Clutch Slave Cylinder Bolt Size

Discussion in 'Technical' started by SuperZ, Nov 2, 2015.

  1. SuperZ

    SuperZ Resident Z lunatic

    Hey all

    Bought a gearbox to find that the M10 clutch slave cylinder bolt threads have been stripped. There is not even any thread left in both holes to even compare :(

    One of the existing bolts left behind was M10 X 1.25 but I have no guarantees this is correct, given it could even be the cause of the stripped threads itself.

    So I am wondering if anyone can confirm whether it's a 1.25mm or a 1.5mm thread pitch

    A search implied that the infiniti clutch cylinder slave bolts were M10 X 1.25mm but whether they are the same, I don't actually know..............


  2. zx299

    zx299 Well-Known Member

    One would assume 1.25.....

    as most zed stuff (actually most Nissan stuff) is 1.25

    In reality, it won't make much difference to you..... if your threads are stripped you'll need to go oversize anyway (or use a helicoil) :cool:
  3. CHILI

    CHILI Indestructable Target

    The smart money would be on using Heli-Coils to maintain the original thread size(plus you will NEVER strip them again).:p:br:
    I have a Heli-Coil Kit here if you need it desperately(as long as I get it back).:zlove:(Where are you located?). PS. My Kit is an M8 item so check to make sure you need an M10.:zlove:
  4. SuperZ

    SuperZ Resident Z lunatic

    Heli coil shananigans and saving money

    Cheers Chilli!

    All good mate!

    I generally find that even with stripped threads that re- tapping a poor thread can often work 50% of the time and get you to the torque specs. (which probably explains why one worked and one didn't :rofl:)

    The reason why I was after the thread pitch was for the re- tapping and I also like to keep the same bolt thread as the OEM

    Given I had to do one, I decided to do both in the end because as you point out - it will not strip and hold a better torque than the original and if its worth doing - its worth doing properly

    On a side note: The M10 X 1.25mm Heli-coil requires a 10.25mm - 10.4mm drill bit and so a 13/32 drill bit will do the job nicely. The heli coil itself requires a M12 X 1.25mm pitch tap and the heli coil can be inserted easily with a screw driver.

    The heli coil manufacturers won't list the sizes on their parts or cases, so that you don't know the sizes and are forced to buy their kits at a stupid price! :rolleyes:

    The kit with 10 heli-coils is about $120+ whereas if you buy the M12 / 1.25tap/ 13/32 drill and ten heli-coils separately - it costs less than $50 :cool:

    Appreciate your kind gesture regardless ! :thumbup:

    Cheers and Regards

  5. CHILI

    CHILI Indestructable Target

    If you need it, I have the proper HeliCoil inserting tool that also makes it easy to snap-off the small tag/lock once the coil is in place(so that the HeliCoil insert won't come loose at some future point-in-time).:zlove:

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