Author [NL] [FR] [ES] [DE] [SE] [IT] Gear Shift Pivot Bolt Replacement  (Read 1896 times)

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  • Offline darmah59   us

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    Gear Shift Pivot Bolt Replacement
    on: Jun 21, 2023, 09.29 pm
    Jun 21, 2023, 09.29 pm
    Started to dismantle the LH cover to get access to the gear shift pivot bolt. The three torx fasteners started to loosen then locked up so tight I was afraid of them breaking or stripping the drive.
    What do these thread into? Have other people seen this? What can I do to make this process easier?

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    Re: Gear Shift Pivot Bolt Replacement
    Reply #1 on: Jun 21, 2023, 10.46 pm
    Jun 21, 2023, 10.46 pm
    I think those are patchlocked, like a few others on the Trophy.  You might try using a high output soldering iron placed in the hex head for a bit to get just a little heat on the thread compound and allow it to release enough to remove them.  I'm not a fan of this patchlock material.  There are thread locking compounds that will hold but are also removable more easily.  I know why they do it, they can apply it and it will stay on the threads in a dry state and still work as intended.  I'll take a drop of Loctite any time, not red though unless it's never coming apart again!
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  • Offline darmah59   us

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    Re: Gear Shift Pivot Bolt Replacement
    Reply #2 on: Jun 21, 2023, 10.48 pm
    Jun 21, 2023, 10.48 pm
    Thanks good idea, was wondering how to heat it up as the holes are blind and the cover is painted.

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    Re: Gear Shift Pivot Bolt Replacement
    Reply #3 on: Jun 22, 2023, 06.34 am
    Jun 22, 2023, 06.34 am
    If you are going to use an electric welder, be very aware of disconnecting the battery, otherwise the ECU may suffer significant damage.

    On the other hand, place something to protect the aluminum part where the screws are housed, since due to the heating, part of the aluminum can dissolve.
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    Re: Gear Shift Pivot Bolt Replacement
    Reply #4 on: Jun 22, 2023, 06.55 am
    Jun 22, 2023, 06.55 am
    Yes those bolts are "patch locked" with a type of thread locking compound.

    Make sure a good quality, preferably new, and definitely unworn tool
    is used so that it does NOT slip in the head of the bolt !

    The bolts screw into the machined engine casing.

    If the bolts won't come out after some careful screwing back in and out again,
    the application of heat may be the best answer to soften the locking compound.

    I've not tried this myself, but have heard others recommend the use of a fine pencil blowtorch
    and placing a suitable size socket over the head of the bolt, so the flame can be directed through the socket
    more accurately onto the bolt head, and not the surrounding panel.  Wear protective gloves !

    How much heat to apply will be a case of trial and error - just take it easy a little at a time.

    Cheers, and good luck !  :159:




  • Offline darmah59   us

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    Re: Gear Shift Pivot Bolt Replacement
    Reply #5 on: Jun 22, 2023, 02.46 pm
    Jun 22, 2023, 02.46 pm
    Many thanks, not so many years ago I would have just brute forced them out and probably regretted it.
    While I dont have an issue with the bolt I have a couple of spares so thought a preventative maintenance might be good after 50,000 miles.

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    Re: Gear Shift Pivot Bolt Replacement
    Reply #6 on: Jun 22, 2023, 02.50 pm
    Jun 22, 2023, 02.50 pm
    There is a product available from welding supply sources called "Heat Fence".  It's a paste type material that can be applied to a part that prevents heat passing through it and may be the best solution to apply heat to the bolt.  Should remove fairly easily once the job is finished.
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    Re: Gear Shift Pivot Bolt Replacement
    Reply #7 on: Jun 22, 2023, 05.56 pm
    Jun 22, 2023, 05.56 pm
    When you do replace them - make sure you clean the threaded holes out
    and remove as much of the old bits of thread lock compound as possible.

    If you have an M8 x 1.25 Tap, it's worth running it in and out of the holes a few times.

    When I replaced mine I removed all traces of the compound
    from the new bolts and didn't use any other product on them. 

    I torqued them up to the original Spec of 25Nm
    and check them regularly - they have never worked loose !

    Cheers  :821:


     



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