Re: Rear main oil seal
Ok, best way to see if it's the rear main, pull the flexplate/tourqe converter inspection plate at the front bottom of the bellhousing. if there is alot of oil on the flexplate, most likely have a rear seal out. If most of the oil is on the outside of that inspection plate, most likely pan or other from top. Your 88 has Fuel Injection, and the intake has 2 parts an Upper (or Plenum) and Lower (like carbed engines) the lower leaks in the back sometimes. Yes I forgot about Valve covers! The covers leak too if thats whats leaking ford has some steel rubber gaskets that never leak.
I agree that you should wash the underside to determin the actual leak area. I also left out the fact I have some New Ford gaskets for the pan, rear seal, valve covers, and possibly the intake set. I'd let em go for alot cheaper than your local Ford store or even cheaper than crap aftermerket gaskets if your interested. I don't need em any more cause My 89 5.8 will not leak any more cause I already have a full set installed. These are the rubber/steal gaskets that I use at work and I have never had one leak.
If your not wrench impared and don't mind doing it all I woul suggest doing all the gaskets I have mentioned cause if it's not leaking now and has not been changed before it will leak in the future. The latest oil leak on my 89 Bronco 5.8 was the timming chain cover, pooched out the gasket at the top probibly from over-revving (6000).
Glad to help, it's fun for me.
Ford guy with twin rockcrawling Samurai's [img]/wwwthreads_images/icons/wink.gif[/img]