FOR MY 1990 300 SEL BENZ ANYBODY CA HELP ME WHAT IS THE PROBLEM OF THE OIL PRESSURE THAT IF IT'S HOT THE ENGINE THE PRESSURE OF THE OIL GO DOWN TO 0 READING OF THE OIL PRESSURE GAUGE AND YOU WILL HEAR THE NOISE FROM THE TOP OF THE ENGINE. I TRIED TO REV AGAIN SO THAT THE PRESSURE OF THE OIL COMES UP BUT IT'S NOT, SO WHAT I AM DOINY IS I WILL TURNED OFF THE ENGINE AND WAIT FOR 10 OR 25 MINUTES ANG TRIED AGAIN TO START AND THE PRESSURE WILL COMES UP AGAIN. CAN YOU HELP INSTEAD THAT I WILL ASK ANY MECHANIC HERE.