I HAVE A '02 L48 THAT KEEPS LOSING AN ENGINE OIL PLUG THAT LEAVES ME WITHOUT OIL PRESSURE. THE DEALER TELLS ME THAT THIS PLUG ( I THINK HE CALLED IT A "FLINCH PLUG" ) IS USED TO SEAL THE PREDRILLED PORT HOLES THAT SUPPLY THE OIL TO THE FILTER, PRESSURE GAUGE,etc. THIS PLUG IS SAID TO RESEMBLE...