Skip the auto shop - Our mechanics make house calls

Q: Possible causes of brakes that stick

asked by on

Can a brake master cylinder cause brakes to stick? How can I tell if it is the caliper or the master cylinder? Is there anything else that can make them stick?

A: A lot of things can make them stick. Brake ...

A lot of things can make them stick. Brake master cylinders can make them stick. Here is how you can tell if the brake master cylinder is making them stick. Jack the car up and you’ll see if they are sticking.

Pull on the wheels and see if the wheels are sticking. Go to the brake master cylinder, and all you have to do where the brake lines are, is loosen all the lines. Then, if you go down, and the wheels spin freely, that means that master cylinder was sticking because when you open those lines that would take any pressure off the master cylinder.

Now, let’s say that you think caliper is stuck. If the caliper itself is stuck, all that you’ve got to do is go to the caliper. They have the bleeder valves. You open the bleeder valve and there--if the master cylinder made them stick when you opened the bleeder valve that would make the wheel free out. But, if you opened the bleeder valve and the wheel was still stuck that means that caliper was sticking.

Also, the brake lines themselves can make them stick if the end is mostly made of it metal and those can collapse. But the end is usually the rubber line so you can turn the wheel unflexed. If those collapse, they can make them stick. In that case, it would be a deal where you look at the rubber line of it and start free again. Then you’d know if the line collapsed and needs replacing.

These procedures can be tough, so if you need help with this, have a professional technician, such as one from YourMechanic, inspect your braking issue and determine what repairs are needed.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Is it OK to drive with one cylinder at 70 psi?

Unfortunately, there is no definite way to tell how much longer your engine will last. Generally, a cylinder needs at least a minimum of 100 psi in order to run. In your case, this is not happening, which means the...

Q: had to replace rear brake caliper, is parking brake cable just worn out? Cant get it back on caliper!

You should install the brake cable before installing the brake caliper. You may have to turn in the caliper again to get it back over the rotor when installing it. If you want to have this done for you, a...

Q: Brakes spongy after booster and master cylinder replacement

Hello. You need to double check the installation since you may have put the brake booster rod on the brake pedal wrong causing binding of the brake switch and causing the system to not bleed correctly. Also make sure the...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...