rbpru wrote:
I do not know what the tire shop set the torque of their air guns at but it was more than the 150 lbs I set my wrench too.
I torque to 90 lbs and check when get to my desination. I have never had it change after the third check.
If the pre torque (air gun) is more than the desired torque then the torque wrench is just a placebo and might as well stay in the case. The torque wrench needs to turn the lug nut in order to be effective. If over torqued, loosen one lug nut and re torque. Move to the next lug nut in the pattern and do the same. This technique will eliminate any cross talk between the lug nuts. Use good technique when loading the torque wrench and the nuts will be right on.