I have recently purchased a b18b crankshaft for my build and im having troubke with the bearings... Im getting almost a mm difference on journals, and i was wondering if i should take it into a machine shop to get them evened out, or if i should be fine? For example, cylinder 2 and 3 have a .8mm difference

 

Rod journals? Sounds like this crank might be a victim of a spun bearing. Visually they can look polished and fine, but measure a journal that's had a spun bearing and it's going to be smaller like that.

I've never dabbled with doing oversized bearings. Might want to just find a new crank/yell at the person who sold you that...

 

Yeah i just got home and remesured everything, all the rod journals have a difference of .02 and just that one has the .8, im taking it to the machine shop to see if they can fix it lol...