jbooker82 Posted August 6, 2013 Report Share Posted August 6, 2013 (edited) Nut backed off first. A properly torqued flywheel nut doesnt ever require a key. All a key does is locate the fywheel in the proper orentation. The taper of the crank and flywheel along with the nut hold it in place. The key isnt designed to keep the fywheel from spinning on the crank. Any time you swap a flywheel or crank out you should lap the two together. That way the tapers 100% match. All you do is put some valve grinding / lapping compound on the crank and flywheel. Put the flywheel on the crank and spin it back and fourth. Then clean the compound off. Edited August 6, 2013 by jbooker82 Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted August 6, 2013 Report Share Posted August 6, 2013 ^^^^ X2 And a little blue loctite on there before you mount the flywheel works great. I made a tool using an old flywheel puller so I can slowly spin a flywheel on the crank to lap it perfectly using my 28v dewalt drill. Work it till you have a nice matching frosted finish on both the crank and flywheel. Detonation can cause flywheels to spin on the crank and "Take the key for a ride" But I doubt that was an issue on a simple warm-up. Quote Link to comment Share on other sites More sharing options...
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