Let me preface my response by stating that I’ve never owned a vehicle with hydrovac brakes. That being said, I have had good luck in the past with stubborn air pockets by gravity bleeding. Top off the MC with fluid and leave the top off. Open all bleeder valves and watch for fluid to start a regular drip. Let drip for awhile keeping the fluid topped off. As fluid begins a regular drip at the farthest point close that bleeder. Work your way farthest to closest closing the bleeder after it starts a good healthy drip. Do not let the MC run dry. Might work.ðŸ›
