Brake Petal goes to the floor, please help!

[Alphabravo]

Hi. I have a 2008 GC with the E-Brake calipers in the back. I changed the brakes and rotors all around and now the petal goes to the floor. I know it has something to do with the rear brakes, because I did the fronts first and after a few pumps I had good petal.

I've done these types of rear brakes before, you use a tool to turn the caliper in. Is there anything I missed? Did I turn it in too much? I don't think it is the master cylinder because it was fine before I started and fine after I did the fronts.

Also, the e-brake doesn't hold at all now, so that's another reason I think the problem is in the rear calipers. Maybe an Adjustment?

Any help would be greatly appreciated, i need this van for work!!

Thank you.

P.S. There's nothing leaking, either.

[AndrewG]

Have you had someone watch the caliper as you step on the pedal to see if they're moving at all? How close are the pads in relation to the rotors?

[Alphabravo]

No, I had nobody to help. They were pads & caliper were pretty far apart, which from what I read in the Dodge Forum, that's my problem. I cranked the pistons all the way in and I wasn't supposed to do that. Too dark to mess with it today, but I'll try backing the pistons off tomorrow and post the results.

In case someone is having the same problem, they said that the piston should only be in far enough so it is tight when you put the caliper back on. Although I've done these types of brakes a few times before on other cars and never had this problem.

Thanks for the reply.

[AndrewG]

Originally Posted by Alphabravo

No, I had nobody to help. They were pads & caliper were pretty far apart, which from what I read in the Dodge Forum, that's my problem. I cranked the pistons all the way in and I wasn't supposed to do that. Too dark to mess with it today, but I'll try backing the pistons off tomorrow and post the results.

In case someone is having the same problem, they said that the piston should only be in far enough so it is tight when you put the caliper back on. Although I've done these types of brakes a few times before on other cars and never had this problem.

Thanks for the reply.

Are they screw in pistons, or did they push straight in with that press looking tool I can't think of the name of? Screw ins (that you usually find on the back): yeah you leave those close. Press ins you can send all the way (as long as you don't mind back flooding your master cylinder and making a mess). When you pump them they come right back out. I'm sure I'm repeating shit you've already read.

[Alphabravo]

They are the screw-in pistons. I know now that I cranked them in too far. I'll back them off tomorrow and post the results. Thanks for the reply.

[Alphabravo]

Problem solved!

I backed off the pistons, it only took about 1/4 turn, if that. I made sure that the calipers went on nice and snug and I had brake pedal and the e-brake works better than it has since I bought it (used).

I was a little concerned that there was a little bit of drag when I turned the wheel, but it seems to be OK. The van coasts fine.

Hope this helps anybody with the same problem. Thanks to AndrewG for the help.