JARblue

I tried adjusting this nut today. 5-1/2 years and 82K miles on my Z and lots more gunk around the nut than in OP's pic. About 3/4 turn got it to tighten up a bit. But I gave it at least another 1/2 turn and am still not happy with the play in the steering wheel. FWIW, I had a lot of trouble finding a 23 mm socket in local stores - a 15/16 spline socket ended up working just fine. I have an appt with a dealer tomorrow to look at something else, so I'll have them check this out at the same time.

Update: I had the dealer replace the steering rack two months later under warranty. They also confirmed that nut should not be adjusted. After replacement the steering returned to normal - no issues after 6 months.

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