hi i have this convo running under a diff thread so though i better repost. i have a 51 plate astra g 1.8 sri (z18xe) and i ran out of oil the other day. i put sum more in straight away afta i stopped. (only travelled a matter of a few hundered yards afta teh light came on). there is now a very loud ticking/knocking comming from the engine. its realy hard to locate fully but it almost seems like it is comming from the inlet manifold.

anyone got any ideas?? PLEASE HELP