Head gasket overtorque............ :(

Discussion in 'PSI Superchargers Tech Questions' started by GregM784, Sep 21, 2009.

  1. GregM784

    GregM784 Member

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    In retorquing my heads, i zeroed my wrench when i finished one side, and then loosened a stud on the other side and started pulling to retorque. I then realized it wasn't set. I suspect i torqued about 100-110#s on ONE stud.I imediately loosened it and set the wrench and retorqued.

    Questions:

    1. replace stud or is 110# not going to hurt it?
    2. replace gasket or did i not hurt it?

    Little M Iron block, ARP studs/12pt hardware, SCE copper gaskets, & o-rings

    Thanks for the advice (i feel like a mellon head)
     
    #1
    GregM784, Sep 21, 2009
  2. secondwindracing

    secondwindracing top alcohol

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    just my 2 cents...ok...I don't think you have anything to worry about if I was you I would take out another stud and mic it to see if there was some strech....good luck Dave
     
    #2
    secondwindracing, Sep 21, 2009
  3. GregM784

    GregM784 Member

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    Thanks Dave. No damage to the copper? I think the stud is ok, i was more mentally worried about the copper. :)
     
    #3
    GregM784, Sep 21, 2009
  4. clint thompson

    clint thompson Member

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    head torque

    we torque our heads to 225# using Hussey .060 gaskets. You aren't going to hurt the gasket at 110#
     
    #4
    clint thompson, Sep 28, 2009
  5. Eric David Bru

    Eric David Bru Member

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    :eek:

    :eek:
     
    #5
    Eric David Bru, Sep 28, 2009
  6. Randy G.

    Randy G. Top Alcohol

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    You must have some big fellas over there.
     
    #6
    Randy G., Sep 28, 2009
  7. JP

    JP Member

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    and some HUGE bolts!!!:D
     
    #7
    JP, Sep 28, 2009
  8. GregM784

    GregM784 Member

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    Thanks all. We ran the car on Sunday, runs awesome.

    Of course, when a glide drives thru high gear, it makes a mess in the pan...tore the trans apart tonight....it's always somethin
     
    #8
    GregM784, Sep 28, 2009
  9. crashly

    crashly Member

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    yeeh,
    tell me about it
     
    #9
    crashly, Sep 28, 2009
  10. Mike Canter

    Mike Canter Top Dragster
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    Crashly, what was the specified torque on the bolt...85 ft lbs? In the aircraft business if a bolt is over torqued it has to be replaced. One time we found a torque wrench out of calibration in the tool room and had to have them go back on numerous aircraft engine mounting bolts and change them. When that happened we all started talking about it and what was said is that a bolt can take a certain percentage of over torque and be OK but if over a certain percentage then the bolt is over streatched and becomes brittle and may break sometime later. The problem is knowing what this allowable percentage is. Since the bolt is not holding a wing or engine on a plane I would say you are probably OK.
     
    #10
    Mike Canter, Sep 29, 2009
  11. crashly

    crashly Member

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    Mike,
    you ment Greg....????

    and yes, i agree with you on the aircraft comment. my father has 2 planes....
     
    #11
    crashly, Sep 29, 2009
  12. Mike Canter

    Mike Canter Top Dragster
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    Sorry, typing too fast and not thinking.
     
    #12
    Mike Canter, Sep 29, 2009
  13. Woodchip

    Woodchip Top Alcohol Dragster

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    #13
    Woodchip, Sep 29, 2009
  14. crashly

    crashly Member

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    sounds like you been drink aussie bundy rum ???
    lol
     
    #14
    crashly, Sep 29, 2009

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