I have finally tracked down my mystery oil leak. Oil is leaking out from where the vacuum pump meets the alternator.

There is a small O ring that sits between the two surfaces and it needs to be replaced. I have tried using a imperial o ring that is close to the same size and it didn't work. I then tried silicon and it didn't work. Now I'm desperate and will have to go to Mitsubishi to get the correct part. This is my last resort! I get nothing but greef when I go to the dealership looking for these types of small things. They don't make any money of JDM stuff so I understand.

Here is my problem... What part do I order? Is there a part number for just the "o" ring? (preferably a north American part number) Is there re-build kit? Does a ranger or D50 have a similar vacuum pump for reference? Any ideas or help would be most appreciated.

If this doesn't work I'm going to go nuts and install a hydro master cylinder from an minivan to cover my braking duties and use a ARB air locker pump to do my other vacuum duties. Anyone knows me knows I can't handle that level of customization and will eventually go insane so any parts numbers or suggestions of where to find parts numbers would be great!

Thanks for any help or hints... or for donating (or selling) an unused, un-leaking alternator/vacuum pump combo.

Maurie