Ill keep it short! I did the back brakes rotor and pad replacement.i rented the brake caliper tool to turn in both caliper pistons put all my new hardware on buttoned it all up and when I went to push the brake pedal it went to he floor. Is there an adjustment? Or do I need to have them bleed? Thanks
Brake adjustment?
- Thread starter reaper76
- Start date
I did not!
nelliott500
Well-Known LVC Member
You don't need to do it with the car off. You just need to pump the brakes a few times after you do a brake job to build up pressure in the lines again. When you push the pistons in, you're pushing fluid back into the reservoir.
I tried both and the pedal just won't stay up. There is no fluid leaking from anywhere so I gotta think bleeding them will take care omit. I just can't for the life of me figure out why. I've done them before on my other Ls and didn't have Any issues?
nelliott500
Well-Known LVC Member
You must have done something wrong. You don't need to bleed the brakes just because you changed the rotors and pads. Did you disconnect the brake line from the calipers?
nelliott500
Well-Known LVC Member
Still wouldn't cause an issue unless the piston seal actually got destroyed in the process. Unless the pads were down to metal and eating into the rotor, that's not the issue.
Bleeding is definitely the next best thing to try but there's absolutely no reason for it to be necessary.
Bleeding is definitely the next best thing to try but there's absolutely no reason for it to be necessary.
SteveSC
Well-Known LVC Member
You took off the piston? If you did that there will be a whole bunch of air in the system!
nelliott500
Well-Known LVC Member
I was wondering the same thing but I just assumed when he said "took it off", he meant the caliper.
I didn't take the piston out on purpose but it did seem extended as I said when I removed the caliper.
nelliott500
Well-Known LVC Member
So did you actually remove the piston or not? All you have to do is unscrew it all the way and it will come out. Even if the pads were worn down to metal, it wouldn't have pushed the piston out far enough to pop out of the caliper.
SteveSC
Well-Known LVC Member
How badly were the pads worn? Did the backing plate make contact with the disc? If it did then it is possible the piston fell out of the caliper. If that happenned you will have to bleed the entire brake system for air. Have you cheked the brake fluid level?
If you bleed the system (make sure you bleed all the calipers and do it in some order (usually furthest from the master cylinder to the closest)) and you still have issues, check for fluid leaks and if none are found you most likely have a bad master cylinder. Check for leaks where the master cylinder meets the power booster. It is possible to have an internal leak in the master cylinder. The fluid will pass the o-ring inside the cylinder but will not leak outside of the master cylinder.
If you bleed the system (make sure you bleed all the calipers and do it in some order (usually furthest from the master cylinder to the closest)) and you still have issues, check for fluid leaks and if none are found you most likely have a bad master cylinder. Check for leaks where the master cylinder meets the power booster. It is possible to have an internal leak in the master cylinder. The fluid will pass the o-ring inside the cylinder but will not leak outside of the master cylinder.
SteveSC
Well-Known LVC Member
Brake fluid should be changed every two to three years so if you haven't changed it recently it would probably be a good idea to bleed the brakes to change the fluid anyway.
By the way, the first thing you do after any brake work is to pump the pedal. If you have done anything to the brakes you will have moved the pad away from the disc. To make sure you have brakes you also pump the pedal to ensure you will be able to stop when you drive the car.
By the way, the first thing you do after any brake work is to pump the pedal. If you have done anything to the brakes you will have moved the pad away from the disc. To make sure you have brakes you also pump the pedal to ensure you will be able to stop when you drive the car.
The caliper bracket had a froze up pin causing the rear pad to disintegrate. As I said the piston was close to be pushed all the way out. That said I barely touched it to turn it in and it felt pretty loose but no fluid came out so I thought it to be ok. I had no issues before this so it looks like a bleed will take care of my issues.
Bleed my brakes and got my pedal back.But of course that wasn't the end of it. After that my back drivers side rotor was getting hot a smoking. So i took the wheel of again screwed the piston back down scuffed the glaze off of my new pads and resembled. So far so good but I have a new caliper in the car ready to put on just in case.