are grooves in rotors bad?
150899
Scoring and grooves in a rotor can impede its capacity to slow the vehicle, as well as cause vibration and pulsation that can be felt in the pedal. Plus, when the pedal no longer interacts with the brake rotor, the ensuing vibration may make it feel like the car will not stop at all.
147925
They perform well, although not necessarily better than other styles of brake rotors. ... Drilled & slotted brake rotors are also are fine for general use in street vehicles. Cons: Drilled & slotted rotors are not recommended for performance racing since the drilling makes them vulnerable to cracking.
1351529
If a wheel bearing goes bad, more friction will be placed on the wheel, and the wheel will start to wobble. There are a few signs to watch out for when your wheel bearing starts to go bad or is missing. ... A bad wheel bearing can lead to uneven tire wear, which means you will have to purchase tires sooner.
579367
It's all about dispersing heat and gasses, when it comes to these drilled and slotted rotors. The cross drills help the rotor and pad cool off, while the slots are primarily focused on pad health. This is not necessary for daily driving because when you slam on your brakes, its usually once and hard.
61378
This will cause brake noise or brake squeal and cause the pads to overheat the brake rotor. Pads must slide freely on these pieces of hardware without jamming. ... Brake rattle can also be caused by a loose disc which would mean a loose wheel and of course this is a serious issue which needs fixing immediately.
808360
Cross Drilled Brake Rotors These days, while they still look great and perform well, the drill holes are more for aesthetic reasons than anything else. For performance driving, slotted rotors have become the preferred choice because cross drilled rotors are more prone to stress cracking under extreme use.
941979
Shaft currents induced by VFDs can lead to motor failures. Without some form of mitigation, shaft currents travel to ground through bearings, causing pitting, fusion craters, fluting, excessive bearing noise, eventual bearing failure, and subsequent motor failure. This is not a small problem.
180864
This has several negative effects. The rotors are probably warped, the pads are fried, the brake fluid is now burnt (yes brake fluid can get toasted, and it does cause negative effects,) the boot in the caliper will probably start leaking, and this much heat can even damage the rear wheel bearings.
1216660
First, the brake pads are attached to what are essentially metal clamps -- which will begin grinding against the rotor. This can cause the rotor to warp or break. Second, the lack of brake pads means the heat from the friction won't disperse correctly, which could cause the whole braking system to overheat and fail.
492788
You don't have to resurface the rotors to run a different pad. Also, it's not recommended to resurface a slotted or crossdrilled rotor. If they were blanks (even 2-piece), you can turn them. Most track pads at low temp do a pretty good job of grinding off any old transfer layers.
1147895
Typically you want to have your rotors turned every other brake change. This ensures that they remain free of debris and do not warp. Regular brake wear and hot spots can often cause your rotors to become warped and having them turned will ensure that they last as long as possible before having to be replaced.
227768
When you drive with the parking brake even partially on for several miles, it's possible to warp a drum or disc. Or if the brakes get really overheated, you can even cause the lining's adhesive to fail, and have the linings crack or even separate from the pads or the brake shoes.
298926
Hot spots occur when uneven brake pads cause areas on the brake rotor to heat up, now this can cause more aggressive brake wear but it can also cause vibration and noise. In the case of the later then I would go ahead and have the brake rotors machined.
855847
Yes, although you might not be able to see it with the naked eye. When pressure is released, the brake pads “pull back” slightly so that they do not actually touch the rotors unless pressure is applied.
1194197
If you are using sticks it would be a good idea to check the torque with a torque wrench a couple times a week. They can go bad pretty quick.
1021476
If you hear a grinding noise, it's likely the brake pads have been worn down completely. If this happens you should not drive the vehicle and arrange for the brakes to be checked and replaced as soon as possible.
298208
If your vehicle has drum brakes and you hear a squeal, it's a good warning sign that your brakes need lubrication. Once the contact points no longer have lubrication, the metal starts to rust. This causes the shoes to scrape on the backing plate and thus the squeal.