Are these caliper brackets also a direct bolt up to a 2nd Gen hub?
That's the brake booster doing its job. When you pump it you're running out of vacuum in the booster and the brakes get harder to push.Yea the master cylinder is original I believe. I'm going to swap the calipers around and rebleed all four of them first and see if it works. Can someone explain why I have a "hissing" sound by the intake box on the very first pump though? The pedal would slowly get firm after several pumps but then softens and reaches the floor again.
That's the brake booster doing its job. When you pump it you're running out of vacuum in the booster and the brakes get harder to push.
Dont bother swapping the calipers. Put your bleeder hose on the first caliper in the correct bleeding sequence, crack open the bleeder, top off the reservoir and have a beer and wait. With the bleeder facing UP gravity will slowly push all air out. You've still got air in there. Brakes are a PITA.
Repeat on the other 3 in the correct bleeding sequence. This is a gravity bleed and will get all the air out, it just takes a bit of time.
1. Yes that's exactly what I'm saying.Are you saying i don't even pump the pedal? lol.
Also, throughout the bleed process I noticed I hear a little whine sound from the master cylinder when the bleeder valve is open (so when the pedal goes toward the floor). As soon as the bleeder valve is closed, the noise goes away. Is this normal?
Take forever? Not forever, but longer yes. Gravity bleeding uses the fact that the reservoir is higher to let gravity push the fluid through the system.Wouldn't that take forever to be done though since brake fluid comes out AS the pedal is pressed down? What exactly is gravity bleeding? And what do you mean having the bleeder valve facing up? Like it being at the top side of the caliper or unbolt the caliper and have the valve Facing at 12 o clock?