Hey i have a vs ute ecotec and it was running fine then it was making a knocking sound and when it done this my ute started to leak oil at a fast rate then i tryed to see what it was and jacked it up and started my ute and it ws knocking the while running made a bang and then the motor just stop like something had jame and the motor . now i try to start it ,it wont turn over it just knocks in the block like its jammed so i got my strong bar rachet and put it on the harmocet balancer and turn it and i can only turn it so far befoe it just stops and wont turn no more what is wrong with my car