Q: Brake Pulsation

asked by on

Since about 40,000 miles ago, my brakes have been pulsating in the car. Because of this, I've replaced the rear rotors and pads but it didn't help. Whenever I come to a stop, the pulsation rate slows down as the car's wheels slow. In short, the pulsation is dependent on front wheel speed.

Today, I replaced both the front rotors and pads. Upon spinning the rotor freely by hand with the caliper installed, to my surprise, I hear the pulsation. On one side of the rotor, I hear the scraping of pad to rotor contact, once the rotor turns 180 degrees, the pad isn't touching the rotor and it spins freely. So it sounds like shhh-silence-shhh-silence-shhh-silence, etc. I have cleaned the wheel hubs very well before installing the rotor and they don't have any hints of rust. They're still shiny. If I look at the rotor while its spinning, I can see the outer edge moving a little bit as it turns but only very slightly.

My car has 244600 miles.

You may have a bent rotor hub. This can be checked with a dial indicator gage and if hub is bent more than 10 thousands of an inch it will cause the rotor to move back and forth and cause pulsation.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Brake Pulsation

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: My front end is making a popping noise

This is a common sign of a failing CV joint. A CV (Constant Velocity) joint is a shaft that connects the transmission to the wheels, essentially transferring the power from the drive train directly to the wheels. The CV joint...

Q: Q: Timing belt ripped and after that a weird loud sound

I don't think there was any damage done to your car. Belts break all the time, just put a new one on and it'll be fine. Your steering wheel became hard to turn because your power steering pump wasn't working....

Q: Q: The car is overheating

The normal opening temperature of the thermostat is between 85c and 102c. Your car is running in the middle and this is good. You should not be overheating as this is the normal operating range for your engine. If...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...