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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, heads/cams/exhaust, EFI
    1999 Corvette, heads/cam/exhaust, 440 BHP
    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 03:41 AM.
    Dana

    Delorean status: CECF 2017 Platinum Award winner. Still tinkering...

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