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Thread: Need welding nut on broken bolt to extract

  1. #1
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    Need welding nut on broken bolt to extract

    Is anyone in the Kitchener area with a welder available to help weld a nut on a broken exhaust manifold bolt so I can pull it out of my block? Cash or beer (or both!).

    Removing exhaust manifold on my Mazda and broke a bolt, thereís about 3/8Ē sticking out of the block. The other 13 came off with impact but I tried to ratchet this one off and busted it. It was liberally PB blasted, Iíve tried heating with Map/Pro, vise grips, bought a stud extractor from PA to not avail. This sucker wonít move and I suspect a nut welded to the stud is the only way to get enough torque on it. Unfortunately I donít have a welder or any know how about it.

    Someone willing to help a brotha out?
    2001 TJ 4L 60th Anniversary
    1990 Jeep YJ Laredo 258 <- SOLD!
    1996 Mazda MX6 LS V6
    1988 Mazda MX6 GT turbo <- SOLD!

  2. #2
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    an old millwright trick is to use a pipe wrench on the stud instead of vise grips, a pipe wrench will keep biting deeper as more preasure is applied while vise grips will just slip and remove material. btw i have a welder but i'm 1.5 to 2 hours away from kitchener
    WHAT WOULD MACGYVER DO?

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  3. #3
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    give it a few raps with a hammer too while turning it with a pipe wrench

  4. #4
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    another thing that has worked for me is using a left handed drill bit. when the bit bites into the broken stud it will actually unscrew it from the block. most tool suppliers sell them

  5. #5
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    Thanks man! Good tips. I think this thing needs too much torque for those tricks though. Womp womp.

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