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Thread: Crank pulley nut removal during engine part out

  1. #21
    Delorean Guru
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    Quote Originally Posted by Bitsyncmaster View Post
    Do you know someone with and oxygen/acetylene torch? The higher heat can get the nut heated faster without heating the crank that much.
    I agree you will get a lot more heat with an acetylene torch and an impact gun has a lot more shock than a breaker bar. You can try hitting the long pipe and breaker bar with a hand sledge but it isn't as good as an impact gun.
    David Teitelbaum

  2. #22
    Builder of the first Delorean Time Machine
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    Quote Originally Posted by opethmike View Post
    5 minutes straight of MAPP blow torch, 150 PSI on the compressor aaaaaaand - nothing.
    5 more minutes of torching, breaker bar with 12 (!!!) foot pipe aaaaaand - nothing.

    WTF now, lol?
    What's the rating on your impact gun?

  3. #23
    Not a DeLorean Guru
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    Quote Originally Posted by nullset View Post
    What's the rating on your impact gun?
    1,200 lb/ft
    -Mike
    1981 DeLorean, Carb LS4 swap completed
    1999 Corvette, cam/headers/intake manifold, 400 rwhp
    2005 Elise, stock
    2016 Chevy Cruze

  4. #24
    Senior Member DMC-81's Avatar
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    Quote Originally Posted by opethmike View Post
    5 minutes straight of MAPP blow torch, 150 PSI on the compressor aaaaaaand - nothing.
    5 more minutes of torching, breaker bar with 12 (!!!) foot pipe aaaaaand - nothing.

    WTF now, lol?
    You might as well try this:

    -Heat the nut a bit, only the nut, not the shaft.
    -Melt some candle wax into the threads. With the nut hot, the wax should be drawn into the threads
    -spray some WD-40 or equivalent on the shaft
    -Hit it with the impact wrench.
    -Repeat if necessary

    The idea is to lubricate to threads with the the wax and create a temperature differential with a hot nut and a cooler shaft so that the nut expands slightly on the shaft. I did this successfully on my rusty exhaust hardware.

    I modified the procedure from this source: https://www.youtube.com/watch?v=KFdFsfSAuyc

    Good luck.
    Last edited by DMC-81; 12-05-2017 at 02:41 AM.
    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)
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