Re: P71 Engine rattle and no oil pressure? Help!
First, do not drive or run the engine with no oil pressure or the engine will become damaged. My guess is that the oil pump quit working. When this happens the oil pressure will drop low or to zero. Oil is no longer getting to the valve train and lifters begin to make lots of rattling noise. It will start with a few clicking and clacking noises and after a minutes or so will turn into an awful loud rattle and loud tapping at the top end of the motor. If you are able, replace the oil pump. If you are not able, have it towed to a service station. DO NOT drive it.