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Messages - Oily Al

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As a postscript to this subject, thanks to members advice and replies I have a hopefully happy result regarding the crank.
I bought a 9/16 L/H cycle thread die from RDG tools (Excellent service) and mercifully, the knackered thread cleaned up very nicely.
What staggered me though, was the amount of sludge in the crank. I think that the threaded plug had defeated previous owners from removing it due to very heavy-handed peening, so as you see in the photo, I'm glad that I persevered.
Many thanks again.

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Twins / Re: Crankshaft. Oil pump drive pinion L/H thread.
« on: 26 August, 2017, 02:42:44 »
Dear All, many thanks for the swift replies on this thread. I'll check the damaged end of the crank on the lathe for trueness first and then see if I can get the appropriate die/thread file. Thanks,Julian S, for the technical information. What surprised me was how soft the metal is at that point on the shaft. Fingers crossed for a successful recovery job!

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Twins / Crankshaft. Oil pump drive pinion L/H thread.
« on: 24 August, 2017, 23:05:23 »
Dear Enthusiasts, Could anyone help me with a problem I currently have with a badly butchered L/H thread on the timing side of
my A65 Thunderbolt 1971 OIF basket case restoration? The end of the shaft seems to  been repeatedly struck and has belled out, to the point where the lockwasher slot has split. I would like to know what the description of this thread is and wonder if it is possible to get hold of a die to clean it up. Hopefully it is repairable, but if not, has anyone got a good late OIF crankshaft within tolerances? I have an excellent late Lightning crankcase if anyone is interested, too. Many thanks.     

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