Why is my rear caliper piston not compressing?
While it works the needle nose method is a huge PITA due to how hard you need to push in on the piston to make it retract. I had to use pliers on one of my calipers as it had worn all the way through the pad on one side and the piston was out so far that the tool wouldn’t fit in until the piston had been compressed a little bit.
Can You Beat on your caliper pistons with a hammer?
Please don’t beat on your caliper pistons with hammers! I design and test these brake systems. They are robust, but not against hammer blows!! There is an internal spring that must be compressed before it will back off. Some cars have light enough springs that you can do it by hand (needle-nose).
Why do I have to rotate the caliper piston on my Mazda 3?
Think of the brake adjusters for drum brakes. When the car is reversed and the brakes pressed, the adjusters activate to set the shoes. Same principle for these, and it isn’t just Mazda vehicles with caliper piston that has to be rotated to push the piston inward.
Is there a way to compress a Mazda3 piston?
There is an internal spring that must be compressed before it will back off. Some cars have light enough springs that you can do it by hand (needle-nose). But the Mazda3 springs is pretty stout….I couldn’t do it by hand either.
While it works the needle nose method is a huge PITA due to how hard you need to push in on the piston to make it retract. I had to use pliers on one of my calipers as it had worn all the way through the pad on one side and the piston was out so far that the tool wouldn’t fit in until the piston had been compressed a little bit.
Please don’t beat on your caliper pistons with hammers! I design and test these brake systems. They are robust, but not against hammer blows!! There is an internal spring that must be compressed before it will back off. Some cars have light enough springs that you can do it by hand (needle-nose).
Why did the piston come out of my Cynlinder?
All that happened was the piston was over extended because the drum was not on. You should be able to reassemble using the parts you have. If the piston did’nt come out all the way,you might not have taken in air.You have to put the drums on anyway to bleed it,so why not top off the resevoir and check for spongy pedal?
There is an internal spring that must be compressed before it will back off. Some cars have light enough springs that you can do it by hand (needle-nose). But the Mazda3 springs is pretty stout….I couldn’t do it by hand either.
Why are the rubber boots on my caliper not working?
The caliper bolts comprise of slides on them that require being lubed. The shielding rubber boots present on them helps to keep the lubrication in. But, sometimes these boots get tear away by the hasty mechanics when they are mounting new brake pads. As a result, the caliper piston fails to compress. SEE MORE:
Why do the rear brake adjusters not compress?
Click to expand… Because the rears have to set the shoes for the parking brake mechanism. Think of the brake adjusters for drum brakes. When the car is reversed and the brakes pressed, the adjusters activate to set the shoes.