Concorde Lug Nut Question

Discussion in 'Concorde' started by Jim, May 6, 2004.

  1. Jim

    Jim Guest

    The dealer put my wheels on, so I tested the torque of all of the lugs
    (Chrysler spec: 100 ft-lb) when I got home. A few were somewhat over
    spec, but nothing too terrible. What I noticed though is that the lugs
    and wrench tend to studder when approaching the desired tightness. I
    don't recall this happening before, usually the lugs would tighten
    smoothly as the torque meter approached 100. Does anyone know why this
    happens and if it is a problem? Thanks.
    Jim, May 6, 2004
  2. Jim

    Bill Putney Guest

    Using the wrong size wrench and it's slipping on the nuts?

    Bill Putney
    (to reply by e-mail, replace the last letter of the alphabet in my
    address with "x")
    Bill Putney, May 6, 2004
  3. Jim

    Art Guest

    You should read your instructions for the torque wrench. Some have to
    approach the right torque and won't click or read correctly if the right
    torque is already exceeded. In other words they cannot be used to check if
    someone already overtorqued the nut.
    Art, May 6, 2004
  4. Jim

    Matt Whiting Guest

    It is due to the lug nuts being dry. Could be the dealer hit them with
    solvent to make sure they were clean and dry. Even though it isn't
    recommended, I tend to spray a little WD-40 on mine after I install the
    nuts. This usually leaves enough residue so that they don't shudder
    next time I torque them down.

    Matt Whiting, May 6, 2004
  5. Jim

    Richard Guest

    It is due to the lug nuts being dry. Could be the dealer hit them with
    The published torque spec assumes dry nuts and studs.

    Richard, May 7, 2004
  6. Jim

    Gene Poon Guest

    True. Don't lubricate the studs and nuts, but lightly wire brush them
    to remove dust and grit accumulation, particularly brake dust.
    Gene Poon, May 7, 2004
  7. Jim

    Matt Whiting Guest

    I know. That is why I said "it isn't recommended" above.

    Matt Whiting, May 7, 2004
  8. Jim

    Jim Guest

    I was using the right size socket (14 mm) and the fit was fine. Previously
    when I've rotated my tires, I 've usually found that the lugs tightened
    smoothly to the proper torque, that's why I was surprised here. Thanks!
    Jim, May 9, 2004
  9. Jim

    Jim Guest

    I don't think that's the issue. You are correct that you can only measure the
    torque while the bolt is moving, but to measure, I loosened slightly until the
    lug moved, than retightened, all while watching the torque reading. I did this
    in the usual star pattern to all of the 5 lugs on each wheel.

    What happened is that the lugs shuddered while tightening ( and while
    loosening). Because I"ve never experienced that before, I am curious if it
    means something is wrong.

    Jim, May 9, 2004
  10. Jim

    Matt Whiting Guest

    I experience that often with dry lug nuts and studs, so I don't think
    you have anything wrong. Just the nature of the beast. That is why
    virtually all fasteners other than lug nuts must be lightly lubricated
    before torque is applied. Lug nut torque is specified for clean and dry

    Matt Whiting, May 10, 2004
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