i got my hands on a stock turbo from a '94 ps and one from a '98 ps. the one from the '94 has been sitting on a shelf for quite some time and the '98 has been on a non-running van for i dont know how long. is there a way to check a turbo out to see if it's any good? do the obs turbo's go bad? is there a rebuild kit for them? i was told to submerge them in fresh oil so that every single internal part can be lubricated. what to do and what not to do, that is my question. your help will be greatly appreciated. thanks.