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borna428
Samba Member
Joined: December 18, 2018
Posts: 356
Location: FL
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 Posted: Mon Dec 12, 2022 9:05 pm Post subject: question regarding rocker arm replacement studs |
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Hi all,
I had a damaged rocker arm stud, which only the 8MM portion of the stud was damaged.
I ordered new studs and removed the bad one. Now when I try to screw the new stud in, it won't go in more than 2 turns. I checked the threads and both the old and the new are 10MM x 1.5.
I tried to screw in the old stud and goes in fine. Why both studs are 10MM x 1.5 and the new one won't go in more than 2 turns? what can I do to fix the issue? Should I re tap the stud hole? |
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rcroane 
Samba Member
Joined: January 03, 2013
Posts: 2000
Location: Springfield, Virginia
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| Posted: Tue Dec 13, 2022 4:08 am Post subject: Re: question regarding rocker arm replacement studs |
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| borna428 wrote: |
Hi all,
I had a damaged rocker arm stud, which only the 8MM portion of the stud was damaged.
I ordered new studs and removed the bad one. Now when I try to screw the new stud in, it won't go in more than 2 turns. I checked the threads and both the old and the new are 10MM x 1.5.
I tried to screw in the old stud and goes in fine. Why both studs are 10MM x 1.5 and the new one won't go in more than 2 turns? what can I do to fix the issue? Should I re tap the stud hole? |
Instead of tapping the hole, maybe use a thread chaser on the new stud and the hole.
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'65 Sunroof Bug |
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Tue Dec 13, 2022 7:02 am Post subject: Re: question regarding rocker arm replacement studs |
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If the old stud goes in fine that indicates there could be nothing wrong with the threads in the head.
You don't want to run a tap in because that may remove too much metal.
As suggested if anything only run a thread restorer in there.
Try running a 10m x 1.5 nut onto the new stud to verify it's diameter and pitch is okay.
By the way, I believe Everett and the Mods would have you reopen your old topic about removing the studs rather than starting a new one everytime you have another question...
https://www.thesamba.com/vw/forum/viewtopic.php?t=775514
_________________
-Bruce
An ounce of prevention is worth a pound of cure. |
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borna428
Samba Member
Joined: December 18, 2018
Posts: 356
Location: FL
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| Posted: Tue Dec 13, 2022 7:59 am Post subject: Re: question regarding rocker arm replacement studs |
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| 61SNRF wrote: |
If the old stud goes in fine that indicates there could be nothing wrong with the threads in the head.
You don't want to run a tap in because that may remove too much metal.
As suggested if anything only run a thread restorer in there.
Try running a 10m x 1.5 nut onto the new stud to verify it's diameter and pitch is okay.
By the way, I believe Everett and the Mods would have you reopen your old topic about removing the studs rather than starting a new one everytime you have another question...
https://www.thesamba.com/vw/forum/viewtopic.php?t=775514 |
well that is thing. Both new and old studs go fine into a 10mm X 1.5 nut.
Old stud goes fine into the stud threads in the head but the new stud won't.
Kind of mystery as what's going on |
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borna428
Samba Member
Joined: December 18, 2018
Posts: 356
Location: FL
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| Posted: Tue Dec 13, 2022 8:04 am Post subject: Re: question regarding rocker arm replacement studs |
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| borna428 wrote: |
| 61SNRF wrote: |
If the old stud goes in fine that indicates there could be nothing wrong with the threads in the head.
You don't want to run a tap in because that may remove too much metal.
As suggested if anything only run a thread restorer in there.
Try running a 10m x 1.5 nut onto the new stud to verify it's diameter and pitch is okay.
By the way, I believe Everett and the Mods would have you reopen your old topic about removing the studs rather than starting a new one everytime you have another question...
https://www.thesamba.com/vw/forum/viewtopic.php?t=775514 |
well here is thing. Both new and old studs go fine and smoothly into a 10mm X 1.5 nut.
Old stud goes fine into the stud threads in the head but the new stud won't.
Also I tried a 10mm x 1.5 bolt into the stud hole and that won't go in either.
I also used thread gauge and validated both studs are 10mmx1.5.
Kind of mystery as what's going on |
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