Skip the auto shop - Our mechanics make house calls

Q: Brake piston seized after brake pad change

asked by on

I recently attempted to change my brake pads. After i removed the caliper, I forgot that i needed a clamp to compress the piston, so i put the car back the way it was with the old pads and tried to drive off to get a clamp. The brake has a horrible grind now and the brake seems semi-engaged. I could not leave my driveway. I took it apart again, bled the brake a pit, it became slightly looser, but still too engaged to drive anywhere. How can i at least return it to the way it was?
My car has an automatic transmission.

A: Was this the rear brakes? Many times the re...

Was this the rear brakes? Many times the rear calipers have to be turned in with a special press that turns the piston and presses the piston in at the same time. This is because the parking brake is built into the rear caliper. Often times the parking brake in the caliper gets seized up and causes the brakes to get stuck on. Unfortunately, the only way to fix this problem is to replace the caliper.

Now, if it's the front brakes, it is possible that the sliders on the brake caliper bracket may be stuck. If they get stuck, this will cause the brakes to be stuck on. It is possible for the sliders to be taken apart and lubricated to avoid replacing the caliper.

I would recommend asking for help from one of the mechanics at YourMechanic to come to your location, run a diagnostic inspection on your brake system, and get your brakes working properly again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: When putting foot on accelerator, brake, or shifter, car dies

A few different faults can cause the vehicle to go into a limp mode. The ECU puts the car into this mode to prevent damage and will be associated with a Check Engine Light. The most likely causes are a...

Q: Cant release rear brake piston so that caliper goes back on

If your vehicle has rear calipers that have the parking brake cable attached to them then you need to use a caliper tool that presses the piston in and turns them at the same time. They will need to be...

Q: Oil burning

Hello. Oil can only get in to the cylinder one of two ways. Oil can get past the piston rings from worn or seized rings on the pistons. There is even a possibility of broken rings. The other way oil...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.