I have seen the question asked a million times on other forums. It usually comes down to someone claiming to be an awesome mechanic stating that hydroboost brake boosters aren't rebuild-able/resealable or that they are so complicated if you took them apart you would never get them back together. :banghead: Well even though my hydroboost has been doing a great job keeping my undercarriage lubricated the constant top offs with power steering fluid and air in the system got pretty annoying.