what size of socket or wrench do you need to take it off and how would you take off it you do not have a pulley puller. is it possible to do this without bending the rod or the pulley.

 

Need to know what pulley and what kind of vehicle your working on.

 

i am working on a beetle type 1 and it is the bottom pulley

 

I don't remember the mm size of the crankshaft bolt, holding
the pulley on. But the bolt has to be removed, it's a very short
fat bolt. After the bolt is removed , you use a special puller for
the pulley. it goes into the bolt hole in the crank and hooks on
the pulley in two slots, The pulley is very easy to destroy, and
has no reason to be removed unless you are replacing the pulley
or rebuilding the engine. The engine does not have a seal for that
pulley, but has what was kown as a oil slinger. It looks like threads on a bolt and as the engine turns the grooves are threaded
backward in order to push the oil back into the engine. However
if you run the engine hard some oil will bypass the slinger and
look like a leak around the pulley and exhaust.