Im having a hell of a time and need some help. Do all B series engines share the same size crank gear?
I bought a motor (sleeved B18A), which consisted of bare block & crank. The motor has been built and is now fully assembled. HOWEVER, I cannot find a crank gear to fit (the crank) for the life of me. I've tried three different B series crank gears (newer B16 & 18 gears mainly).

Are the B18A crank gears larger than newer B series crank gears? Or, do I potentially have a B20 crank in the B18A bottom.

 

BTW, I did search first.

 

how far off is it?.. i thought most shared the same gear.. the b20 is mainly a b18 just bigger bore.. so i thought they shared the same crank.. could be wrong.. anyways, if its close then i dun no maybe the crank if fucked

 

It's not that far off. However, it just won't go on... I really don't want to take a hammer to it. I may end up using a micrometer to evaluate the size.
Any other suggestions?

 

LS and GS-R and different year do shares a different crank gear. So you just have to find one that fits, I am not sure which one is bigger, just keep trying or mic it.

stan

 

either mic it or call the dealership and have them compare part numbers. Even if the PNs are different it may be the same thing. It has been known to happen.