1989 Toyota 4WD pickup 22re 135k
So i removed the belts and pulleys from the front of the engine to try and find the oil leak. I let it sit over night and looking at it this morning it looks like oil is leaking from directly behind the crank pulley, and not the timing chain cover...phew! Oil pan has a very small leak also but its not dripping, so im gonna leave that alone for right now.
Whats the best way to remove the crank pulley bolt, and is this bolt reusable?

Ive heard 2 different things about installing a new oil seal on the crank.
1. That it may be neccessary to install a sleeve on the crank and then install an oil seal.
2. The orignal oil seal number had been upgraded to better oil seal, anyone know this part number?

Which option would be the best for me? Thanks for you help <img src="/forums/images/graemlins/kewl.gif" alt="" />