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Ramp Rat 09-09-2010 16:00:23 70.41.0.39 Report to Moderator	Thanks Guys, That's why I asked about grinding a crank to .040". Not only the strength of the crankshaft but how far into the metal was the nitrite? I'm an aircraft mechanic and when we have a crankshaft turned, if it's even allowed for a given engine, the shop has to re-nitrite the surfaces along with other tests. Same problem with refacing valve lifters. You can remove the hard face real easy. Thanks for all the info. The engine will be my next worry. Right now I'm waiting for a pilot bushing to be made from back east. Seems my NAA doesn't have the common bearing but a bushing. :-( [Reply]   [No Email]
Robert Major 09-09-2010 22:36:21 216.55.222.83 Report to Moderator	Re: Main Bearing Size ???? in reply to Ramp Rat, 09-09-2010 16:00:23   I have talked with a couple of guys that wrench on planes. yeah they are pretty strict on the procedure for what you can and cant do. But guess they have to be as I would not want some piece of junk plane falling on my head when it went south.The other thing is that if it stops you cant pull over and lift the hood take a look then phone the tow truck. some of this stuff and rules would drive me crazy. Im glad you have more patience than me. I have got to put 90 needle rollers in a planetery hub tomorrow "probably nearer 190 by the time they fall out and i get it right!". maybe you should come do that for me?. Regards Robert [Reply]  [No Email]