Woodruff key shearing?

[tjsdaname]

what are some reasons the woodruff key would shear off? we are having problems with ours shearing constantly.

 

[Awk08]

you gotta lap the flywheel taper to the crankshaft taper with valve grinding compound.
the tight taper fit, and proper nut torque, is what holds it from slipping, the woodruff key is just a locator for timing

 

[Blaaster]

After lapping, Tension up to 53ft lbs making sure the thick washer is under the nut.

 

[BrandonH]

How do you guys keep the flywheel from turning when tighten that but to spec. I used my impact to get it off

 

[Awk08]

How do you guys keep the flywheel from turning when tighten that but to spec. I used my impact to get it off

the tusk clutch holding tool also has pins to hold the flywheel........
http://cgi.ebay.com/ebaymotors/NEW-...t=Motors_Automotive_Tools&hash=item4170e91bc3

 

[Blaaster]

A back yard way to hold the flywheel is to wrap a ratchet strap around it a few times and secure it somewhere to the frame away from the direction of travel of the wrench.