Meta

After swapping out calipers for a full set of powder coated ones from TPS Motorsports (they look GREAT, btw), I'm having trouble getting a hard pedal. Not being picky, it's really not right. Master cylinder ran dry while calipers were off the car so I bench bled the master cylinder after doing a full four corner bleed with speed bleeders, followed by a second full four corner bleed after bench bleed. With little improvement in the pedal at all, I figured it was air in the ABS system so I took it to my mechanic and we did a pressure bleed with his scan tool and BG bleeder. Still poor pedal feel with little improvement, we followed with a manual bleed at the calipers. Still no good. Question is, if by chance I didn't evacuate the air properly on the bench bleed, would the pressure bleed have pushed any remaining air out of the master and into the lines where it should have been bled out in the subsequent multiple bleeds? My mechanic thinks its a bad master cylinder. I'd like to rule out other problems before I pull the trigger and buy a new master. Any thoughts?

Cutlassmaster

I has similar issue so I followed what service manual said. Bought the fittings that fit master cylinder and put line through them and then used hammer and vice to crimp them over twice. I actually disassembled MC and cleaned it first. Then I installed MC in vice and put home made plugs (fittings with line) and started bleeding. Kept tilting MC forward and then back until no air was coming out. At that point I could only push about 1/16 in before it was hard. Then reinstalled and had son push pedal when I reconnected each line to push air out. Worked like a charm. Brakes are solid now.
Chris

BigGun

You didn't by chance install one of the calipers upside down did you? Make sure all the bleeder screws are on the top. I've read on the forum where people have made this mistake.

Meta

No, I definitely did not install just one caliper upside down. I installed TWO calipers upside down. I AM WE TODD DID. I AM SOFA KING WE TODD DID. Read that aloud several times and you'll know how I feel. At least I'm not the first and I feel better that even my mechanic also overlooked what we both know is wrong.

Cutlassmaster

Glad it was a simple mistake and that your brakes should be back to solid once you swap them.
Chris

n8dogg

I've made the same mistake. Funny thing is I was able to get a firm pedal and caught the mistake later on just by looking things over.