i had a 90 prelude si with a b20aX in it i think it was b20a5, either way, im not sure if they are the same engine, but i broke the t-belt also and it was a bitch, didnt make any crunching noises either, maybe the key on the crank cracked in half on your motor.

either way, im pretty sure its interference and you are probably screwed if you cant fix the head yourself, cause they nail ppl for that. best bet is to buy a used motor for like 700 or a head if possible.