1994-2002 [Subscribe to Daily Digest] |
 | [Main NG900 & OG93 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Put your torque energy into your bodywork concerns Posted by Sondeen [Email]  (#796) [Profile/Gallery]
(more from Sondeen) on Thu, 7 Jul 2016 20:10:00
In Reply to: Ims, they told me there's only tow in that can be done, bender   [Profile/Gallery]
, Thu, 7 Jul 2016 08:53:22
Members do not see ads below this line. - Help Keep This Site Online - Signup
|
My advice, and I mean this in the best possible way, is not to bring up your wheel torque on the ground procedure concerns with the shop, as they will think you are a little nutty, and then they might dismiss your concerns about the body damage. Let me explain.
I agree that it is completely unacceptable to end up with dented and scratched bodywork after the car is put on a lift. That is just not acceptable work practice.
As far as the wheels are concerned, I can follow your thought process as an amateur physicist: the weight of the car on the wheel, and tire, while the tire touching the ground results in a frictional force resisting the force of the tightened bolts clamping the wheel to the hub. The peice you are missing is the relative stiffness (flexibility) between the various parts in the system. Consider that the tire is, off the top of my head, 100 to 1000 times more flexible than the wheel, lug nuts, brake rotor, hub. When the lug bolts are tightened, they pull the wheel into the hub with thousands of pounds of force. Any frictional resistance caused by the tire on the ground is not consequential because the tire just flexes. The amount of force required to flex the tire is insignificant as compared to the total force which clamps the wheel to the hub. Further, consider that if torquing the bolt on the ground verse on the lift was important, you would find warnings in the owners manual. The critical thing is the lug bolts are actually torqued to the proper spec, and you are smart because you are keeping on top of that.
, Mon, 4 Jul 2016 09:13:30, Tue, 5 Jul 2016 12:22:56, Thu, 7 Jul 2016 08:53:22, Thu, 7 Jul 2016 20:10:00 <-- Viewing This Message, Thu, 7 Jul 2016 21:08:31, Sat, 9 Jul 2016 20:38:49, Sat, 9 Jul 2016 20:55:09, Tue, 12 Jul 2016 13:47:13, Fri, 15 Jul 2016 16:35:12
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
