Yes there is a need for lubrication for the pump. The bolt that is seeping oil is the feed for the pump.So why is there inlet on the pump for oil? The bolt far back in the head had oil seep out of the tapped hole in the head. Is there any need for oil in the pump at all for lubrication purposes?
Did you ever find a solution to your problem? The front brakes are locking up on my 9-5 Aero.
Well I just talked to a guy on the phone who said he went through all of this and said he replaced the master cylinder as well as the booster, and that didn'vacuummake a difference. He said when he replaced the vacuum pump, the problem was taken care of. Hopefully that's what it is. If not, ill do the booster.