Unless the balancer is keyed to the crankshaft in some way, the tension of the fan belt and the load of driving the charging system and the water pump will eventually unscrew a center bolt.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!