Zero brakes - SOLVED

[Cellison]

I'm confused, which is a fairly normal trait over here.

After the MC was bled, were the output ports plugged (no lines connected) and, if so, what was the pedal like then?

The pedal with no lines connected is the same as when I connect the brake lines. I can mash the pedal to the floors with little effort without lines connected and with lines connected. From my understanding, the pedal should become hard after 2-4 pumps when it uses all the stored vacuum from the booster. But it’s like it’s never gets firm.

It could be a very simple solution that I’m overlooking because I’m so frustrated with this, I went from locked up brakes to no brakes

 

[wjburken]

The pedal with no lines connected is the same as when I connect the brake lines. I can mash the pedal to the floors with little effort without lines connected and with lines connected. From my understanding, the pedal should become hard after 2-4 pumps when it uses all the stored vacuum from the booster. But it’s like it’s never gets firm.

It could be a very simple solution that I’m overlooking because I’m so frustrated with this, I went from locked up brakes to no brakes

So with the ports on the MC plugged after bench bleeding it and then installing it, leaving the ports plugged, you are getting no resistance in the pedal?

 

[Cellison]

So with the ports on the MC plugged after bench bleeding it and then installing it, leaving the ports plugged, you are getting no resistance in the pedal?

Correct

 

[exp500]

When bench bleeding M/C, move it nose up / nose down when "pumping"a few times to get that last bubble out. It usually floats up in reservoir.

 

[Cellison]

When bench bleeding M/C, move it nose up / nose down when "pumping"a few times to get that last bubble out. It usually floats up in reservoir.

I will try that today, hopefully it’s something as simple as that

 

[exp500]

Just noticed your M/C parts source..... Several years ago (4-5-6) A friend with a small auto shop mentioned that he finally started putting a small auto centerpunch mark on each non functioning new M/C he returned to AZ. Seems they had a problem about the warehouse swapping boxes and sending them back to stores. He caught a few in that way.

 

[Cellison]

Just noticed your M/C parts source..... Several years ago (4-5-6) A friend with a small auto shop mentioned that he finally started putting a small auto centerpunch mark on each non functioning new M/C he returned to AZ. Seems they had a problem about the warehouse swapping boxes and sending them back to stores. He caught a few in that way.

Got a 3rd MC and all is good now. Who would have thought I could get 2 bad ones. So incredibly irritating.

 

[Marky Dissod]

Who'd've thought I could get 2 bad master cylinders?

Who'd've thought so many L87 6.2L V8s would be failing so soon?

 

[Fless]

Got a 3rd MC and all is good now. Who would have thought I could get 2 bad ones. So incredibly irritating.

Thanks for coming back and confirming the fix!

 

[Cellison]

No problem! These master cylinders gave me a run for my sanity that’s for sure!