ever loosening wheel bearings....

malcolm;9030 wrote: In my personal experience when first installing the hub after new brgs I tightend the nut very hard to fully seat everything then backed it off then reset the nut per the WSM.

Recall your seating 4 cones and 2 races per side.

isn't that just 2 tapered bearings and 2 inner races? per wheel

Stan,

Same thing happened to me. I replaced the bearing races, pressed in new cups and, of course, updated the seals as well. After that I turned the clamping nut as directed by various posters (elsewhere) and what I found in this excellent youtube video:

(demonstration on a 944).



Thought I: 'Hey, this is just like my old bicycle wrenching days!!! A repack...what could be easier?!' Famous last words, right? Sure enough, I could feel a vibration during my test drive. What's this?! Well, what I didn't do was follow the adjusting of the clamp by putting the wheel back on to see what the additional leverage one gets had to say about my handiwork. Two adjusting sessions and test drives later, I thought the problem must be about getting the grease worked in (or is that worked out?) Anyways, afterwards I spoke to a local expert who suggested that leaving a little play was a good idea thanks to the magic of thermal expansion. Certainly, a little play seems to disappear after a 15-20 minute drive...

When I used to set up the old style cup-and-cone, loose-bearing bicylce wheels for track racing it was fine machine oil and some play to be sure. Not that there was much expansion--to my knowledge anyways but, one just felt better for this type of set-up.

Roger C.

Attached files [img]media/attachments/9122=1031-P2200002 resized.jpg[/img]

Video looks great, thanks. Definitely not how I was using the screwdriver....

I did drive @400 miles this weekend, and while there is still something going on in the front end, it may not be the bearing any more. I will check it again, just to be sure.

At one point I was told I had a bent wheel, but I have received so much incorrect information from mechanics, I am hesitant to act on it.

I did have loose bearings before all this started, and thought refreshing them on a 165k mile 928 with unknown service was a modest investiment

Stan, I've had this happen on my car a couple of times when I installed new bearings. Have not had it happen on a customers car though, makes no sense to me but it happened. Just test it with the wheel on and if it's loose, go in and re-tighten it, unless it was really, really loose, there won't be any damage.

I felt the vibration returning, so I checked it again today, and it was loose again.....

I am wondering at some point how does one determine if the spindle has been worn down, or is that possible?

malcolm;9518 wrote: .....or the new bearings are no good?!

Well, I changed the bearings because the right side was loose, and I had adjusted it once already, so since the car has 165k+ miles and I had no idea how old the bearings were, or when they had been repacked, I chose to change them. There isn't an issue on the left side, just the right side, same as before....