I've seen all kinda crap stop the oil hole up in the head that machine shops missed. you might try running some mechanic's wire down the oil hole and then spinning the engine over. Might shoot out something. Other than that.....well.....disassembly.
i have runned a wire down the hole all the way in to the cam. so nothing seems to be stuck in the hole. i don´t want it but i think the machineshop installed the bearings wrong.
