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robcurtis2
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Joined: March 31, 2006
Posts: 234
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 Posted: Fri Aug 16, 2019 5:52 am Post subject: Stripped Exhaust Stud In Head |
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Hi all,
So had an exhaust leak and noticed that manifold on cylinders #1 and #3 will not seat flat on to the head. As I was pulling the whole exhaust system off, bloodied knuckles, a few hockey bench words, and one nut that wont loosen yet, I noticed that top stud on #3 wiggles and I believe the threads are stripped. What are my options out there without pulling the motor?
Thanks in advance.
RC |
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robcurtis2
Samba Member
Joined: March 31, 2006
Posts: 234
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| Posted: Fri Aug 16, 2019 6:39 am Post subject: Re: Stripped Head Stud |
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| This issue is on my 84' Tintop 1.9L Vanagon. |
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AtlasShrugged
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Joined: October 30, 2008
Posts: 1605
Location: Decatur, Ga. USA
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| Posted: Fri Aug 16, 2019 7:00 am Post subject: Re: Stripped Head Stud |
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I noticed that top stud on #3 wiggles and I believe the threads are stripped
You may want to post a picture. If a head stud is wiggling there should be coolant leaking out too? Coolant flows around the studs. |
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robcurtis2
Samba Member
Joined: March 31, 2006
Posts: 234
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| Posted: Fri Aug 16, 2019 7:04 am Post subject: Re: Stripped Head Stud |
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| negative on the coolant leak |
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AtlasShrugged
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Joined: October 30, 2008
Posts: 1605
Location: Decatur, Ga. USA
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| Posted: Fri Aug 16, 2019 7:07 am Post subject: Re: Stripped Head Stud |
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May not be a "head stud". As in cylinder head holding stud. Coolant would be flowing.
Post a pic? |
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MarkWard
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Joined: February 09, 2005
Posts: 17155
Location: Retired South Florida
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| Posted: Fri Aug 16, 2019 7:10 am Post subject: Re: Stripped Head Stud |
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I think they are describing an exhaust manifold head stud.
There are "step" studs that can work short of installing a timesert preferred or a helicoil.
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robcurtis2
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Joined: March 31, 2006
Posts: 234
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| Posted: Fri Aug 16, 2019 7:26 am Post subject: Re: Stripped Head Stud |
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| Correct. Its the exhaust manifold stud that wiggles and I believe is stripped. |
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MarkWard
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Joined: February 09, 2005
Posts: 17155
Location: Retired South Florida
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| Posted: Fri Aug 16, 2019 7:37 am Post subject: Re: Stripped Head Stud |
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Time to remove the exhaust and see what you got there. I have seen bolts used in place of studs. Not sure if those are factory or not, but a bolt would allow you to remove the exhaust completely assembled. The problem with bolts is in this application trying to start a bolt with the exhaust assembled is a difficult task. Its easy to cross thread a steel bolt in aluminum.
As I said, time to take it apart and see what you got. A loose stud is way easier to deal with than a snapped stud.
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robcurtis2
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Joined: March 31, 2006
Posts: 234
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| Posted: Fri Aug 16, 2019 5:28 pm Post subject: Re: Stripped Head Stud |
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| So any ideas on what the best fix for a stripped manifold stud is by chance? |
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jlrftype7
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Joined: July 24, 2018
Posts: 3582
Location: Chicago
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| Posted: Fri Aug 16, 2019 6:53 pm Post subject: Re: Stripped Head Stud |
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| robcurtis2 wrote: |
| So any ideas on what the best fix for a stripped manifold stud is by chance? |
. Can you remove the stud and take a decent picture of the damage?
As posted, Helicoil or bushing insert might be possible, depends on how much room you have to work with since either one requires drilling oversized hole, threading, then installing the repair
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Steve M.
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Location: Fort Lauderdale, Fl.
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| Posted: Fri Aug 16, 2019 7:24 pm Post subject: Re: Stripped Head Stud |
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You should have enough room to carefully drill the stud hole to install a Helicoil there if you can safely jack the body up high enough to work.
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4Gears4Tires
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Location: MD
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| Posted: Fri Aug 16, 2019 8:23 pm Post subject: Re: Stripped Head Stud |
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| robcurtis2 wrote: |
| So any ideas on what the best fix for a stripped manifold stud is by chance? |
We can answer this question as soon as you post a picture of what it looks like. Everyone is asking for a picture for a reason, it's the best way to give you the best shot at repairing this with the least amount of effort. 
Helicoil, time sert, and retapping are all options. If you're not a purist, retapping with a slightly larger SAE size (no drilling required) could be the simplest solution.
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djkeev
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MarkWard
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Joined: February 09, 2005
Posts: 17155
Location: Retired South Florida
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| Posted: Sat Aug 17, 2019 6:45 am Post subject: Re: Stripped Exhaust Stud In Head |
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I’ll repeat myself. You need the exhaust removed and the offending stud removed. Then you can assess what it will take to repair. Your likely not going to be able to fix it with the exhaust in place.
And since you are asking about how to fix this, you may want to consider having it done. Any option is going to require tools beyond simple hand tools, a tap with a proper sized drill and the ability to drill a straight hole with a hand drill. Or you will need a specific repair kit for the metric size you are repairing using a time sert or helicoil.
If you don’t get it right, it may end up costing you more if you can find someone to take it on. Good luck.
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Gauche1968
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| Posted: Sat Aug 17, 2019 7:21 am Post subject: Re: Stripped Exhaust Stud In Head |
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| MarkWard wrote: |
If you don’t get it right, it may end up costing you more if you can find someone to take it on. Good luck. |
Good point. I have had VW specific shops turn down this repair for fear of "opening a can of worms."
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robcurtis2
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Joined: March 31, 2006
Posts: 234
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| Posted: Sat Aug 17, 2019 7:31 am Post subject: Re: Stripped Exhaust Stud In Head |
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Okay Okay now....Ha! So Im planning on taking the whole exhaust system off and once I getrr off I will take a picture. I soaked the frozen nuts last night with penetrating oil so hopefully we can see if they can come off without any cans of worms starting to open up.  Will post soon. Thanks yall.
Cheers,
RC |
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markswagen
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Location: san diego
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| Posted: Sat Aug 17, 2019 8:09 am Post subject: Re: Stripped Exhaust Stud In Head |
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split the nut, use a very sharp chisel, a few taps with a hammer and chisel should get the nut off, then you can see what's going on.
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robcurtis2
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Joined: March 31, 2006
Posts: 234
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| Posted: Sat Aug 17, 2019 9:55 am Post subject: Re: Stripped Exhaust Stud In Head |
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| and afa a Vanagon Mechanic in Montana? The only one here that works on European autos said negative on anything like pulled studs ect. So that means that I get to work on the ol' van myself again. |
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djkeev
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MarkWard
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Joined: February 09, 2005
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Location: Retired South Florida
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| Posted: Sat Aug 17, 2019 3:56 pm Post subject: Re: Stripped Exhaust Stud In Head |
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I’d be hesitant to take in this job for a new customer. If the van was in decent shape and the customer had a complete new exhaust to install, I’d be more inclined. It would be straight time labor and generally 1.0 hours per broken/seized/stripped fastener. Dealing with a problem fastener and reusing a rusty warped exhaust is just not worth the head ache.
To the original poster, take your time. The more time you spend, the less time it will take. Good luck.
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