What are the signs of bad rotors?

Answer

Signs of bad rotors include vibration when the brake petal is depressed, and a visual inspection that reveals wear and tear. Rotors can be replaced or resurfaced unless they are under a certain thickness. A rotor that is too thin does not absorb the immense heat of the braking process and may crack or break while in use, causing brake failure.

According to experts at Tomorrow's Tech, "The bottom line here is this: if a customers vehicle has a pedal pulsation, the rotors need to be resurfaced or replaced. You also need to measure rotor runout on the vehicle to determine if the problem is the rotor or the hub, so the appropriate corrections can be made."

Runout occurs when the rotor wobbles as it spins and can be measured with a dial indicator.

Rotors should be replaced if hard spots or cracks are present but can be resurfaced when they are grooved. Hard spots and cracks indicate inevitable rotor failure and resurfacing is not recommended for these conditions. Grooving occurs naturally during the braking process over a period of time and, assuming that the rotor is of an appropriate thickness, most motorists choose to resurface rotors rather than replace them initially.

Q&A Related to "What are the signs of bad rotors?"
According to the website Automedia, wobbly breaking is a common sign of bad brake rotors. You can feel it almost immediately when you apply the brake; as brake rotors wear, they lose
http://www.ehow.com/list_7616319_signs-bad-rotors....
Visual inspection with outside micrometer. They should not be glazed, pitted, or thinner than the allowable minimum as measured with the micrometer.
http://wiki.answers.com/Q/How_do_you_tell_if_brake...
Sounds like you didn't lubricate the contact points and the slides for the brake pads and caliper and the pads are sticking. You should also sand off or just replace the clips that
http://answers.yahoo.com/question/index?qid=201009...
Car rotors are bad if you hear a grinding noise when you step on th...
http://www.chacha.com/question/how-can-you-see-if-...
Explore this Topic
There are several signs to look out for if you think you have bad rotors. They can include grinding noise when breaking, pulsating brakes, or you can see ridges ...
Bad brake rotors look like they are all worn out. They will be very rusty and not have a good shape to them. They are something that should be replaced when they ...
Common causes of cars shaking over 45 mph can include misalignment of the wheels, bad wheel bearings and warped brake rotors. If your car is shaking at relatively ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com