When I first got my 1992 745 with alloy wheels, I continued to use the same torque wrench for the wheel nuts that I used for my Camaro, which I had set at 100 lb-ft. After all, the studs were the same size and the wheels were also alloy. I know that thinner stamped steel wheels require lower torque. All this time I experienced no trouble, until just recently, after a winter's driving, when I had to service a seized guide pin on a front caliper. I found I needed a four foot pipe to break the nuts loose. Good thing I never had to change a flat tire on the road, or I would have had to call CAA.
Upon checking the FAQ, I now see that the specified wheel nut torque is 66 lb-ft, not even the 70-80 lb-ft you find on the net for studs this size. Obviously, the Volvo does not like wheel nut torques as high as other cars. But why is that?
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