Because the brake shop used an air impact wrench to install the wheels. Incorrect or mismatched torque on the wheel lug nuts will warp the stock flimsy rotors. Either, have the shop manually torque the wheels and/or install higher quality rotors. Once the damage is done you can't undo it without machining the rotors or replacing them. Machining flimsy rotors just makes them easier to warp next time Are you sure that your pulsation is coming the front brake rotors.Test drive your vehicle in large parking lot where there are no cars or very few cars.Do not exceed 10 mph.Gently engage the parking brake without applying the brake pedal.If you feel a pulsation,your problem is in the rear.Machine or replace the brake drums/rotors and shoes/pads.If the pulsation can be felt in the steering wheel,remove wheels,remove calipers and brake rotors.Check for rust on the wheel hub(this is the area directly behind rotor where wheel studs are located).If rust exist remove with wire brush.Next check guide pins.These should move with minimal effort using your hand.If there is no problem with rust or frozen guide pins,measure rotors,machine or replace if not within specs. and replace pads.If you are using a air operated impact wrench use a toque stick with least amount toqure.The next step is very important USE A TORQUE WRENCH.You can borreow one from most major part store chain such AutoZone and O'Reilly.Please me know if this solves your problem.
The front rotors are out of round or warped, Need to have the rotors turned.
Rotors out of round and need to be replaced or resurfaced?
Do you have anti lock brakes that might be it if not your rotors maybe warped
Warped rotors. Driving using the left foot to brake causes the rotors to heat up. Quenching the hot rotors by driving thru water will cause them to warp. The warped rotors cause the pedal to pulsate.
If you're changing the brake pads and there is too little rotor thikness to turn it, it should be replaced. If the rotor is warped and is too thin to be able to turn to remove the warping, replace it. If the brakes "pulsate" when you use moderate brake pressure, the rotor is warped.
For the brakes, check for warped rotors. For the turning, check for worn CV joints.
The rotors are out of round, WARPED. Need to have them turned and replace pads too.
You have warped the brake rotors. Driving fast & hard stopping or riding the brake will cause this when the rotor is hot and you are stopped with heavy pressure on the brake pedal. Replace rotors and pads.
how to replace break pads on 2001 4runner
If it is a Toyota, they do not know how to fix the squeaking brakes either. Even after replacing all the pads and machining the rotors and rear drums
after changing rotors
If you mean that the brakes "pulsate" when you apply light to moderate pressure... that's caused by a warped rotor. If a rotor overheats it will warp causing disk brake "chatter". Sometimes the rotors can be turned to make them "true" again, but often you need to replace the rotors. I generally do both front rotors at the same time so that there is no difference between the left and right brakes.
I think it is because your rotors are worn out. I had the front shudder real bad and the pedal and steering wheel would pulsate when I braked. Then I put on brand new rotors and pads on the front and no more shuddering or pulsating...brakes like a dream now
If you need to replace the pads only, it can cost about $20 and more depending on state and city. If you need to replace rotors or/and calipers, it might cost $400 to $500 on average and more.
When changing the brake rotors on a 1990 Toyota 4runner the vehicle must be safely raised and propped up. The calipers must be loosen and rotors will be able to be removed. The process must be repeated for all four wheels.
if there is uneven wear on the rotors, the new pads will take time to wear into the grooves on the rotors. rotors in poor condition will reduce the efficiency of your brakes, and promote wear of the pads, you will end up changing them more often. Most brake shops can turn rotors back to being smooth and true.
Most of the time, you can get by with just replacing the pads. The rotors generally do not need to be turned if there is no pedal pulsation or vibration. Rotors will need to be replaced if the exceed the minimum thickness which is stamped on the web (area with lug holes).
Answer: Most likely warped rotors. This can be eliminated by either having the current rotors machined or replaced (or both if manufacture recommends it). Visit your local dealer or brake specialist.
Have the front rotors turned on a lathe at a dealership. check brakes and rotors
you have out of round brake rotors, they can be replaced or machined if they are thick enough, the front pads should be replaced or placed on sand paper on a flat suface to remove the glazing so they will seat properly to freshly machined surface
i have 2006 endeavor changing brakes do i have to remove the two screws in the rotor to remove so i can have resurfaced
how do you replace the front rotors on Toyota Land Cruiser
The most common cause of that is the front brake rotors are out of round / warped. Replace rotors are have them turned.