How to tell if rotors are warped? How do we test the warped brake rotors? new for 2022

You’re driving down the road and suddenly your car starts to shake. You pull over and realize that one of your brake rotors is warped. Afterwards, you wonder that how do i know if my rotors are warped?

How to tell if rotors are warped?
How to tell if rotors are warped?

One of the most important aspects of keeping your car running smoothly is making sure that the rotors are in good condition. Warping can cause your rotors to lose their shape, making them ineffective and potentially dangerous.

Today, we will provide you some important information How to tell if rotors are warped?  and also mention How do we test the warped brake rotors? This is definitely useful knowledge you should accumulate for yourself.


How to tell if rotors are warped?

How to tell if rotors are warped?
How to tell if rotors are warped?

There are some noises made by the car’s brakes

If you hear screeching, grinding or other unusual noises when you press the brake pedal, the rotors may be warped and in need of replacement. The noise is usually most noticeable when you first start driving after the vehicle has been sitting for a while. Warped rotors can also cause vibration in the steering wheel or brake pedal.

There is vibration in the steering wheel or brake pedal

If the pedal seems to tremble when used, there is most likely a problem with the rotors. Warped rotors will not perform as smoothly as fresh ones, and this may be detected via pedal vibration.

When the brakes are engaged, the vibration may also be felt in the steering wheel, albeit this is less typical than experiencing the vibration in the pedals.

Uneven braking

If you notice that your vehicle is braking unevenly, with the front or rear wheels locking up more often than usual, this could be a sign of warped rotors. This can be dangerous as it can cause the vehicle to skid out of control.

There are grooves on the rotors

If any of the following problems (or other problems) arise, and the person suspects it is due to warped rotors, they may inspect the rotors for grooves. The rotors should be rather smooth, but if there are deep score marks or grooves in them, this might indicate bent rotors. This may be seen simply by inspecting your vehicle’s tires, however the tires may need to be removed to check for grooves.

Brake calipers that aren’t working

A malfunctioning brake caliper may exert too much force when squeezing the rotors together, putting too much stress on an overheated brake rotor and causing it to go off-balance, resulting in warped brake rotors.

Wheel bearing failure

If your wheels are not bent but there is a wobble, the cause is most likely a worn out wheel bearing with excessive play. This may result in deformed rotors and uneven brake pad wear, among other problems. If a broken wheel bearing is to blame, it must be replaced or the warped rotors and uneven brake pad wear will persist.

That all some symptoms which show you what do warped rotors feel like. If you have ever experienced these warning sign, your rotors can definitely warp.

What are the reasons making warped rotors?

What are the reasons making warped rotors?
What are the reasons making warped rotors?

Problems with the braking system

If your rear brakes fail, for example, your front brakes will have to work harder, heating up your rotors. Perhaps you have a clogged caliper (the mechanism that houses and operates your brake pads).

If your shocks aren’t working properly, they might be the main cause of rotor warping by shifting too much weight to the front when braking.

Wheel has been torqued properly when installed

When you have a wheel installed and someone hasn’t torqued it properly, your rotor will be stressed. Any of these issues can cause the excessive heating that is warping your rotor.

Rotors are made of cast metal, and the heat generated by braking can help to relieve casting stress. That is when your rotors may distort, particularly if they are worn thin. You may not be able to see your distorted rotors, but you will most likely feel them.

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Bad habits when driving make the rotor warping

Habits that may be contributing to the problem:

-Riding your brakes.

-Towing a heavy load.

-Making sudden stops.

-Driving too fast.

Any of these can cause your rotors to warp from the excessive heat.

How do we test the warped brake rotors?

How do we test the warped brake rotors?
How do we test the warped brake rotors?


– Jack and jack stands or a hydraulic lift

– Lug nut wrench

– Caliper piston reset tool (if necessary)

– C-clamp (optional)

– Brake caliper grease (optional)


1. Park your vehicle on a level surface and set the parking brake. Loosen the lug nuts on the front wheels with your lug nut wrench, but don’t remove them yet.

2. Raise the front of your vehicle with a jack and place jack stands under the frame or use a hydraulic lift.

3. Remove the lug nuts and wheels.

4. Inspect the brake rotors for warping. Place a ruler or measuring tape across the face of the rotor. If the rotor is warped, you will be able to see light between the ruler and the rotor in at least two places.

5. Inspect the brake pads for wear. If the brake pads are worn down, they may be causing the rotors to warp.

6. Reset the caliper pistons if they are sticking. Use a caliper piston reset tool to push the pistons back into their bore.

7. Grease the caliper slides if they are sticking. Apply a small amount of brake caliper grease to the caliper slides and work it back and forth to lubricate them.

8. Reassemble the brake caliper and install the wheel. Torque the lug nuts to the manufacturer’s specifications.

9. Repeat steps 1-8 for the other side of the vehicle.

10. Test drive the vehicle to see if the problem is fixed. If the problem persists, you may need to have the brake rotors machined or replaced.

Warped brake rotors can be caused by excessive heat, such as from hard braking or towing a heavy load. If you suspect your rotors may be warped, have them inspected by a qualified mechanic.

How do we fix the warped rotors?

How do we fix the warped rotors?
How do we fix the warped rotors?

Replace them

The best way to deal with warped rotors, is, of course, to prevent them. But if you do end up with warped rotors, the best way to fix the problem is to replace them with new ones.

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You could have your old rotors machined, but that’s really just a temporary fix. Warped rotors are more likely to warp again after being machined, so it’s best to just replace them. Plus, new rotors are inexpensive. You can usually find a good quality set of rotors for around $50 per rotor.

Machine them

Machining rotors is a process of grinding them  down to a smooth surface. This removes any imperfections and makes them true again.

However, machining rotors will also remove some metal, making them thinner and weaker. This means they are more likely to warp again in the future. So while machining your rotors may be a quick and easy fix, it’s not the best long term solution.

FAQs How to tell if rotors are warped

Why are my rotors warping so fast?

The brake rotors are designed to withstand a lot of heat during braking, and need to dissipate this heat quickly so that the brake pads will be able to work again. Because of this mass amount of heat, the surface of the brake rotors can become uneven over time, which is often referred to as warping.

Do cheap rotors warp easier?

Thinner rotors result in less material, which means less resistance to heat and a greater susceptibility to warping.

Can warped rotors damage calipers?

The brake rotor may become warped, which will cause the pads to wear more quickly than necessary. In addition, this can also damage the calipers, which can be a costly mechanical repair.

How much does it cost to replace warped rotors?

If your brakes need to be replaced, you will likely spend between $200 and $400 for the parts and around $150 for the labor. This means replacing your brake rotors will cost you between $400 and $500.

How long can you drive on bad rotors?

Vehicle brake rotors can last for between 30000 and 60000 miles, depending on your driving styles and vehicle type.

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Can rotors warp from sitting?

Rotors can become warped if they stay in place after being hit, but this is not always the case. In fact, rotors don’t actually warp – the reaction between the pads and the rotors leaves a substance on the rotor which, if distributed unevenly, causes the vibration.

How much heat does it take to warp a rotor?

Brake pads will start to fade soon after they reach temperatures above 400°F. This off-gassing pushes the brake pad away from the rotor surface, causing “brake fade.”

How long should rotors last?

The lifespan of your car’s rotors can vary depending on the above factors, with most lasting around 30,000-70,000 miles.

Do I need an alignment after replacing rotors?

Front-end alignment is not necessary after replacing a brake rotor.

When should rotors be refaced?

If your brake rotor is worn, cracked, or warped, you’ll need to replace it. Additionally, if you’re going to resurface the current rotor with a thinner material than the manufacturer recommends, you’ll need to get a new one.

How do I balance my rotors?


Our teams from have just listed some common signs to explain for this question how to tell if brake rotors are warped? If you are experiencing any of the signs of warping, it is important to bring your rotors in for inspection. By doing so, you can avoid potential damage and keep your car running smoothly. Hopefully, this article is helpful for you. Thank you for reading!

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