T35 crankshaft repair

[Andy Smith]

Damaged keyway on the flywheel end of the crank plan to get a new keyway cut can anyone think of anything that would effect the positioning? Andy 

[eddie]

Andy,
       The taper is more important than the keyway! I would suggest that you should leave the keyway as is, lap in the taper, re-fit the flywheel and crankshaft nut and fully tighten it. (If you are concerned about it coming loose again, use a little Loctite, but DON'T back off the nut in order to get a split pin in - that will probably eventually result in a loose flywheel). Personally, I don't even use Loctite on my crankshaft nuts - they just have a smear of Molyslip grease to make sure all the torque applied drives the flywheel onto the taper (rather than trying to drag a dry nut around on the thread).
  Hope this helps,
                         Regards,
                                     Eddie.

[EW-Ron]

With a little sub-note about lubing threads and working to specific torque values.
That "trying to drag a dry nut around on the thread" is what gives the torque value its value. !!

So if you are torquing a crankshaft nut to a known value - say 100 ft/lbs - and you lube the threads,
then, depending on the lube type, the amount of stretch may be reached well before that (dry) number is 
reached on your torque wrench.

So a lubed 50 ft/lbs may be equivalent to a dry 100 ft/lbs.
(Modern) manuals will often quote torque values either as dry values or values oiled.
To emphasize the difference in techniques.
Hopethishelps