This may be a silly question, but I dont know the answer so I will still ask. While helping my son get his first car running(88 Mustang), we've acquired a few used parts that are still good. We have two water pumps, a power steering pump, master cylinder, two starters and a alternator. I know that these pumps have seals and or valves inside. What's the best way to put these up, so as to not damage the internals? I know there's nothing to do for the electrical parts, except just box them up, but for the pumps, should they be completely drained, or leave some fluid inside? I may just try to sale them out, but I would hate for some good components to go bad just sitting up in my shed.