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Thread: Broken crownwheel bolt, replace 1 or all? where to buy?

  1. 24th July 2013, 04:01 PM #1
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    Broken crownwheel bolt, replace 1 or all? where to buy?

    Hi all. I found the source of the crunching and grinding I was hearing from the rear diff... A bolt had snapped off on the crownwheel and was free floating, making some horrible noises. Diff is 345k old. No damage to any of the gears etc.

    Should I replace all the bolts? What are the torque settings for them (workshop manual does not show it) Any idea where to get them? Microcat evidently does not show them.

    Thanks
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    Regards, Will

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  2. 24th July 2013, 04:10 PM #2
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    replace them all
    looks overtightened to me

    Land Rover Parts - 17: BOLT (M12 x 30) - CROWN WHEEL PINION - R/ROVER
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  3. 24th July 2013, 04:23 PM #3
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    Thanks, was thinking of replacing them all if I can find them, and at a reasonable price.

    The link you posted is to Disco 1 bolts. The D2 bolt is shorter and has knurling on the mating face to act as a lock, as shown in the pics... It seems that their part number is FTC5150, with a torque setting of 60nm
    Regards, Will

    Stornoway Grey '09 D3 TDV6 SE, 2015 TERRITORY Engine at 348k
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  4. 24th July 2013, 04:28 PM #4
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    Replace them all...

    while your buying the bolts buy a thread chaser of the same thread to ensure that all the threads that your bolting into are still sound.

    I got my last lot of diff bolts from GM Bolt but they are up here in Queensland.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

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  5. 24th July 2013, 05:17 PM #5
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    Quote Originally Posted by Blknight.aus View Post
    Replace them all...

    while your buying the bolts buy a thread chaser of the same thread to ensure that all the threads that your bolting into are still sound.

    I got my last lot of diff bolts from GM Bolt but they are up here in Queensland.
    Is this the kind of thing you mean? Hand Tap Chrome Alloy 3/8" UNF - Classic Fasteners
    A quality 3/8 UNF intermediate thread tap?
    Regards, Will

    Stornoway Grey '09 D3 TDV6 SE, 2015 TERRITORY Engine at 348k
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  6. 24th July 2013, 05:39 PM #6
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    more like that but yes an intermediate tap will do, just be very careful with starting the tap if the thread is damaged if you misalign the tap or mis seat it on the damaged thread you can wind up in a world of hurt.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
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  7. 24th July 2013, 06:06 PM #7
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    Great info Dave, thanks a lot. Any idea where to get a 3/8 UNF thread chaser? I can't imagine it'd be a common stock item...
    Regards, Will

    Stornoway Grey '09 D3 TDV6 SE, 2015 TERRITORY Engine at 348k
    LLAMS, FYRLYTS, OL D4 Bar
    Safari Snorkel, D4 hitch, ARB CKMA12
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  8. 24th July 2013, 06:17 PM #8
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    try A & A Industrial supplies.
    17 London Dr
    Bayswater
    (03) 9762 9322

    they will most likely have your bolts too.
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  9. 24th July 2013, 06:18 PM #9
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    any decent tools shop will have them, Ive even seen them at bunnings.

    Most good nut and bolteries will also have them (GM bolt and Nutz and boltz are my two local suppliers of all things thready)
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
    If you think you're in front on the deal, pay it forwards.
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  10. 24th July 2013, 06:31 PM #10
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    Thanks guys, I know A&A well. I'm concerned about using non genuine bolts. Are there any issues with doing this? I don't want to cause clearance issues etc.
    Regards, Will

    Stornoway Grey '09 D3 TDV6 SE, 2015 TERRITORY Engine at 348k
    LLAMS, FYRLYTS, OL D4 Bar
    Safari Snorkel, D4 hitch, ARB CKMA12
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