Ensuring a safe and smooth journey on the road requires a well-functioning car transmission system. Key players in this system are the Constant Velocity (CV) joints, responsible for maintaining a steady transfer of torque to your wheels. Let’s delve into the significance, signs of wear and how to replace CV joints.
Understanding CV Joints
The acronym ‘CV’ stands for constant velocity which describes the primary function of these joints. CV joints are common in front-wheel drive cars but are also present in rear-wheel and four-wheel drive vehicles. They play a crucial role in transferring power from the engine to the wheels with flexibility and efficiency.
Positioned at the ends of the axle shaft, CV joints facilitate the seamless delivery of power from the engine to the wheels at a consistent speed. CV joints work smoothly even when the suspension is compressed or during full-range steering, maintaining optimal functionality without compromise. This ensures a consistent transfer of power from the engine to the wheels under various driving conditions.
CV joints contain lubricating grease to ensure smooth movement, safeguarded by a flexible rubber boot that prevents the intrusion of road debris. Front-wheel drive vehicles commonly use ball-type CV joints on the outer side and tripod-type joints on the inner side of the driveshaft among the different types available.
Step-by-Step Guide on How to Replace CV Joints
Replacing CV joints and axles involves several steps and it’s important to follow the specific instructions for your vehicle, as procedures can vary. Here’s a general guide that you can follow to replace CV joint axles. However, please consult your vehicle’s service manual for accurate information. Additionally, if you’re not comfortable or experienced with this type of repair, it’s recommended to seek professional help. Here is how you replace CV joints.
Step 1: Gather Materials and Tools
Get some essential tools for DIY car fixes such as:
- New CV joint and axle assembly
- Jack stands
- Hydraulic jack
- Lug wrench
- Pry bar
- Screwdrivers
- Pliers
- Hammer
- Torque wrench
- Socket and ratchet set
- Cotter pins
- Grease gun
- New cotter pins
Step 2: Ensure Safety
Prioritise safety precautions by parking the vehicle on a level surface, engaging the parking brake and wearing appropriate safety gear. This includes gloves and safety glasses. Safety should be a top priority throughout the entire process.
Step 3: Lift the Vehicle
Utilise the hydraulic jack to lift the front or rear of the vehicle, depending on the axle you’re replacing. Once lifted, secure the vehicle on jack stands to provide a stable working environment. Here is how you can use the car jack properly.
Step 4: Remove the Wheel
The next step to replace CV joints is to remove the wheel. Use the lug wrench to remove the wheel on the side where you’ll be replacing the CV joint and axle. This step provides access to the components that need work.
Step 5: Disconnect Suspension Components
Start by removing the cotter pin from the castle nut on the ball joint. Proceed to loosen and remove the castle nut. Use a pry bar to carefully separate the ball joint from the steering knuckle. Also, check the signs of bad ball joints when disconnecting suspension components.
Step 6: Disconnect Brake Components
Remove the calliper bolts and hang the calliper out of the way. If necessary, detach the ABS sensor or brake line, ensuring that brake components are appropriately handled during the process.
Step 7: Remove the Axle Nut
Locate and remove the axle nut using the appropriate socket. This is a crucial step in releasing the CV joint and axle from the wheel hub.
Step 8: Remove the CV Joint and Axle
Using a pry bar, gently release the CV joint from the car’s transmission or differential. Pull the axle out from the wheel hub, carefully navigating through any obstacles in its path.
Step 9: Install the New Axle
Insert the new axle into the wheel hub assembly, securing it properly. Pay attention to aligning the splines and push the axle into the transmission or differential, ensuring a snug fit.
Step 10: Reassemble Components
- Reattach the ball joint to the steering knuckle and tighten the castle nut.
- Install a new cotter pin.
- Reconnect the calliper, ABS sensor and any other components you detached.
- Tighten the axle nut to the manufacturer’s specifications.
- Put the wheel back on and lower the vehicle.
Signs of Worn CV Joints
Identifying worn CV joints is crucial for maintaining the optimal performance of your vehicle. Here are some key signs that may indicate that it is time to replace CV joints:
Squealing Noise During Gear Changes
A noticeable squealing noise, particularly when shifting gears, could signal issues with your CV joints. This sound may indicate malfunctioning joints that could be wearing out. The noises can also be one of the symptoms of bad wheel bearing. Besides, here are some more reasons for squealing noise coming from your car.
Clicking or Knocking Noises during Full-Lock Turns
When making sharp turns, especially at full-lock positions, if you hear clicking or knocking noises when turning the steering, it’s a clear indication that the CV joints may be worn. This is often caused by increased stress on the joints during extreme steering angles. Here is our step-by-step guide on how to change the power steering pump.
Vibration during Acceleration
If you experience an unusual vibration, especially during acceleration, it could be a sign of CV joint wear. As the joints deteriorate, they may fail to maintain a constant velocity, leading to vibrations transmitted to the vehicle.
Lubricant Leakage from the Joint Boot
The CV joint is packed with lubricating grease, which is essential for smooth movement. Grease leaking from the boot around the joint means the boot is damaged. Time to check and fix it. This can accelerate wear and lead to further issues.
Visible Damage or Cracks in the Boot
Regular visual inspections of the CV joint boots are essential. If you see cracks or damage to the CV joint boot, dirt and moisture can get in, causing faster wear and shortening the joint’s life.
Axle Grease Splatter on Wheels or Underneath the Vehicle
Inspect your wheels and the undercarriage of the vehicle for any signs of axle grease splatter. If you notice grease outside the CV joint area, it indicates a potential breach in the boot’s integrity. It also allows contaminants to enter and affect the joint’s performance.
Uneven Tyre Wear
Worn CV joints can lead to uneven tyre wear. If you observe abnormal wear patterns, such as excessive wear on one side of the tyre, it may be indicative of CV joint issues. These problems usually affect the wheel alignment and stability of the wheel.
Difficulty Steering or Turning
A compromised CV joint can impact the overall handling of the vehicle. If your car has a hard steering wheel, especially when going slow, it could be a sign of an issue with the CV joints. These joints help transfer power smoothly and if they’re not working well, it can also make your car steer bump.
If you notice any of these signs, it’s advisable to have your vehicle inspected by a qualified mechanic. Timely attention to worn CV joints can prevent further damage, ensuring a safer and more enjoyable driving experience.
How Much Does a CV Axle Cost to Replace
Determining the exact CV joints replacement cost can be challenging, as it depends on your car’s make, model and the extent of the damage. If a damaged boot is detected before the joint itself is compromised, a simple boot replacement and grease repacking may suffice, avoiding a full joint replacement.
FAQs
Can I replace the CV axles by myself?
Yes, it’s possible to replace CV axles yourself if you have the necessary tools and skills. For that, you need to follow proper safety precautions.
How long does it take to replace CV axles?
Replacing a single CV axle typically takes about 1.5 to 3 hours. If you’re replacing all four axles, it can take up to 12 hours, factoring in both parts and labour costs. However, replacing only one axle is usually sufficient if needed.
In most cases, however, detecting a split boot before joint damage occurs is difficult, necessitating a complete CV joint replacement.
This is all about how to replace CV joints. If you are looking to buy a used car in the UAE, explore the range of options here.
Stay tuned to the dubizzle car blog for more DIY tips.
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