During the'24 nats aftercruise, the car started making an awful metal to metal squeaking noise, apparently rom the front right quarter somewhere. I suspected the rim to hub contact. I couldn't see any defect in the rim without pulling it off, which I was reluctant to attempt, due to a loose stud. One of the studs had got a bit sloppy in its knurled hole in the hub. Re-torquing the nuts during the trip, it jumped the splines and couldn't be properly torqued. I had been noticing that after fitting the HT rims on the hubs, with 3mm alloy spacers, the nuts seemed not o be maintaining the specified torque of 55ftlb.
I removed literally everything from the car after it came home from CEVA to dry and clean. The squeak was still evident taking the car out for a run with nothing on board.
The spinning nut came off easily with the rattle gun. You can see the marks where the spacer and hub were most likely causing the sound in the photo below.

The spacer to wheel contact seems to be good.

I think the underlying problem is running the 14" steel rims on the HR hub. I have had some issues with this on a previous car, which I put down to incorrect wheel nut taper, using the FE HK nuts on HT rims. That was many years ago, but at the time, I considered that this hub to rim compatibility issue had contributed. I didn't wise up to the wheelnuts until much later.
I had all good intentions of removing the hub and doing a proper repair, but in the end I turned up the mig to all but, and placed a few judicious tack welds. Then I slapped the chromies back on.

I will put the steelys to rest or now. I will try them without the spacers next time. The only issue is that I won't enable to run the XU-1 caps, but that is ok.
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