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Thread: Head bolts - what now?

  1. #1
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    Head bolts - what now?

    Hi Guys

    Just putting the disco back together after doing the head and having a world of life interruptions

    Got the head back on it and done the first 3 sequences to torque down the head and was dragged away for a week, came back to finish it today and setup the torque angle gauge and started cranking in order

    By bolt 7, realised the angle gauge was slipping and some were 180 some may have been 200 - 220 degrees

    After pulling apart the gauge it’s easy to see why, Kincrome, SP Tools and Repco don’t keyway or secure the socket to the gauge dial so when torque gets up there, it spins without incrementing.

    Do I pull all the head bolts and start again, progress with final torque to 45 degrees, back them off to the 2nd stage and try again or???

    Bolts are new

    Rob

  2. #2
    Tombie Guest
    Once you undo them they’re throw away.

  3. #3
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    Hey Tombie

    So maybe finish the torque up and suck it and see?

    Rob

  4. #4
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    What size socket do you need? As I used Standley 6 pointed one or 12 pointed one and three of the head bolts stripped, how do I take them off?

  5. #5
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    Quote Originally Posted by Kaaaiju View Post
    What size socket do you need? As I used Standley 6 pointed one or 12 pointed one and three of the head bolts stripped, how do I take them off?
    As in a rounded off hex head?

    Kinchrome make a locking type socket that seems to work really well, or you could use a stud extractor if it opens up enough, they cam on, the harder you turn, the more they bite.

  6. #6
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    Quote Originally Posted by Kaaaiju View Post
    What size socket do you need? As I used Standley 6 pointed one or 12 pointed one and three of the head bolts stripped, how do I take them off?

    Not surprised they stripped, they need E sockets ( E14 specifically)

  7. #7
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    Quote Originally Posted by itsme_wrk View Post
    Hi Guys

    Just putting the disco back together after doing the head and having a world of life interruptions

    Got the head back on it and done the first 3 sequences to torque down the head and was dragged away for a week, came back to finish it today and setup the torque angle gauge and started cranking in order

    By bolt 7, realised the angle gauge was slipping and some were 180 some may have been 200 - 220 degrees

    After pulling apart the gauge it’s easy to see why, Kincrome, SP Tools and Repco don’t keyway or secure the socket to the gauge dial so when torque gets up there, it spins without incrementing.

    Do I pull all the head bolts and start again, progress with final torque to 45 degrees, back them off to the 2nd stage and try again or???

    Bolts are new

    Rob
    I'd be buying 7 new bolts , but you might be OK to back off to stage 2 depending on how far you actually went ,
    Whatever you do always mark the bolt head with a fine paint pen before doing the angle stages in the same relative spot ( eg front of the flange on the bolt head all facing forwards ) so you know with a glance which ones are done

  8. #8
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    Quote Originally Posted by discorevy View Post
    I'd be buying 7 new bolts , but you might be OK to back off to stage 2 depending on how far you actually went ,
    Whatever you do always mark the bolt head with a fine paint pen before doing the angle stages in the same relative spot ( eg front of the flange on the bolt head all facing forwards ) so you know with a glance which ones are done
    Thanks for that, new complete set of bolts ordered, should be here tomorrow.

    Remove all, replace, re-torque in sequence or just one by one?

    Trying to avoid having to lift the head off again, engine has not been started.

    Rob

  9. #9
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    Quote Originally Posted by itsme_wrk View Post
    Thanks for that, new complete set of bolts ordered, should be here tomorrow.

    Remove all, replace, re-torque in sequence or just one by one?

    Trying to avoid having to lift the head off again, engine has not been started.

    Rob
    ALLWAYS in sequence by the book.

  10. #10
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    Back off the ones you angled wrong first, one by one by 180 degress in reverse sequence ,then back them all off by 90 , getting back to stage 2 on all of them , then replace with the new bolts, one by one in sequence back up to stage 2 , omitting stage 1 , this will keep even tension on the head also keeping the gasket crushed, don't forget to mark the bolt flanges before the last stages.

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