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Thread: How to remove broken exhaust stud

  1. #11
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    Just to add an old school method of a stuck fastener I had heard of years ago.

    Heat up the fastener and take a candle and melt it around the hot threads.

    It does work. You can google it too.

    The acetone mixture that Rich mentioned I had read the same article and that also works.

    WD-40 is useless in these cases.

  2. #12
    Senior Member DMC-81's Avatar
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    Quote Originally Posted by JETS 81 DMC View Post
    Just to add an old school method of a stuck fastener I had heard of years ago.

    Heat up the fastener and take a candle and melt it around the hot threads.

    It does work. You can google it too.

    The acetone mixture that Rich mentioned I had read the same article and that also works.

    WD-40 is useless in these cases.
    Yeah, that candle trick is the method I linked to in my exhaust refurb thread above. It worked well. And yes, WD-40 is more of a lubricant rather than a penetrating fluid. WD-40 works for me, but definitely, one can evaluate the level of the rust they are dealing with and use their favorite penetrating product.

    Coreydmc, I'm glad you got them out. That's a tedious task for sure.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  3. #13
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    Here is a crazy question. On the manifold head studs which length goes into the head the shorter or longer? The ones I have from DMCH are 10mm threads on the short side, 18mm long side and 10mm smooth no threads in the middle. I thought the short side goes in the head, but 10mm doesnít seem like enough bite...

  4. #14
    Senior Member DMC-81's Avatar
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    Quote Originally Posted by coreydmc View Post
    Here is a crazy question. On the manifold head studs which length goes into the head the shorter or longer? The ones I have from DMCH are 10mm threads on the short side, 18mm long side and 10mm smooth no threads in the middle. I thought the short side goes in the head, but 10mm doesnít seem like enough bite...
    I installed the shorter (10mm) side in the head:

    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  5. #15
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    Quote Originally Posted by DMC-81 View Post
    I installed the shorter (10mm) side in the head:

    Did you use any sealant on the studs going into the head?

  6. #16
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    Never Seize. Use liberally on all of the exhaust hardware but be careful, it can get messy.
    David Teitelbaum

  7. #17
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    Thanks Dave! I forgot to ask should I use RTV on the exhaust manifold gaskets or leave dry? If I use sealant is it on both sides?

  8. #18
    Senior Member DMC-81's Avatar
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    Quote Originally Posted by coreydmc View Post
    Thanks Dave! I forgot to ask should I use RTV on the exhaust manifold gaskets or leave dry? If I use sealant is it on both sides?
    Hi. No sealant on the studs, but like David said, Never Sieze.... but I would caution you to not apply too much. Otherwise you'll increase the risk of the studs backing out under vibration. I recently had that happen after a few months on my daily driver engine rebuild. What a pain to retighten them in the car:



    I used high temperature RTV (red colored) on the gaskets, both sides, as shown. If you want more detail, I outlined that in the thread I linked to above.



    Good luck with the job.
    Last edited by DMC-81; Today at 05:15 PM.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

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