i'm about to rebuild my b18c and i was wondering do i need to bore it out
or can i just hone it and put in new pistons btw it has 118,000

 

if you can see the factory hone marks in the cyl walls just hone it with new rings and rod bearings.

 

what do the factory hone marks look like?

 

don't depend so much on the crosshatch lines created by the honing stones as they will always be no matter how many miles the engine has, you can just have the cyls. deglazed and reused the old pistons if the piston to cyl. wall clearence is still within spec(s) or there is no damage to the cyls./pistons. a better way is to just have the cyls. honed oversize w/oversized pistons, cause the cyl. wall(s) become tapered and out of round overtime