So this is my first post here I am new. I bought my RDX used in October last year with 108k on it. I have noticed that the brake pedal was getting further and further to the floor and there was lots of grinding when coming to a complete stop.

Yesterday I did a full brake replacement with four rotors and four ceramic pads. The pedal is much better now but still seems quite far down. I used a power pump bleeder on all four calipers and bled them in the order somone mentioned on the forum. The front calipers bled very nice and I was able to get the fluid to change to a clear new fluid with about two fluid exchanges via the small container. The passenger rear caliper would not bleed much fluid at all in fact it was mostly air bubbles coming out of the line. Could there be an issue with this caliper and would it cause my pedal to be lower to the floor? I was able to get the piston to move after compressing it via caliber compressor. I also tried to bleed that caliper the old fashioned way and still didn't get much fluid out.

The old rotors were quite bad so I am guessing they were original?

This is the bleeder.

 

You will probably have to rebleed the brakes. If there's air in the lines then the pressure won't hold. Did you put in new brake fluid while you were bleeding the brakes?

 

If there's a bunch of air coming out of the caliper then that's your problem. Keep bleeding that sucker till it flows like the rest.

 

keep bleeding!!!!

i always give up with those stupid self bleeding pressure kits. I end up just grabbing a friend and doing the pump pump pump and HOLD of the brake

 

Well I spent probably close to half an hour on that right rear passenger caliper. I even tried the old fashion way. Could that caliper be bad? I can take the tire off and try to re-bleed again. All of them except this one bled well. Yes, I also made sure to keep topping off the brake fluid in the reservoir. I did notice that the bleeder valve is really high off from the caliper almost like its not the correct valve. All of the other calipers have valves that are flush on the caliper.

 

weird.

are you able to compress the piston on that caliper?

 

Yes I was able to. The bleeder nipple on this caliper is out quite a bit. I could not tighten it down like the others, it seems to just stop only half way down on the treads.