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Thread: Urgent, What grade bolt

  1. #1
    Senior Member
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    Urgent, What grade bolt

    i was installing my new speedybnz camber kit and i sheard a bolt off getting it out now the dealer is closed and i have meeting I need to be at early tommorow


    what grade is the bolts on the suspsension mainly the camber arm

  2. #2
    In Charge
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    Is it stamped on the head of the bolt? If they are, I can get you that info later tonight.
    1998 C43
    1994 C280 (Retired)

    "Simplicity is the ultimate sophistication." - da Vinci

  3. #3
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    its has two 8 side by side so i assume its an 8.

    do you know the torque specs

    also speedybnz suggest using three washers if i just get a shorter bolt because mine is snapped will that work or is there some kind of engineering behind the 3 washers ?

    are the bolts special being that there is no locker or lockwasher on the nut ? maybe there only ment to be used once

  4. #4
    Spring Master
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    Originally posted by Dr.Drew
    its has two 8 side by side so i assume its an 8.

    do you know the torque specs

    also speedybnz suggest using three washers if i just get a shorter bolt because mine is snapped will that work or is there some kind of engineering behind the 3 washers ?

    are the bolts special being that there is no locker or lockwasher on the nut ? maybe there only ment to be used once
    use locktite then, most bolts are meant to be used once. if u take it off, it needs to be replaced with new ones. but i never do it. car still running fine.

  5. #5
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    I already found all the answers except torque values

    the bolts are grade 8 with locking nuts they are only suposed to be used once but if you replace the nut each time the bolt will be fine

    the bolt can not be found at any place other then the dealer and the dealer has discontinued the bolt i have to wait two weeks to get one from germany assuming they have any left.

  6. #6
    Spring Master
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    Originally posted by Dr.Drew
    I already found all the answers except torque values

    the bolts are grade 8 with locking nuts they are only suposed to be used once but if you replace the nut each time the bolt will be fine

    the bolt can not be found at any place other then the dealer and the dealer has discontinued the bolt i have to wait two weeks to get one from germany assuming they have any left.
    i torque it till i cant torque it anymore

  7. #7
    Moderator Sulaco's Avatar
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    Originally posted by tpliquid
    i torque it till i cant torque it anymore
    lol

    That's how I torque all bolts.
    94 C280, 250k miles, 1999-2011 (gone, never forgotten)
    CURRENT:
    744 Silver 99 C43 AMG, 260k miles, 2011-
    040 Black 98 C43 AMG, 190k miles, 2013-

  8. #8
    Senior Member
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    well then, in some cases you have over torqued bolts and others not enough you should really invest in at torque wrench if you like to do your own work, this is probally why the bolt snapped off because the previous tech that worked on it over tightened it

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