for, if not I can check Monday and see if i have any at my work for a GM HEI distributor Henry @ oles carb
If yours have identifying package that names manufacturer and part number; please share that ?
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Old Sep 20, 2025 | 09:48 PM
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If you have the # off the distributor I can look at the GM 1.2 parts book to see if it lists the part # and description
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Old Sep 21, 2025 | 01:38 AM
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I’d have to open it to verify, but I believe it’s 1112979 since it came from the L82 I used to have. Not that it would make a difference for that part I would think.
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Old Sep 21, 2025 | 09:38 PM
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Originally Posted by Piersonpie
Thanks for the offer Henry! I was able to find a piece at a hardware store that fit like Rebelyell suggested. It fits in the hole and should work well enough before I go to the junkyard to get a real one.
Experiencing some recall: Perhaps the small plastic bits (pucks?) I found in hardware aisle bins were intended for use as "drawer glides" in cabinets-furniture; where bottom of drawers' sides rest on top of the "puck" as drawer slides in-out of opening. The puck would be pressed into a small vertical hole in the face of cheaper-grade cabinet-furniture; just inside opening-cutout for drawer's face. I'm certainly no cabinetmaker. Compared to electrics & mechanics, I'm acutely handicapped w/ woodwork.
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Old Sep 22, 2025 | 12:30 PM
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I no longer have the parts break down catalog for distributors so I can not provide a part # or description of the part. I do have a few of them that were given to me by a friend that was a GM field service engineer but many of the parts that were the package of parts he gave are no longer available and some of them were never sold to the public.
Henry @ oles carb
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Old Sep 22, 2025 | 02:08 PM
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Believe you'll find them identified as "distributor weight pads"
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