The Constant Velocity boot or the CV boot is the rubber casing that you can find covering your CV joint at the CV axle of your car. They are all part of the shaft assemblies used in front-wheel-drive and four-wheel-drive vehicles. In the case of four-wheel-drives, they are called half-shafts because there is one assembly each for the front and rear portions of the vehicle. The shaft assemblies supply torque to the wheels while they are turning and to the suspension while it is moving up and down.
The CV boot protects both the inner and outer portions of the CV joint and keeps away water, pebbles, and other road dirt from entering into and damaging it. The inner CV joint controls changes in suspension and ride height, while the outer one provides even torque transfer. So when the boot is ripped or cracked, the lubricant inside it could spread and mix with the dirt, damage the joint even more, and affect steering and suspension. Damage to the CV boot leads to damage to the CV joint, sooner or later.
It is therefore wise to attend to the littlest sign of defect in the CV boot immediately. Doing so could save you money because the CV joint is much more expensive to replace. You will know that something is wrong with your CV boot when you hear of a clicking sound while your wheels are turning and feel a shudder while you are accelerating or decelerating. Replacement CV boots and joints are readily available in stores and you may want do the job yourself if you want to save money. Some car owners find it more practical to replace their CV axles along with their CV boots. You should consider it, too, after calculating the costs.
CV Boot Buyer's Guide
- The CV boot protects the CV joint from external elements that may damage the ball bearings or the entire joint
- Made of plastic or rubber and is sometimes referred to as CV gaiter.
- You may find the CV boot in areas where the CV joint is used, such as the driveshaft and axle shafts.
- Without the CV boot, you’re looking at a possible early CV joint damage due to busted subcomponents.
- CV boots are meant to do two things: protect the CV joint and support the dynamic movements of the joint with little to no resistance.
- Features a spring-like structure that allows it to expand and compress without stretching the material—which is crucial since CV joints operate at certain angles.
- A cracked CV boot may not sound alarming for most people but a failing CV joint is a safety concern.
- Most CV boots are rated to last for up to 80,000 miles before a replacement or repair is needed but impact damage can compromise their longevity.
- The aftermarket CV boots you can find on CarParts.com are priced anywhere between $14 and $89.
Power is generated inside the engine when the air-fuel mixture combusts. And for that power to reach the wheels, a driveshaft connects the transmission to the rear differential, which then changes the direction of the to make the wheels rotate.
Driveshafts are connected by various joints. One of the joints that link the driveshaft is the constant-velocity joint or CV joint. The CV joint transmits power at a variable angle and at constant rotational speed, all while minimizing friction. Most vehicles with CV joints are front-wheel drive, although modern rear-wheel-drive vehicles have them on the rear axle halfshafts.
The CV joint is kept from external elements by a rubber or plastic sleeve known as the CV boot that’s filled with molybdenum disulfide grease. If you’re reading this article, we assume your CV boot is out of shape. Here are the things you should know about the CV boot.
What is a CV boot?
As mentioned, the CV boot protects the CV joint from external elements that may damage the ball bearings or the entire joint. It’s made of plastic or rubber and is sometimes referred to as CV gaiter. Inside the boot is molybdenum disulfide grease that lubricates the movement of the ball bearings as the joint operates. You may find the CV boot in areas where the CV joint is used, such as the driveshaft and axle shafts.
Why is a CV boot important?
Without the CV boot, you’re looking at a possible early CV joint damage due to busted subcomponents. If the CV joint fails, it will produce symptoms that will eventually lead to bigger issues that may require painstaking and expensive repairs. An exposed CV joint is the last thing you’ll want a shaft to have as it will undoubtedly fail sooner than you can anticipate.
How CV boots work
CV boots are meant to do two things: protect the CV joint and support the dynamic movements of the joint with little to no resistance. Protecting the CV joint is its main task, as external elements may get caught up between the moving parts of the joint and cause premature wear. It also contains grease to ease out the movement and prolong the longevity of the metal parts.
Its appearance, on the other hand, which features a spring-like structure that allows it to expand and compress without stretching the material. This is crucial as CV joints have a certain angle in which they operate.
Symptoms of a failing CV boot
There will be no early symptoms for a torn or cracked CV boot. However, you may begin noticing signs once the damage becomes so severe that the problem reached the CV joint. A cracked CV boot may not sound alarming for most people but a failing CV joint is a safety concern.
Keep in mind, the CV joint is designed to last for a very long time for as long as the CV boot is doing its job. Once the CV boot starts to leak the grease and allow particles inside the joint, serious problems will arise. Here are the symptoms of a failing CV joint as a result of a damaged or worn-out CV boot.
- Loud turning sounds
- Uncomfortable ride
- Grease running down on wheel or tire
- Knocking noises
When or how often should you replace the CV boot?
Most CV boots are rated to last for up to 80,000 miles before a replacement or repair is needed. However, a lot of things can happen when you drive and the CV boot is not that concealed under your car. Impact damage can cause the plastic or rubber material to crack open and leak the grease that was once tightly sealed.
A good rule of thumb would be to conduct a regular check-up. A visual inspection should tell if the boot is not in its good shape.
Can you drive with a leaking CV joint boot?
A faulty CV boot is not a big concern but, like every problem, it could get a little shaky once the damage reaches the important parts. The CV joint links a shaft to an important component and these components are often rotating at high speeds. And although a bad CV boot won’t do you harm, a damaged CV joint will. In short, avoid driving your car if you already know that the CV boot is damaged or is not doing what it’s supposed to.
Replacing a CV boot
CV boots don’t usually require regular maintenance and are also not part of the components that are included in periodic replacements. If you find your CV boot damaged, always remember that it’s better to deal with it as soon as possible. CV boot repair or replacement is relatively easier and low-cost compared to replacing a damaged CV joint. However, you’ll need a CV boot clamp tool for an easier job.
How much are CV boot replacements?
The aftermarket CV boots you can find on CarParts.com are priced anywhere between $14 and $89 depending on the brand, series, and vehicle model fit. You can buy it in single pieces, in sets of 2, or as part of a kit. These are among the high-quality CV boots you can find in the market at a discounted price.
Finding the right fit
You can easily search for model-specific CV boots to avoid buying the wrong parts for your vehicle. Input your car’s year, make, and model in our website’s filter tool to narrow down the list with the parts compatible with your vehicle.
Important Facts You Need to Know About CV Boot
Maintain proper vehicle handling even when you drive in high speeds/ Purchase a high-grade CV boot kit now/
As a performance enthusiast, the last thing you need is bad handling. Sure, flat-out speeds are nice but somewhat hazardous to your health if you don't have the handles to complement them. That's why it's important to maintain a smooth rotation on your wheels. To do this, there needs to be a steady transfer of torque to your drive shaft. That's where the Constant Velocity (CV) joint comes in. However, the CV joint needs protection from the CV Boot Kit.
The main function of a CV quick boot kit is to give you everything you need to prevent road debris from entering the CV joint. Aside from protecting the components of the CV driveshaft, the CV boot is used to hold in the grease in the CV joint. This kit comes with one new boot, clips, grease, and clamps. OE CV boots are made from neoprene, which is more scratch resistant and durable compared to plastic and rubber. Additionally, installation is easy because the kit contains all the necessary components.
Protection for the CV joint is a must. That's why you have to make sure that your car is equipped with a premium CV Boot Kit. Once protected, you can be sure your wheels will be performing way beyond your expectations.
CV Boot: Just the Facts
Torn boots always mean bad news, especially if said boots cover the constant velocity (CV) joints on your car's wheel axles. Aside from spinning the wheels whenever you hit the throttle, CV joints also let the axles flex in any direction.This allows the wheels to keep spinning despite irregularities on the road. A CV boot covers each joint for protection against road debris and moisture. When the boot gets damaged and mud or water comes into contact with the CV joint, you can expect your smooth driving experience to go down the drain.As the grease lubricating each joint becomes more contaminated, your vehicle becomes more difficult to maneuver through bumps and potholes on the road. Without a CV boot to protect it, the CV joint would also wear out prematurely, leaving you no choice but to shell out big bucks for a CV joint replacement.Don't let the problem get that bad-replace the CV boots when necessary. For high-quality, affordable CV boots, you can trust CarParts.com.
• Protect the CV joints from premature damage
• Engineered to fit most stock CV joints
• Designed to withstand constant exposure to road hazards and debris
CV Boot: What Every Car Owner Should Know
Understanding the importance of constant velocity (CV) boot requires knowing the basics of CV joint. These two are inseparable! Vehicles with modern axles are equipped with CV joints. The inner CV joint is responsible for taking care of changes in ride height and suspension, while the outer CV joint makes sure torque is evenly transferred to the CV shaft.Now, to protect the CV joint from road grime and debris is the task of the CV boot kit. Made from rubber casting, each of the kit's CV boots prevents water, dirt, and other minute debris from entering the CV joint and damaging it. So you shouldn't put off replacing worn-out CV boots!Using damaged CV boots puts the CV joints in danger as well. When looking for the best CV boot kit for your vehicle, trust CarParts.com and take advantage of our discounted prices.
• Protects your vehicle's CV joints from damage
• Includes CV boots for both the inner and outer CV joints, and the needed clips for attaching the boots to the CV joints
• Last longer provided that grease is properly applied
What You Need to Know About CV Boot
The CV Boot or Constant Velocity Boot is common among cars with front-wheel drive and all-wheel drive. This piece of rubber or plastic is what protects the constant velocity joint from all the bumps and vibrations. Without it, the CV joint can be easily damaged that would then later on harm your car's drive shaft.
The function of the CV boot is not the only thing that there is to know about this auto part. There are several things that you also have to learn in case you're having problems with this component, or if you're planning to buy a new one for a DIY replacement job.
The CV Boot's Job
A CV boot can be made of plastic or rubber. This covers the CV joint to make it last longer and to prevent it from wear and tear. The CV boot also keeps all the grease or lubricant in the CV joint from leaking while at the same time, inhibiting dirt and dust from sticking on it.
The Types of CV Boot
There are two types of CV Boot. For each CV joint located in the front wheels, there is an inner and outer boot. These are used for the two joints for each half shaft. However, in some vehicles, they also use the CV joint for the rear wheels. In this case, the two types are the front and the rear boots.
You can find two types of boots that are available in the market; one is the clamp-on type of boot. Upon installing this type of boot, you might need to remove the entire wheel assembly to attach the boot to the drive shaft. On the other hand, after-market universal CV boot require less effort and time for this boot uses a zipper type assembly, which is easier to set up.
When you visit an auto parts store, you can see a wide variety of available CV Boots. Before you purchase one, always make sure that you're getting the right one. In case you're a little confused, refer to your vehicle owner's manual for the right information about the specific boot that your car requires. You can also ask the store personnel for tips and pieces of advice.
A CV Boot Replacement Project
Constant Velocity joints and boots are more commonly used among front-wheel-drive vehicles. If you have one, you have to pay attention to the CV boot every once in a while. Just like the other maintenance parts in your car, the boots loses its capability through time due to wear and tear.
Old boots can do a lot of harm to your car's constant velocity joints. When the CV boots are cracked or broken, all the grease that lubricates the joints leaks out. High friction between the metal joints would eventually result in damages not only in the joints but also in the drive shaft. When all the grease drains out of the boot, dirt, sand, and other contaminants enter the joint and deposit there through time. There comes a point when the CV joint gives in and breaks.
You can prevent all these from happening by keeping a maintenance check schedule. Once you find out that you need to replace your car's CV boots, don't waste any time; do it ASAP.
Gear up and prepare for your CV Boot replacement project.
Here are the tools that you need:
- Floor jack
- Mallet or hammer
- New CV Boot
- CV Joint Grease
- Socket and ratchet
- Bench vise
Here are the steps:
Step 1: Place the car on a level surface. Make sure that the car will not move or roll during the whole process to avoid accidents. Another safety tip, wear protective glasses, hand gloves, and work shoes to defend yourself from any harm.
Step 2: Using a jack, lift the front part of your car. The car would stay firm if you place the jack in the pinch welds and the frame.
Step 3: Remove the front wheels by loosening the lug nuts. Use the right-sized socket and ratchet to do this.
Step 4: Use your bench vise to remove the CV joint from the shaft. You can now see the clamps holding the CV boot. Remove the clamps to release the CV boot. You can use a rubber mallet to knock off the CV joint from the axle shaft.
Step 5: Clean the area where you removed the old CV boot. Wipe off any grease residue.
Step 6: Put grease on the CV joint before sliding it back to the shaft.
Step 7: Place the new boot and don't forget to replace retaining clips before clamping the joint and axle together.
Step 8: Put the CV joint back. Fill the boot with grease then slide the boot in the CV joint housing. Replace the old clamps.
Step 9: Put the wheels back again and make sure that all the lug nuts are back in place.
Step 10: Lower the vehicle by removing the jack carefully. You can do a drive test to make sure that there is no noise that indicates installation problems.