While David is correct, the air bleed kit is mostly helpful when doing coolant flushes or when replacing other parts of the cooling system. This is the reason that I would get (and have) one. Use it once for a waterpump replacement and it is worth its weight in gold. Andy Soma576@xxxx 1982 DeLorean DMC-12 VIN#11596 Fargo, ND 58102 [Non-text portions of this message have been removed]