You can buy a CV joint boot kit and install it fairly easily if you can find a boot that bolts together in the center. Just cit the old boot off, put the new boot on , install the grease, bolt up the sides, and put on the hose clamp.
remove axle, separate joint inner or outter joint, clean, regrease, and put it back together with a new boot
Consider replacing the axle with a rebuilt unit. When the boot is torn, contaminants enter the joint and quickly destroy it. It is very labor intensive to replace the boot vs an axle which is a do-it-yourself job. In my shop we used to replace boots but because of high incident of joint failure customers were understandably upset. The boot has a life and so does the joint; once the boot tears ,the joint is not far behind. Why do the job twice?
The boot is the rubber cover The boot is the accorion-folded rubber shroud that fits over the ball joint,
The CV joint is the part inside the boot.
I very much doubt you can buy that on it's own. It usually comes only with a balljoint.
If the CV boot is torn open forget about re-booting the joint, buy a remanufactured axle and replace it. If the boot is starting to crack or separate but has not torn open to the point you can see the cv joint itself you can re-boot it.Replacing CV JointsThere are places that sell the halfshaft axles already rebuilt as cheap as you can replace the joints. Call your local parts stores.
there's a product you can purchase at most auto parts stores called a split boot. this eliminates the need to remove the cv joint from the vehicle.comes with instructions on how to apply..
The rubber boot that covers the CV joint is what tears. When the boot tears grease is expelled and water and dirt gets in.
Check the "boot" for cracks and see if there is any loss of grease. The boot is the rubber housing around the CV Joint. If the boot is damaged, grease has escaped and the CV Joint is making noise, the CV joint must be replaced.
A cracked boot itself won't cause a CV joint to make noise. However, a cracked boot WILL cause the grease to be slung out and allow dirt to enter the CV joint. And a contaminated CV joint that is starved for lubricant WILL eventually start to make noise.
It would be easier and quicker to swap out the axle assembly for a rebuilt unit than to try to successfully replace just the boot. If the boot has been torn open for sometime the joint is probably on it's way out anyway.
A boot is a boot in UK and a trunk in US!