I have just cracked the bleeder screws with the pressure bleeder pumped up to about 15 PSI and obtained very good results. No pumping required at all. Jamie Howton 1998 A4 1.8TQ, Tip, APR Chipped, Brilliant Black 1987 Porsche 928 S4 A/T Dunkelblau 80K 1979 Porsche 928 5 Spd Opelmetallic 64K