overtightening lug nuts..
#1
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overtightening lug nuts..
I have heard that if you use an air gun you can overtighten lug nuts and damage rotors.....my question is, Do some, most, places set the pressure on theirs so this won't happen. If I ask them to hand tighten lug nuts, and they say that they set pressure on guns so this won't happen, I'm just wondering if that is true or they are just lazy..??
#2
nope they are lazy.... industrial air guns even on the lowest setting tighten to about 200 foot/pounds.... way more than most anything should ever get.....
i know america's tire company uses pre-torque sticks then actually torque them down after... the torque sticks are pretty good, a lot better than the unmolested power of the gun..... but they to overtorque, its just the nature of using air tools to tighten stuff.... and yes, it can warp the rotors
i know america's tire company uses pre-torque sticks then actually torque them down after... the torque sticks are pretty good, a lot better than the unmolested power of the gun..... but they to overtorque, its just the nature of using air tools to tighten stuff.... and yes, it can warp the rotors
#3
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Originally Posted by ugabulldog
I have heard that if you use an air gun you can overtighten lug nuts and damage rotors.....my question is, Do some, most, places set the pressure on theirs so this won't happen. If I ask them to hand tighten lug nuts, and they say that they set pressure on guns so this won't happen, I'm just wondering if that is true or they are just lazy..??
However, if they DO overtighten and you can document it, they have to pay for damages, just like if they undertighten and a wheel falls off (have seen both, usually with overtightening the bolt shears).
#4
depending on where you go, they might use a pretorque stick, i can tell you that even these for the correct rating on your vehicle thye still overtighten, by around 20 ft/lbs but it is a lot better than having them cranked on with the gun on the regular setting.....
the old company i worked for, if you told them to hand tighten it, they would, because you asked...... and if there was a problem, you would call the corporate office, complain, and htye would take care of the issue, normally resulting in a check being mailed to you....
the old company i worked for, if you told them to hand tighten it, they would, because you asked...... and if there was a problem, you would call the corporate office, complain, and htye would take care of the issue, normally resulting in a check being mailed to you....
#6
they are weaker than regular metal, and are brittle they snap into pieces if there is too much torque applied to them.... they do overtorque the wheels though, i know they arent supposed to, but they still do it......
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#9
at that point you tell them corporate will be hearing about it, and any damages will be coming out of that store..... no matter how pissed a mechanic gets at the customer, ultimately its the customer's money and vehicle, even talking to the manager @ that point will get things cleared up quick!....
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I never let anyone near any of the wheels ont he 3G or Taco with an impact wrench. Mainly becuase of the overtightening. I usually set hte torque spec myself (72ft. lb.).
Also, the wheels ont he 3G are painted (AR ATX Victor), and an impact wrench can hcip the paint.
Also, the wheels ont he 3G are painted (AR ATX Victor), and an impact wrench can hcip the paint.
#11
after Discount Tire stripped a bunch of the wheel studs by using a torque wrench, I've started insisting that places do the tightening by hand. Most are decent about going ahead and doing that ...
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I think Rocky is using the term "torque wrench" in the place of "impact or air wrench".
A torque wrench is a hand tool which clicks or otherwise indicates when you have reached a certain torque value, whereas a impact wrech is an air powered tool which can provide extremely high torque, with no real control over the final torque.
A torque wrench is a hand tool which clicks or otherwise indicates when you have reached a certain torque value, whereas a impact wrech is an air powered tool which can provide extremely high torque, with no real control over the final torque.
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they probably didnt start the threads by hand, instead they just gunned them on. what we do at sams club is start every lug by hand, and make sure it goes on about 4 or 5 threads. then we gun them on with torque sticks. the torque stick we use for a 21mm lug nut is supposed to stop at 80 ft-lbs, but i know that it goes over because when we torque them with the regular torque stick by hand, it clicks instantly. it does stop, however, around 90, because when we get vehicles that need 100 ft-lbs the lugs do need a bit more snugging before the torque wrench clicks.
#17
Originally Posted by L33T35T 4Runner
they probably didnt start the threads by hand, instead they just gunned them on. what we do at sams club is start every lug by hand, and make sure it goes on about 4 or 5 threads. then we gun them on with torque sticks.
At least they took care of it I guess.
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ya sams is pretty damn good about paying for their mistakes. all sams are REALLY cracking down on the "10 steps to a tire install" my shop now has this HUGE poster inside our shop with the 10 steps. one of the steps specificly says "start each lug by hand"
#19
Originally Posted by L33T35T 4Runner
ya sams is pretty damn good about paying for their mistakes. all sams are REALLY cracking down on the "10 steps to a tire install" my shop now has this HUGE poster inside our shop with the 10 steps. one of the steps specificly says "start each lug by hand"
Anyway, I hope that poster goes up at all the Sam's. Good to hear that they are trying to make things better.
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Originally Posted by <96 Runner>
Anyway, I hope that poster goes up at all the Sam's. Good to hear that they are trying to make things better.
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