Quote:
Originally Posted by AZ_1LE
140 ft lbs is insane for a 5 lug car, especially considering the size of the wheel studs and nuts.
100 ft lbs for me, every time. The first time I ever took the wheels off of the car when it had 15 miles on the odometer, I cracked them loose with my torque wrench which was set to 90. They DEFINITELY were not at 140.
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Why not just go by the owners manual for everything? GM engineered the car to perform safely and effectively using the specifications communicated in the owner's and service manuals. The bolted hub joint has a specification of 190 N-m for a reason - probably not an arbitrary number. I'm guessing it's that high to prevent torque loss in the wheel/hub/bearing joint when exposed to the high forces it can have from braking, accelerating, and cornering.
Mine came from LGR factory with an average of 185 N-m breakaway torque on all the lugs. So pretty close to the spec of 190 N-m and probably the difference between my calibrated torque wrench and the factory tightening method.