Driveshaft Runout - Measured

FL335i · September 5, 2017

I've been reading PI 1354C regarding the vibrations and checks they have outlined. I finally got around to checking the driveshaft today. I checked the front, center and rear as the PI calls to do. The rear was pretty low, under .010" of run-out. Front had the most, around .015" of run-out. Center was .012". According to the PI, .050" is the spec, but they recommend being under .020" for best results. I wold say I am under the .020 and am in the best results range. So as it goes for the driveshaft, mine can only be out of balance at this point.

While I had the rear on jacks, I checked the wheels for run-out. The PI refers to another tech write-up on how to do the wheels, I don't have that write up. I came up with my wheels both having about .005"-.007" of run-out. Not sure what spec is.

Now that my Ko2's have about 12k miles on them, I'm going to find a local shop that has the Hunter 9700 and see if I can witness the balance and verify they're under 15Lbs. I noticed the PI indicates the Hunter 9700 to NOT be in smart weight mode.

Thought I would share my findings.