ive always heard that you dont want to grease roller bearings like these or modern pulley bearings in serpentine systems, the thin clear grease they come with is what they are designed for & all thats needed. been told that adding the wrong thick grease like chassis or wheel bearing grease causes the balls to not roll right & can or will make them slide on the race & not roll.
not sure if thats 100% true but ive been told that by reputable long time mechanics as well as bearing manufacturers when i asked about greasing them. yes the factory installed grease can dry up but usually not until the end of its service life, maybe adding some grease at that point can extend the life a bit but ive always trusted the dont add grease thing & left them alone with what they come with. just mentioning what ive heard a lot more than one time on greasing roller bearings.
for removing a pilot bearing thats a bugger to get out i did use the trick of packing the crank bore with grease & using a rod just a tad smaller than the bearing opening to pound it in & have the grease force the bearing out.
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