hi I just got back from our holiday with the family and I needed to do a oil/filter change on the zd30 03 d22. the car was make a odd nocking sound (witch I think is the tension pully) but not all the time and the oil light didn't come on. I have done the oil/ filter change but cant seem to get the oil to go to the bottom of the engine. i have put 7l of oil and its not showing up on the dipstick.