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Old 05-16-2011, 04:20 PM   #1
sthomas
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Broken bolt in Diff



Well, after a few months of clunking, the front bolt attaching the diff to the rear subframe has snapped. With a chunk of bolt still threaded into the diff.

Anybody been able to fix this without removing the diff? It looks impossible, but I thought I'd check.
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Old 05-16-2011, 04:25 PM   #2
BigD
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No help to remove it but here's a discussion on fixing the inherent problem:

http://forums.bimmerforums.com/forum....php?t=1016048
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Old 05-16-2011, 05:09 PM   #3
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I've seen rocco do this to a lug nut. I dont know if the same thing would work on a diff bolt, but i dont see why not. Get a drill bit and a torx bit. The drill bit must be a little smaller than the end of the robertson bit. Drill a dimple in the very centre of the snapped diff bolt inside the threaded hole. When you've shaved a few MM, hammer the torx bit into the broken bolt. Get a socket wrench and screw it out.

If this doesn't work, you'll have to drill out the bolt and then thread the hole again. I'd bet if you hit it with some liquid wrench, kroil or 50/50 atf acetone it would come out easier.
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Old 05-16-2011, 10:51 PM   #4
1BADBMR
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Welcome to the club, my bolt snapped about 4x since I owned my car.
Do yourself a favour and replace the rear sub bushing. That helped me.
I think 3 of the 4 times my Diff had to be lowered to remove the bolt
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Old 05-17-2011, 12:26 AM   #5
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costco sells 4-packs of e36 diffs.
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