Tried posting in the tech sectoin but didn't get an answer, I'm doin a timing belt and water pump on a jdm d15 bottom end with a d16z6 cylinder head, i assume i would use the d15 water pump with the block, but i was told i could use either the d16 or the d15 timing belt, where one would be tight(d15) and the other would be a little loose(d16)....