Originally Posted by wolfman00
im going to go with everyone else on this, if you have it all apart it only takes a few minutes to repack them so it would never hurt.
I'm going to go out on a limb here....a prety sturdy one......and say that the OP is asking if the wheel bearings need to be REPACKED AGAIN after installing new rotors. Meaning after the install and everything is fine.......to go back take everything apart and repack the bearings a week, two weeks, a month, or 6 months down the road......never gave a real good clear explanation there. Seems a few have missed that point.
The answer is no there is no need to do so. Next time you do a brake job you can check your bearings. If your dust covers are good and no dirt or water got in, your grease should be good.
If you like Redneckstone and like to do it twice a year, then go for it. Whatever helps you sleep at night I guess. LOL