So my crank pulley fell off the crank yesterday. I have a SLP UDP and when it fell off it got scratched up and what not but where the belts ride it looks perfect. My question is, will the pulley be off balance? Should I get a new one or will this one be fine?

 

Its fine. its made of steel and spins at speeds upto 6xxx rpm. Throw it on..

Do you have the old bolt?

 

And besides, worst thing that'll happen is, it'll vibrate if it's bad. check up on it daily for a couple days. Should be A-OK, though.

 

Install the used crankshaft balancer bolt.

Tighten the USED crankshaft balancer bolt to 330 N·m (240 lb ft).

Remove the used crankshaft balancer bolt.

Important: The nose of the crankshaft should be recessed 2.40-4.48 mm (0.094-0.176 in) into the balancer bore.

...

Install the NEW crankshaft balancer bolt.

Tighten the NEW crankshaft balancer bolt a first pass to 50 N·m (37 lb ft).

Tighten the crankshaft balancer bolt a final pass to 140 degrees using the J 36660-A .

 

Ok sweet! Well I'll be using a ARP bolt I have. I still have the old bolt to put the pulley on. Thanks a lot for your help man.

 

check your crank for nicks or signs of spinning or warping. Sometimes when the come off they can damage the end of the crank.

 

Yeah it could have spun on the crank also.

 

Post good clear pics. If there is any damage on the inside diameter then no. If the damage on the outside of pulley is severe then no.