My right rear disc break was squealing. Break pad was worn. Left side was OK but I changed R&L rear break pads. Also had the rotors machined. I put the high temp lubricants on as the manual suggests. My problem is after assembling my rear brakes, they drag and don't release. I think the calipers need to be rebuilt or replaced, but wanted to run it by someone with more knowledge than I have about this problem.
Re: Rear disc brakes drag after installing new pads
Just did my rear brakes this weekend, Monday had a very slight drag. Noted that when I installed new pads I had to tap them on. That shouldn't be. When brakes are released, there should be enough play to allow the pads to back off the disc. Tonight, I removed the pads and filed down the ends of the tips that go into the top and bottom channels until I could install and remove them with fingertips, that gives them enough play to grab and release. Drag disappeared; the old girl ran like she should.
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Re: Rear disc brakes drag after installing new pads
Did you Compress the Cylinders in as far as they would go when Replacing the Pads.? If not, Depress the Caliper Cylinders Back into the Caliper and install back Loose. Then Bleed the System. When you get in and Press the Brake Pedal a Few times it will set these to where they need to be.
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Squealing from brakes when applied (and sometimes even when not) is a common issue with many vehicles. There are a number of reasons for it, most often it is the brake shoes/pads themselves. Most manufacturers today install ceramic brake pads as OEM parts, but due to their cost, most drivers opt for semi-metallic pads when replacing them. Most manufacturers recommend anti-squeal shims and/or compound be applied to brake pads for disc systems, but they are often ignored and not installed. Older, sticky calipers can also cause poor release of brake pads, resulting in drag and noise. Lastly, worn, warped, and thin rotors can add to noise issues. Having well serviced, quality brake parts and using proper installation techniques will usually remedy brake noise issues. Just as a side note, residual dirt and grease from the installation itself can cause noisy brakes for a few days/weeks after first install until it is worn off and the pads break in. If you have issue beyond the first two weeks, and you have had them installed professionally, take it back and have them verify that the pads were installed properly.
The brake lining's have worn away, the squealing was metal to metal (worn pad against metal disc) The worn pad will have damaged the brake disc. Very dangerous. You will now have to have new brake pads and discs fitted to BOTH front wheels to put it right. Good luck
Before servicing the vehicle, refer to the precautions in the beginning of this section.
Remove or disconnect the following:
Clip, 2 caliper pins, the anti-rattle spring then remove the 2 brake pads and the 4 anti-squeal shims
CAUTION Only replace brake pads on 1 side of the vehicle at a time. Failure to use this procedure could cause the caliper pistons on the opposite side of the vehicle to pop out requiring the reconditioning or replacement of the brake caliper.
Remove a small amount of brake fluid from the master cylinder.
Install a used brake pad into the caliper and compress the caliper pistons.
Apply disc brake grease to both sides of the inner anti-squeal shims.
Install or connect the following:
Anti-squeal shims to the new brake pads NOTE: When replacing worn pads, the anti-squeal shims must be replaced together with the pads.
2 brake pads
Anti-rattle spring and the 2 caliper pins
Depress the brake pedal several times to seat the brake pads.
Check the brake fluid level and top off as needed.
You, Probably will, Brake Squeal is NOT a new problem.
Disc brake's have been Squealing since, They, became
factory installed on chevrolet in 1971. Before, that they,
were a option. In 72 they even had a bulleton how, to
FIX it. And, no it didn't work.
With That said, Any time you replace Brake pads you,
should always re-surface the Rotors.
Why? First you may start to notice a pulsation as the
pads ware (sometimes! ) The best way to avoid, brake
squeal is to manchine the Rotors put, the blue membrain
sealent on the back side of the pads. And hope that works!!
Some brakes Pads squeal JUST SQUEAL??
You, Could do the same Brake job the same as you did
this one and, they may NOT Squeal.WHY, I WISH I NEW. They
sell all types of STUFF to stop Brake noice DON'T waste your $$.
did you turn the break setting all the way in when you installed new pads.if you didnt adjust the breaks then your breaks are pushing to far out and not returning properly.adjust the pads with the adjustment usually accesible threw rear side of drums
It sounds like the rear calipers are bad. Raise the rear wheels and see if you can turn the tires. If you can't, open the bleeder. If you still can't replace the caliper. If you can turn the wheel after you open the bleeder, replace the brake hose to that wheel.
Did you use copper-based brake grease on the brake pins and the back of the pads?
Did you clean all the old gunk off the brake pins and after doing so, where they deeply grooved? If so, you must replace them.
Wrong brake pads. Some pad manufacturers list a patricular pad as being OK for a vehicle. They fit OK but the pad characteristics are wrong and they squeal like crazy or wear out in no time or give lousy raking performance etc.
If the pads you removed had anti-squeal shims on the back of them did the new ones? They almost certainly should have. IIRC, they are held to the pads by some double-sided adhesive tape.
If you get squeak-silence-squeak-silence... at low speed (i.e. just before coming to a halt) then the disk(s) is/are distorted. They will have to be replaced. You must not machine the discs on these brakes - there is no thickness available to do that. If you do tthey may well collapse under the heavy braking of an emergency stop with very unfortunate consequences!
As someone said, the disc may be badly worn and/or grooved -check and replace if necessary.
You may have a stone or piece of grit stuck between a pad and a disc. If so & it's worn a groove in the disc,you will need to replace both disc and pad.
Make sure you torqued any brake bolts correctly and that you put thread sealant on them. Failure to do so can lead to them loosening in normal use. The brakes may squeak for a while if this happens but then things can get much worse...
that sounds like the pressure regulator of your brakes is broken. The pressure does not release from the left side.
Unless it is the calliper, but i think you already checked that out. Pressure regulator is the main cause for problems like this.
It regulates pressure between back and front side