Posted by John Smith8N on November 06, 2012 at 20:11:53 from (188.8.131.52):
In Reply to: Crankshaft Pulley posted by John Schmincke on November 04, 2012 at 17:14:03:
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I've got one of those handy dandy installation tools, but if the bore in the replacement pulley is actually .003" smaller than the crank snout like they're sayin', it ain't gonna pull it on there. It would go on half way and gall up, or it would crack the pulley snout. That's too much of a press fit.
One big difference in the small block Chevy balancer old Boxwrench is installing and the N tractor pulley is the keyway. The small block Chevy balancer can start on the key before you start pulling it on. The N tractor pulley just has a little slot right at the end of the pulley snout and a short key inside at the timing gear. If you can eyeball that key, then pull that tight fitting pulley all the way on the crank and have it drop dead nutz onto the key when it gets there, you're dayum good. Especially with the timing cover on so you can't see how it's going. You'd have to be magical. No backyard Bob is gonna pull that off, and very few pros, either.
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