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During the restoration process I thought I was pretty detailed baging and marking all fasteners but I have these two washers and for the life of me I can't place them I did scourer the AM but here I am asking you to identify
the location. Please help if you know.
Thanks,
Peter
As you can see the first picture is before blasting but they are the same part.
Hi tp,
It appears the hole is a 'bevel' from each side…. is that so?
It appears that one side is flat and the other has a crown…. is that so?
By the way I'm clueless at the moment!
Regards,
Alan
I am not at the shop so I can measure one...but the only washer that I know that looks like that is the special tapered washers used when compressing and staking the factory style trailing arm bushings.
Hi tp,
It appears the hole is a 'bevel' from each side…. is that so?
It appears that one side is flat and the other has a crown…. is that so?
By the way I'm clueless at the moment!
Regards,
Alan
Alan there are 2 of them. They are beveled on one side. The other side is flat. The beveled side is flat and bevels, no crown, it's the picture that may make it appear that way.
I am not at the shop so I can measure one...but the only washer that I know that looks like that is the special tapered washers used when compressing and staking the factory style trailing arm bushings.
DUB
I do not think they are from the trailing arms due to I only took them off the frame but have not disassembled them yet. So the forward bushings are still in place. Any help is appreciated.
I can not think of another place on a C3 a pair of 5/8 bolts are used.
Those 2 bolts have a high torque value.
Just the place an engineer would spec a thick washer with a countersunk hole under the bolt head.
No reason for the countersink under the nuts.
The nuts are all metal locking no need for serrated.
Just my WAG at a plausible answer, not going to crawl on the cold ground to look.
Hi tp,
I believe the washer you posted is GM 382048. It is noted as having the bevel cut.
It's the washer that was used as DUB described.
Why you have 2 loose washers and where they came from I don't know.
I looked through my 71 AIM for that part number but don't see it called out as used anywhere else. It wouldn't be called out as part of the t-arm because that came to the line as an assembly and so has an assembly number, not a list of individual parts that make up the assembly.
The front lower a-arm rear mounting bolt typically uses a GM 3779096 washer under it's head and is a serrated washer and the hole isn't beveled.
It's shown in my photo.
Regards,
Alan
These are the washers I have. I think I was confusing the description by DUB and Alan as the trailing arm front mount cushion washer. I'm still a little confused because it appears that the bevel excepts the flair from the bolt sleave in that assembly. Do I have this correct? If so I am not sure where they came from due to the fact that my TA's are still intact. I have not taken them apart. Crazy but thank you once again for all the input.
Hi tp,
That's what I said in my post…. "since the bushings on your t-arms are still assembled where did these 2 'loose' washers come from?"
At one time someone must have have needed a couple of washers, had access to these, and used them for another purpose.
You were left with the mystery!
Regards,
Alan
Yesterday I spent more than an hour and a half looking for the special 'retainer'washer' that's used at the frame end of the z-bar under the nut. I felt it pop off and heard it hit what I thought was the floor.
Started looking…..it had disappeared….. looked everywhere… thought maybe it hadn't hit the floor and was laying on the top of the frame rail and slid down under the birdcage rocker….spent a lot of time there.
It was laying on one of the upper members of my Quick-Jack. I couldn't see it but could feel it with my fingers!
Over the last 25 years I'll bet I've spent 3 entire days searching for 'lost' parts.
Hi tp,
That's what I said in my post…. "since the bushings on your t-arms are still assembled where did these 2 'loose' washers come from?"
At one time someone must have have needed a couple of washers, had access to these, and used them for another purpose.
You were left with the mystery!
Regards,
Alan
Yesterday I spent more than an hour and a half looking for the special 'retainer'washer' that's used at the frame end of the z-bar under the nut. I felt it pop off and heard it hit what I thought was the floor.
Started looking…..it had disappeared….. looked everywhere… thought maybe it hadn't hit the floor and was laying on the top of the frame rail and slid down under the birdcage rocker….spent a lot of time there.
It was laying on one of the upper members of my Quick-Jack. I couldn't see it but could feel it with my fingers!
Over the last 25 years I'll bet I've spent 3 entire days searching for 'lost' parts.
Thank you for all your efforts Alan. I know what you mean, spending time looking for thinks. Just Friday I was changing a bit in my Dremel tool and dropped the bushing from inside the capture nut. It took me 45 minutes to find it a couple of feet away. It gets exciting at times.
Help Identifying a Washer
