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amishman
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 Posted: Fri Jun 28, 2024 12:57 pm Post subject: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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One of the nuts that connects the rear backing plate to the RGB appears stripped.
I was torquing it (43 Foot Pounds... I hope I read it right on the charts and it was not me that screwed the pooch here and did it too tight) and it tightened fairly good but then kept spinning and not getting super tight or torquing to spec.
Upon removal of the nut the whole Stud-bolt that the nut screws onto came out.
I can screw it back in but can't torque to spec. Hand tight it seems the stud screws in well but once I get to torquing the nut, it never can lock in at 43 foot pounds.
Can this stud be replaced or locktite put on the stud to get it locked in there?
What can I do at this point.
1st time I have experienced something like this so newbie when it comes to studs that pull out.
Guessing I need to remove the backing plate again and re-tap that stud hole and insert a new stud but never done that before.
Since there does not appear to be any slop and it tightens decently, just not tight enough for me to torque it down, any loctite for instances like this?
Other repair ideas?
Thanks
TJ
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Eric&Barb
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| Posted: Fri Jun 28, 2024 2:47 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Time-Sert would be best/easiest, but expensive kit to get for a one off problem like that.
Heli-coil will work, probably best to Lock-Tite that so both the stud and Heli-Coil do not easily work out of there when you disassemble that next time, plus seal the threads up.
Could have the hole welded up, then drill/tap.
Of course the other way is to have a spare outer RGB half. Good to have a spare part like that on the shelf just in case.
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amishman
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| Posted: Fri Jun 28, 2024 2:59 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| Eric&Barb wrote: |
Time-Sert would be best/easiest, but expensive kit to get for a one off problem like that.
Heli-coil will work, probably best to Lock-Tite that so both the stud and Heli-Coil do not easily work out of there when you disassemble that next time, plus seal the threads up.
Could have the hole welded up, then drill/tap.
Of course the other way is to have a spare outer RGB half. Good to have a spare part like that on the shelf just in case. |
Ah, thank you.
I had not realized a spare outer RGB cover would be an option. Never explored how hard or each it would be to replace that. If easier than the whole fixing the old, maybe that could be a nice idea.
I will see if these are sold anyplace or if someone here has a spare, and go from there.
Funny how you try to get the ball rolling and get some work done and always something seems to happen to slow me down. haha. I am slow enough.
Thanks for all the tips.
TJ
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amishman
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Eric&Barb
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| Posted: Fri Jun 28, 2024 3:46 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| amishman wrote: |
Thanks for all the tips.
TJ |
No problem!! Been trying to sort out a fix for cargo door latch with the outer handle. Unless one finds an NOS one, all the used latches out there are limping on their way out. Have a box full of the used ones. Think now we have a fix, but need to do a couple up and test on our daily driven bus. Taken months to figure that out.
Thankfully the RGB outer half is super easy to get in good usable shape. Do inquire with the seller that both bores the bearings seat into are not worn badly due to a seized bearing. You will want to run a fine flat file over the sealing surface that the inner RGB half seats to. Just enough to knock off any high points so it seals better. Too many DPOs did not pull out a torque wrench and just went with just crank it down as hard as possible with normal socket wrench, which warps slightly the metal, so it leaks.
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Eric&Barb
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| Posted: Fri Jun 28, 2024 3:52 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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As long as that Heli-Coil size has the proper thread pitch also, then it will work.
Personally hate dislike Heli-Coils due to my time in the USAF, and having too many bolts and studs come out with the Heli-Coil with that part when disassembling a machine.
A solid insert that can be locked or pinned into place is a lot better.
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amishman
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| Posted: Fri Jun 28, 2024 4:35 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Guess I will need to take the stud and nut down to local hardware store to see if I can figure out what they are and what pitch, etc... Hopefully local ACE Hardware has something my nut can screw onto so I know. haha
Wolfsburg West sells the stud but do not state the specs of it.
TJ
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amishman
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| Posted: Fri Jun 28, 2024 5:43 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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The added delay now means I went ahead and ordered two new rear back plates as mine are nasty. Previous owner painted over some rust and they don't clean up too well so gonna get new.
Once I figure out the size of the stud and thread pitch, I think I will try the heil-coil route for now.
TJ
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BarryL 
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| Posted: Fri Jun 28, 2024 6:39 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Whatever you do realize that you can't go any deeper than original.
Plus the hole commutes with the gear oil directly so when finished it must be leakproof.
43 seems high but I don't know. I only hand feel tighten them on mine. |
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amishman
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| Posted: Fri Jun 28, 2024 6:51 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| BarryL wrote: |
Whatever you do realize that you can't go any deeper than original.
Plus the hole commutes with the gear oil directly so when finished it must be leakproof.
43 seems high but I don't know. I only hand feel tighten them on mine. |
Ugg, that may be why I screwed it up. My guide showed 40-43 and I have done that in the past.
This thread is saying no-no and it is less.
I best back off the one that did fine at 43 and stick to less now once I fix my one that has thread issues, although, it could very well hold at 1/2 the torque too. Maybe I will see.
I for sure remember I could tighten by hand and could not budge it more and it held so.
https://www.thesamba.com/vw/forum/viewtopic.php?t=423828&highlight=errata
TJ
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BarryL
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| Posted: Sat Jun 29, 2024 6:09 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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That bolt is the little one at the very bottom that hold the slave cylinder in place. |
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campingbox
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| Posted: Sun Jun 30, 2024 7:32 am Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| amishman wrote: |
Guess I will need to take the stud and nut down to local hardware store to see if I can figure out what they are and what pitch, etc... Hopefully local ACE Hardware has something my nut can screw onto so I know. haha
Wolfsburg West sells the stud but do not state the specs of it.
TJ |
10x1.5 |
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amishman
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| Posted: Mon Jul 01, 2024 4:28 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| campingbox wrote: |
| amishman wrote: |
Guess I will need to take the stud and nut down to local hardware store to see if I can figure out what they are and what pitch, etc... Hopefully local ACE Hardware has something my nut can screw onto so I know. haha
Wolfsburg West sells the stud but do not state the specs of it.
TJ |
10x1.5 |
So if I am reading things right, these 10mm should be able to handle the 40 - 43 foot pound torque then. Unless I read the various threads wrong.
Anyway, I have some new back plates heading to me now. Figured now is the time to get er done.
I may just use some loctite and screw in that studd as it takes plenty of behind hand tightening for sure and betting the loctite will add to that. May be best to not go through the heil-coil stuff unless things were loose, which they are not.
The only ad I see here for the RGB covers, may not even be the right one for my 67 but could guage from the looks, the 3 I saw all had one missing stud. Must be a more common issue with these?
Thanks for the info all.
TJ
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Eric&Barb
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| Posted: Mon Jul 01, 2024 4:54 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Rusted on nuts tend to unthread the stud out during disassembly.
This advert found thru search for "RGB" shows three of the 1964-67 one ton outer halves. The two missing a stud looks like good threads. Personally have never had that stud strip out.
https://www.thesamba.com/vw/classifieds/detail.php?id=2595236
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Eric&Barb
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| Posted: Mon Jul 01, 2024 4:57 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Just make sure the letter suffix is same as your outer half. That way you avoid buying a 1963 only part.
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amishman
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| Posted: Mon Jul 01, 2024 5:10 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| Eric&Barb wrote: |
| Just make sure the letter suffix is same as your outer half. That way you avoid buying a 1963 only part. |
Thanks... and now seeing those stud holes go all the way through, I will refrain from any loctite.
Will have to see what mine is once I remove that backing plate again.
TJ
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Eric&Barb
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| Posted: Mon Jul 01, 2024 5:32 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| amishman wrote: |
| Eric&Barb wrote: |
| Just make sure the letter suffix is same as your outer half. That way you avoid buying a 1963 only part. |
Thanks... and now seeing those stud holes go all the way through, I will refrain from any loctite.
Will have to see what mine is once I remove that backing plate again.
TJ |
Yes, all the way thru. Be super easy to take the RGB outer half to your local muffler repair shop and have them weld up that hole. Grind and file down the welded area flat. Then use the old backing plate with drill bit that just fits the backing plate hole tight. Only drill that way enough to put in a dimple. Then switch to proper tap size drill bit and drill all the rest of way thru. Tap in new thread and dull up any sharp edges.
Might need a Dremil to grind down the inner side of that weld. If the welder is good, probably not.
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BarryL
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| Posted: Mon Jul 01, 2024 6:06 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| Those 3 outers say Big-Littlenut '63 only if that matters. |
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BarryL
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| Posted: Mon Jul 01, 2024 6:18 pm Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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| amishman wrote: |
| Eric&Barb wrote: |
| Just make sure the letter suffix is same as your outer half. That way you avoid buying a 1963 only part. |
Thanks... and now seeing those stud holes go all the way through, I will refrain from any loctite.
Will have to see what mine is once I remove that backing plate again.
TJ |
Inside the chamber of that stud hole is the end of the axle with a circlip on it.
And the chamber is this big around it. (the rough area)
You could feed-push a cotton butcher's twine, the kind for tying turkey and chicken legs to bake, into the hole and keep cramming it till it takes no more. Now use a next size up SAE tap to thread it. Use the stud of that size.
Vacuum and clean the heck out of the threads till immaculate. Pull out the string. Clean more. Install the stud with JB Weld on the threads and let it squish out.
This would be a patch for now. |
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amishman
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| Posted: Mon May 05, 2025 8:24 am Post subject: Re: Advice Needed - 67 Rear Backing Plate to RGB Bolt Stud Stripped |
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Update... the new Wolfsburg West RGB Studs worked and no need for me to fix the threads, but wanted to note a finding.
Picture of the new (and old) RGB Stud that the backing plate goes on to.
The new is from Wolfsburg West and the old is the one with the nut on it.
As you can see overall size is the same but the threads on the side that screws into the RGB is a tad shorter so in the end the opposite side sites out a tad further.
Should not be an issue but figured I would point it out.
I don't see that it would get in the way sitting out a tad farther.
Anyway, I slowly continue on now working on my rear brakes. lol
TJ
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