If they are warped, they need to be turned, if they are groved, they need to be turned. If they are glazed, they need to be turned. In general, if you are working on the brakes, they need to be turned.
If they are too thin (not wide enough across) to be turned, they need to be replaced. Many newer rotors are not thick enough to be turned, so you just replace them every time you replace the brakes. Most auto parts retailers will measure the thickness of the rotors for you and tell you if they can be turned.
you can do a visual check if you can see the pads and rotors or a hearing test while driving the car start coming to a stop if you hear a highpitched squeel you need new pads If there is a grinding sound when you step on the brake , you need pads and possibly rotors (depending on the damage) . To check your brakes you need to remove the tire and inspect the pads and rotor . If there is little or no "meat" left on the pad they need changing . If there is pulsing in the peddle when you depress the brakes the rotors may be warped from heat and need to be cut or replaced . Drum brakes require you to remove the tire and drumm to check the shoes .
Rotors need to be changed when they have been resurfaced too many times or becomed too warped to be turned and leave them thick enough for safety. Brake pads should be replaced every 30-40,000 miles depending on driving habits. When you change the break pads, have the rotors resurfaced at the same time. It only costs about $10.00 each to have them turned at the auto parts shop. Few professionals, if any, will replace pads without turning the rotors.
Brake rotors wear just as brake pads do and when they wear down beyond minimum specs they become unsafe. Good brakes are a # 1 priority.
There really is no set time or even mileage. If good quality brake pads and s hoes are fitted, they will last a long time. Most disc brake pads have 'squealer' plates, these are thin tin plates that screech when your pads need to be replaced. I like to keep a good eye on all essential features of my car, so I take off the wheels and check my pads and shoes at least twice a year.
You will need a 7mm hex key. Everything else is very straightforward.
Yes, If you hit something. Rotors are very essential in stopping, that's what the brake pads are pressed in against to bring your car to a complete stop.
Either warped rotors or drums can cause pulsating. Apply the parking brake slowly while going about 15mph and see if t pulsates. If it does, it is the drums that need turning. If not, it is the rotors that need turning.
When rotors need to be changed usually the pads have worn down. It is always a good idea to change pads when changing rotors.
As long as your rotors are not warped, or you have not let the brake pads wear to the point they defaced the rotors, there is no need to change them. Just install new brake pads. Rotors can last the life of the car.
Replace the pads, and the rotors. You need to change the brake pads and the rotors.
You do not need a torque wrench when replacing brake pads and rotors. Some of the tools needed to change the rotors and pads are the c-clamp, sockets, wrench, grease, and brake cleaner.
worn pads change your brake pads and get your rotors machined while your at it
I went to a local shop today and they charged me $306 just to replace my FRONT brake pads and rotors
Its a good idea to change the pads because the old ones may have worn unevenly. That may cause future damage to the braking system. If you just need to get by then its ok to used the old pads but most of the time the rotors cost more then the brake pads. I WOULD CHANGE THE PADS.
To change the brake rotors on a 1991 Honda Civic raise the vehicle. Remove the wheels and brake caliper bracket. Remove the brake pads. Loosen the rotor mounting screws and replace the rotors.
I don't know if you are saying you have the new hubs and rotors and still have pulsation, or if you are asking what causes pulsation. If you have pulsation on slowing this is due to warped rotors, and you need to change the rotors and the brake pads, not the hubs. Not too expensive: 2 rotors and brake pads for my Pontiac is about 55 bucks. DIY of course.
Check out this post: http://www.mavromatic.com/2007/03/diy-part-i-replacing-rear-rotors-and-brake-pads-on-a-land-rover-discovery-ii/
Check front pads and brake rotors. You might have to change the pads.
You will need to remove the tire and wheel from your 2005 Dodge Durango. Remove the brake pad Springs and calipers. Tap the rotors with a hammer to loosen them. Slide the rotors off. Reverse the process to install the new rotors and brake pads.