The easiest way to check is by looking at the oil filter housing and oil cap location. And if someone were to have put an M50 into your car, they would have needed to also convert it to OBD1, etc. Trust us, you have an M52. Everything shown in the engine photo indicates an M52.
1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
Last edited by ZeGerman; 06-29-2012 at 01:32 PM.