sooo i went to do my timing belt/water pump last nite on my b18c1 and when i took my crank pulley off i realized it has a nice big crack all along the inside of the pulley, so now i need a new one, honda wants $350+ for one and it will take a while to get here, so i was wondering if i could use the crank pulley from a b18a1 i have lying around? i just wanna make sure there balanced simalarly.....

 

i want to say they are the same even though they have slightly different oe part#. i know for a fact that aftermarket companies (ati, fluidamper) use the same pulley for all b-series engine s

also, you can get an oem pulley online for about $165 plus shipping.
13810-P72-013 is the GSR part#

 

i know when i swaped a b18b into my da i had to swap pulleys from the b18a but this might have been beacuse of the difference in obd0 and obd1. im not sure