Quote:
Originally Posted by OrbitalEllipses
When queried about this in the early 2000s, SOA stated that the pulley was NOT a harmonic dampener. So people should stop talking about balance.
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Wrong... A pulley can still be unbalanced without the shape of the material being the cause. Think of the reason you get a wheel balanced when you change tyres - it's to make sure the whole wheel is balanced around the central axis. A poorly balanced wheel can shudder and vibrate while driving, it can also reduce the life of things like wheel bearings and suspension bushes as a result... However, due to the relatively small inertia of the pulley compared to the crank, and the fact that the pulley is probably not far out of balance in the first place, it shouldn't matter.
As for the adding oil to the thread of the crank bolt, also a bad idea.. Adding oil modifies the friction of the threads, meaning you overtorque the bolt (as with the oil you have to tighten the bolt more until the same torque registers on the torque wrench). You should not add oil unless it was stated in the install instructions.
Finally, in general, when a bolt is told to be torqued to a certain torque spec, and then turned through another angle, it is generally not good to reuse that bolt. The extra turn usually causes the bolt to undergo plastic deformation - ie. the bolt stretches (as with head studs/bolts), which has usually been done when the pulley was first installed from factory. This will probably not matter either.. I'm sure Perrin would have done their research when they came up with the instructions.