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Step 1
Click to enlargeConstant Velocity Joints or your CV boot or joints are often attached to the front drive shaft of the car. They are what accommodate for the front wheel suspension in addition to aiding in the transfer of torque to the front wheels.
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Step 2
Click to enlargeThe joints are encased by a rubber boot and is packed with grease. Generally the joints are very robust and last a long time. The only problem is that the boot that covers the joints ball bearings tend to tear from time to time leaking out the grease that is used to oil the bearings. Generally when the grease leaks out you will hear a knocking noise when you make a turn. Depending on where the noise radiates will determine what side has the issue.
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Step 3
Click to enlargeAs you can see from the image on your left the CV joint has two boots an inner boot and an outer boot. You can visually inspect these by jacking up your car and turning your wheels to the left and right.
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Step 4
If you can catch this tear early enough you can save yourself a lot of headaches by just replacing the boot. Generally it's safe to check your CV boots at least once every 30000 miles. If you don't you will most likely have to replace the entire axle. In addition if you change one side always at least check the other side to see if it needs repair or replacement.









Comments
sunshine11219 said
on 1/5/2009 good article well written