Torque Specs for wheel lugs
 

What are the torque specs for the wheel lugs? Is is 96 ft/lbs?

2007 Boxster S w/18" wheels.

Thanks.

You are correct.

Not to be picky, but torque is measured in lb/ft. Work is in ft/lbs.

I know, Everybody says it. Just the engineer in me trying to get back out. :)

Actually, it's ft-lb :cheers:

Ft/lb is to measure energy. Lb/ft is to measure Torque.

http://en.m.wikipedia.org/wiki/Pound-foot_(torque)?wasRedirected=true

Jesus H. Who let the engineers in?

Set your torque wrench to 96 whatever-the-eff's and you're good to go. :D

Well technically you are measuring the resistance to turning of the bolt and not the tightness of the bolt or the force of the bolt on the wheel. If you want to get really anal then is 96 lb/ft dry, lightly oiled or if you use anti seize how much do you have to change the setting to compensate.

I have seen systems that are used on wind turbines that address these issues. They have a special washer that squirts out blue goo when it is the correct torque. They are very acurate and make tightening bolts a simple process. Too bad they don't have them for lugs.

By the way I torqued my lugs to 95 ft/lbs (that is what it says on my torque wrench) today.

Damn engineers!
Torque is measured in ft-lbs... not ft per lbs (ft/lbs), I'm not sure what is a measurement of?. Or torque is in-lbs and N-m

Ref: Marks' Standard Handbook for Mechanical Engineers, Ninth Edition, McGraw-Hill Book Company. I can also reference American Machinists' Handbook - Seventh Edition (my grandfather's!) McGraw-Hill Book Company, 1940.

Thanks all. 96 xx/xx it is.

Just don't set it to 96 Nm :D

You guys should have let Jimmy Carter get the Metric system in the US. Soo much easier.

Theres a revised spec for the wheel bolts, something above 100 ft-lbs. I dont know if that spec was retroactive to all models.

Also, the threads are lubricated but the sherical cap is not.

All interesting but when was the last time you calibrated your torque wrench? :rolleyes:

I check my click wrenches against my beam wrench all the time.

When I started using a torque wrench for this, I was ashamed how far I was over torquing. Made the car feel or ride different I swear.

About a year ago. Why do you ask?

http://www.members.shaw.ca/mtharris/...20wrenches.jpg

Having said that, I now use a torque stick on my MG725. I checked it with the torque wrench the first few times but it was always so close I stopped checking.

I used to have mine checked yearly because I used them so much. I'm surprised how off they can get. I actually wore a torque wrench to the point it was no longer able to be calibrated.

For wheels I just told the techs to buy a cheap harbor freights and compared the torque value with a known good one every once in a while. No need to wear out a expensive torque wrench on lug nuts.

Fitting wheels
 

Hello I live in the UK. I have never in my life used a torque wrench on the wheels of any of my cars. I am now just on 66. The car I have now is a Boxster S 2002. The first thing I do when I buy a new car is take all the wheels off so I can copper grease the threads, then use a spider to tighten. This has been my procedure for all those years.

Say hello to warped rotors. Have you always had drum brakes?

So this ties in nicely to my thread on cleaning up the lug nuts. Would the YouTube specs be the same on my 99 with 17" wheels, with putting anti-seize on the threads?