See if you can find someone local with an old (or new) belt to compare your old belt to.
I can't think of a good reason why a new belt would be longer on a b18c1. If you had a b16a and picked up a b18 belt then yeah, might be a smidge longer (anyone confirm?).
Originally Posted by ChrisGSR
I did do the tensioning procedure, rotating three teeth CCW on the exhaust cam gear before torquing down the tensioner pulley.
Did you bed the belt on the pulleys beforehand by rotating the crank counterclockwise 4-6 times?