Lug Nut Torque
Safety Car
Joined: Jun 2002
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From: Buckeye, AZ
St. Jude Donor '12-'13
Team Owner
Joined: Oct 2004
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Correct, it's 140 ft. lbs. which would be 189.8 Newton meters.
https://www.omnicalculator.com/conversion/nm-to-ft-lb
https://www.omnicalculator.com/conversion/nm-to-ft-lb
Team Owner
Joined: Oct 2004
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Racer
Joined: Mar 2020
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From: Broadview Hts, OH
https://www.chevymanuals.org/2022-ch...owners-manual/
I have been corrected. Wow they jacked that number!
I have been corrected. Wow they jacked that number!
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Verdad Gallardo
Pro
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The torque spec is the required force to overcome the systems friction. If the angle of the seat or thread diameter, etc has changed then the spec will change to net the same clamping force. If better materials or larger fasteners are used the engineers may increase the spec to increase the clamping force.
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From: Missouri City, TX
Melting Slicks
Joined: May 2021
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I just took my wheels off to ceramic coat them with C5 Gtechniq. Apparently the last person to work on my wheels (the Chev dealer) thought that using an impact set to 200 ft lbs was a good idea!
I had to use an impact to get two wheels off and by the time the lug nuts started to budge they were already quite hot.
When I go back, I will have to talk with the service manager.
I had to use an impact to get two wheels off and by the time the lug nuts started to budge they were already quite hot.
When I go back, I will have to talk with the service manager.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,010
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From: NE South Carolina
Being Chair of our Tech Societies SI Practices Committee (was Metric now System Intenational) could not let it pass without being exact! 140 Newton Meters is only 103 ft-lbs. Spec is 140 ft-lbs. That is 190 Newton Meters (Nm) rounded to the proper (not excessive) signific figures as intended! By the way N is capitalized because it is a person's name; the guy with the apple falling from a tree (like W for electric power named for James Watt!) 
Last edited by JerryU; Jul 10, 2023 at 06:32 PM.
Race Director
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From: Missouri City, TX
Team Owner
Joined: Oct 2004
Posts: 25,583
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Being Chair of our Tech Societies SI Practices Committee (was Metric now System Intenational) could not let it pass without being exact! 140 Newton Meters is only 103 ft-lbs. Spec is 140 ft-lbs. That is 190 Newton Meters (Nm) rounded to the proper (not excessive) signific figures as intended! By the way N is capitalized because it is a person's name; the guy with the apple falling from a tree (like W for electric power named for James Watt!)
Race Director
Joined: Sep 2016
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https://www.chevymanuals.org/2022-ch...owners-manual/
I have been corrected. Wow they jacked that number!
I have been corrected. Wow they jacked that number!
Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,213
Being Chair of our Tech Societies SI Practices Committee (was Metric now System Intenational) could not let it pass without being exact! 140 Newton Meters is only 103 ft-lbs. Spec is 140 ft-lbs. That is 190 Newton Meters (Nm) rounded to the proper (not excessive) signific figures as intended! By the way N is capitalized because it is a person's name; the guy with the apple falling from a tree (like W for electric power named for James Watt!)
Race Director
Joined: Aug 2016
Posts: 12,812
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From: Garden Valley CA
You can find a place that will let you use their calibration meter or send it in for calibration. You can do it yourself by clamping the socket drive in a bench vise with the handle horizontal and hang a known weight off the middle of the grip. Torque is the distance from the middle of the socket drive to where the weight is hung times the weight. Use a weight that gets you close to the torque value that you want to verify.
Burning Brakes
Joined: Aug 2005
Posts: 1,006
Likes: 157
From: Springfield MO
Apparently the last person to work on my wheels (the Chev dealer) thought that using an impact set to 200 ft lbs was a good idea!
I had to use an impact to get two wheels off and by the time the lug nuts started to budge they were already quite hot.
When I go back, I will have to talk with the service manager.
I had to use an impact to get two wheels off and by the time the lug nuts started to budge they were already quite hot.
When I go back, I will have to talk with the service manager.