It's just one of those things you must check carefully when building an engine, as the crank can be ruined if something goes wrong in the process. regards, Lynn --- piper_pa20 <piper_pa20@xxxxxxxxxxx> wrote: > Bruce's claim that nitriding crankshafts can warp > them is news to me. Mind, > I'm not a machinist but I have hung around light > plane maintenance shops > (FBOs) for way too many hours and I can't remember > that ever being > mentioned. Of course, lots of things were never > mentioned. Anyway there's > a good summary of heat treating processes at this > link: > > http://64.78.42.182/sweethaven/BldgConst/Welding/lessonmain.asp?lesNum=2&modNum=4 > > Joe Fulton > Salinas, CA > > > > > > __________________________________ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com