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Cylinder stud removal

Discussion in 'XJ Technical Chat' started by Libertas, May 5, 2009.

  1. Libertas

    Libertas New Member

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    I am in a tough spot, I need to remove the cylinder studs out of my old case. Anyone have any insight on this? I have tried the double nut method and no such luck. Thanks

    P.S. this is on an 81 maxim 650 engine
     
  2. Robert

    Robert Active Member

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    Grab the stud at the shank with a pair of vice-grips?
    I'm going to wager that the stud is locked in place with some sort of locking compound and that needs to be heated up to get it to where it will let go. Do you have the case split? Another thought is to invest in thicker nuts (no snickering here guys, I'm serious) for more thread purchase. Try to get a higher grade nut too, like 8.8 or 10.8. The stronger, the better. Then try to double nut the stud again. Between heating the stud base and getting new hardware, we are at the limit of my knowledge. I'd be headed to a shop after that.
     
  3. dpawl31

    dpawl31 Member

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    Just an idea, but what if you could drill a hole straight through, and get something in there for leverage? Never tried it, just an idea.
     
  4. bluepotpie

    bluepotpie Member

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    not sure if i'd drill it. they are relatively thin studs. vise-grips should do the trick. heat up the base of the stud first (i know this sounds backwards, just hear me out). the stud is steel, and the case is aluminum. the aluminum dissipates the heat too quickly to have much of an effect with the heat. what you're trying to do, is get the stud as hot as you can (just beginning to turn red) then heat the aluminum around it while twisting the stud, in a rocking motion, back and forth, until it turns out more freely.

    The heat from the steel will transfer to the aluminum and since the aluminum acts as a heat-sink for the stud, and your heating the aluminum as the heat transfers from the steel, the stud will cool down faster than the aluminum. this causes the aluminum to expand as the stud cools and contracts.
     

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