My vacuum pump is sucking oil from the crankcase and leaking it all over, it also is ruining the diaphrams. I have the plastic piece that sits ontop of the cam shaft(people at the parts place told me this could be the cause, maybe they were just trying to sell me something). Im not sure why it is sucking oil. If i cant fix it can i remove it? I have driven the past 20k miles without power brakes due to all the ruined diaphrams, not having them would not bother me.