i Have a 89 frod probe gt turbo and when i got the oil changed last the techs said that i have a rear main seal leak and they didnt tell me any thing else i was wondering if any body had any clue on how to fix or if the could help me out on how to lokate and fix it my self

There is also some thing i noticed on the to of the engine everynow and then its hard to say but it sits in a little pocket next to the air intake and its right next to i think is a senser