Interior 2nd Gen Harness install questions

Discussion in 'Tuning and Performance' started by BThayer23, Apr 30, 2012.

  1. BThayer23

    BThayer23 Well-Known Member

    Jun 12, 2009
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    Hey guys, I'm planning on installing a harness in a friend's R56. Does anyone know the socket size and bolt torque on the front and rear seat belt anchor bolts? I don't have an R56 Bentley manual. Thanks!
     
  2. ScottinBend

    ScottinBend Space Cowboy
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    Is this the Schrothh harness?
     
  3. BThayer23

    BThayer23 Well-Known Member

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    Yes, and I plan on trimming the plastic off the buckles.
     
  4. Crashton

    Crashton Club Coordinator

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    When I get home this afternoon I'll check the size for you.
     
  5. Crashton

    Crashton Club Coordinator

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    OK & the answer is T50. At least that is the size on Babs Clubster which I assume is the same.

    If you need a good set of torx bits NAPA sells a nice set of impact bits. They call them star bits. About $38 or so.
     
  6. Metalman

    Metalman Well-Known Member
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    Yes.... on the torque question....
    Its a M10 bolt used at all three locations: set at 36 Nm (27 ft-lb)
    the seat belt anchor to body
    the seat belt reel to B-pillar
    the seat belt to B-pillar

    With a note to use Locktite with new bolts.
    It doesn't give the torx bit size to use though.
     
  7. BThayer23

    BThayer23 Well-Known Member

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    Cool, thanks guys! I have a T50; that's the same as the bolt on the R53. I thought the torque was going to be a bit higher, but that's cool. I can do 27 ft-lbs by hand.
     
  8. Crashton

    Crashton Club Coordinator

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    IIRC that is a very fine pitched bolt. Maybe that is why the torque value is lower than expected.
     
  9. goaljnky

    goaljnky New Member

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    Oh, cool, I get to use this again:
     
  10. Metalman

    Metalman Well-Known Member
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    I expect it's a underhand slow pitched bolt.....:D
     
  11. BThayer23

    BThayer23 Well-Known Member

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    Thanks for the equation and the torque spec. I decided to just do it by feel because I packed the big torque wrench that starts at 25 ft-lbs, it wasn't too bad. :fingerscrossed:

    The hardest part is keeping the buckles from rotating too much when you tighten the bolt. New harnesses come with a new bolt and washer that eliminates this issue, but these were used equipment so I reused the stock bolts. Cutting the plastic off was easy, definitely required a Dremel, and had zero structural impact on the integrity of the buckle.
     
  12. ScottinBend

    ScottinBend Space Cowboy
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