How To : CVT Cover Bearing Replacement

[90GTVert]

CVT Case Cover Bearing Replacement

Begin by removing the CVT cover bolts and pulling the cover off.



Now you can access the CVT cover bearing. If you aren't sure that it needs to be replaced, you can check it very easily. Try rotating the center section of the bearing. Make sure it moves freely and without noise. Use a bolt or other object that fits pretty snug to check for play in the bearing. Look for visual signs of wear. You can see in the image below that my bearing had lost it's seal.



Now you'll need a blind hole bearing puller. I picked mine up from Harbor Freight for just under $40.



There was a problem with Harbor Freight's blind hole bearing puller for this particular job. The smallest attachment was still too large to fit through my bearing. I remedied this by using a dremel to enlarge the hole in the old CVT case bearing until the puller would fit.



Insert the puller attachment and tighten it up so the puller will expand to hold the bearing.





Now attach the slide hammer portion of the bearing puller.



Use the slide hammer to free the bearing from the case. It usually only takes a few pulls to completely free the bearing.





Now unscrew the bearing puller to release the old bearing.





Now is a good time to clean out your cvt cover. Make sure you get all of the dirt and debris out of the bearing's race before installing a new bearing.





Place your new CVT case cover bearinginto the race flat and straight.



Use a bearing/seal driver or a socket and a mallet to drive in the new bearing. If you use a socket, make sure it matches up to the outer edge of the bearing without being larger than the bearing's diameter. Be careful to keep the bearing going in straight.





There's your new CVT case cover bearing. Now just reinstall the CVT cover.

[90GTVert]

Here's an easy way to do the same job without a puller. It does require making a hole in your CVT cover though, so if that bothers you, stick to the previous method.


Start by drilling a hole through the CVT cover, using the hole in the bearing as a guide.




Flip the cover over and drill a bit larger. Drill a hole large enough that you can see the inner part of the bearing when looking through it, so you'll be able to make solid contact with the bearing there.




Put a punch through the hole, contacting the bearing, and drive the bearing out.




Clean and inspect the area where the bearing was, then install the new bearing with a bearing/seal driver or appropriately sized socket. It is very helpful to heat the cover with a heat gun before the new bearing goes in, and the bearing can be cooled in the freezer or with freeze spray (or upside down canned air duster).

[190mech]

This is likely old news to you hardcore Chinarelli dudes,but those little outer bearings buried in the CVT cover poses some removal problems..I'm getting my 103 back running and wanted to replace the CVT cover with a cool casting a friend gifted me,the outer bearing was shot!I didnt want to drill thru the cover to pound the bearing out,so I tried my old buddy,,Bernzomatic torch!Heated the case around the bearing till the grease in the bearing was oozing,filpped the cover over and gave it a few sharp whacks across an old 2X4 and bearing is out!!