R56 :: Hatch Talk (2007+) MINI Cooper and Cooper S (R56) hatchback discussion.
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R56 M9 thread chaser?

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Old Apr 3, 2026 | 04:56 PM
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SuperDave010's Avatar
SuperDave010
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M9 thread chaser?

I'm in the middle of a clutch job on my 2011 S hatch, and everything was going fine until I put an impact driver on a flywheel bolt that I thought I'd finger tightened <sigh>, and cross threaded the bolt hole. Nbd, I thought, I'd been meaning to get a thread chaser kit anyway. The problem is that, near as I can tell, no one in the world makes a thread chaser for an M9x1.25 bolt. I ordered a kit that claimed to contain "sizes M6 to M14", but it's missing sizes M9 and M13. I've spent about an hour scouring the interwebs, and I can find no such tool. I hate to drill it out and replace the threads if it's not necessary, but maybe there's no other way? Hoping that maybe someone here has been in the same situation and can point me in the right direction.
 
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Old Apr 3, 2026 | 06:16 PM
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bummer.

somehow my Mini seems to always do this to me too, finding myself in need of some hard-to-find esoteric off-the-wall oddball thing.

i had a quick look & yep you're right, the M9x1.25 size gets totally skipped over & does not seem to be individually available anywhere.

ebay has been my saving grace for getting this sort of hard-to-find metric tooling & have lucky on bargains for well-made quality items usually from industrial sources --- no luck with this M9 chaser

i have had excellent results with the homemade style chaser i had to make for an M12,
i was impressed with how well it worked

https://www.hagerty.com/media/mainte...thread-chaser/

very simple procedure

random pic found online, illustrates the concept well



 
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Old Apr 3, 2026 | 06:20 PM
  #3  
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Originally Posted by Oldboy Speedwell

bummer.

somehow my Mini seems to always do this to me too, finding myself in need of some hard-to-find esoteric off-the-wall oddball thing.

i had a quick look & yep you're right, the M9x1.25 size gets totally skipped over & does not seem to be individually available anywhere.

ebay has been my saving grace for getting this sort of hard-to-find metric tooling & have lucky on bargains for well-made quality items usually from industrial sources --- no luck with this M9 chaser

i have had excellent results with the homemade style chaser i had to make for an M12,
i was impressed with how well it worked

https://www.hagerty.com/media/mainte...thread-chaser/

very simple procedure

random pic found online, illustrates the concept well

Thanks for the reply! I was actually just coming in to update this - I found the same thing, took my dremel tool to one of the old flywheel bolts, and that did the trick.
 
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Old Apr 3, 2026 | 06:37 PM
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cheers !

awesome.

always a triumph to overcome disaster in such a way!
 
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