torque for c5 lug nuts?
Drifting
Joined: Sep 2002
Posts: 1,614
Likes: 7
From: South Florida
Re: torque for c5 lug nuts? (ydeer)
Not to split hairs, but an engineer for the C5 told me 100 ft-lbs. 30-60-90-100 in a star pattern. I don't think it matters. Tightening it sequentially will uniformelly seat the wheel.
Team Owner
Joined: Feb 2000
Posts: 32,545
Likes: 2
From: Lithia FL
Cruise-In II & IV Veteran
CI VI Drag Champ!
Re: torque for c5 lug nuts?
I do three steps. Spin them snug with the lug wrench. Hand tight with torque wrench and then 100 lb with torque wrench.
My wheels are off the car often swapping from street to drags to street and back.
My wheels are off the car often swapping from street to drags to street and back.
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Burning Brakes
Joined: Jul 2001
Posts: 843
Likes: 2
From: DFW Tx
Re: torque for c5 lug nuts? (ydeer)
Also after you drive the car for about 10 to 20 miles, retorque the lugs again. This is recommended for non steel wheels.
I have noticed that my lugs "settle" and have to be redone.
Some will turn and some won't. And I know I did it right the first time. I go over each lug at least 2 times sometimes 3 at 100 lbs.
I have noticed that my lugs "settle" and have to be redone.
Some will turn and some won't. And I know I did it right the first time. I go over each lug at least 2 times sometimes 3 at 100 lbs.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
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From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: torque for c5 lug nuts? (ydeer)
When I toured the assembly plant, I could have sworn they put the wheels on then use their calibrated pneumatic impact driver to tighten all of the lugnuts in one step, theres none of this 30 60 90 100 stuff. but whatever makes you comfortable :p:
Melting Slicks
Joined: Jul 2000
Posts: 2,521
Likes: 3
From: Gilbert, AZ, USA
Re: torque for c5 lug nuts? (runamuk)
When I toured the assembly plant, I could have sworn they put the wheels on then use their calibrated pneumatic impact driver to tighten all of the lugnuts in one step, theres none of this 30 60 90 100 stuff. but whatever makes you comfortable :p:
There's a reason why people who just drive their cars off the lot sometimes get warped rotors, and people who race and often swap wheels, who take the effort to use a torque wrench and evenly torque in a stepped pattern, have never experienced warped rotors.
I go as far as to take the torque wrench with me if any car visits the dealer and they take the wheel off, so I can back off the lugnuts and retorque them evenly to my values as soon as I get the car back, even before I drive it.
Sam
Burning Brakes
Joined: Jan 2002
Posts: 1,147
Likes: 1
From: Geismar LA
Re: torque for c5 lug nuts? (ydeer)
what about lubrication. this can make a difference, sometimes a big difference in compressive force (wheel against the hub). I would think a light lubrication is necessary to get even torque and force.
Tech Contributor
Joined: Oct 1999
Posts: 41,037
Likes: 9,801
From: Charlotte, NC (formerly Endicott, NY)
Re: torque for c5 lug nuts? (Rippied Z06)
Spec is 100 ft lbs. Anything less you are taking chances. Lubricant screws up the torque reading and you can't adjust for it by dropping 20 lbs since you really have no idea how much to drop.
I change wheels front and rear many times during the racing season. I hold the wheel against the hub with my knee to make sure it is seated properly and then use the air wrench in a star pattern until each lug just hits the wheel. After all the lugs are this tight I go back and use the torque wrench to take them t0 100. Have never warped a rotor in 5 years of owing my C5 and in the 10 years I owned my C4.
Bill
Bill
I change wheels front and rear many times during the racing season. I hold the wheel against the hub with my knee to make sure it is seated properly and then use the air wrench in a star pattern until each lug just hits the wheel. After all the lugs are this tight I go back and use the torque wrench to take them t0 100. Have never warped a rotor in 5 years of owing my C5 and in the 10 years I owned my C4.
Bill
Bill
Burning Brakes
Joined: Apr 2002
Posts: 842
Likes: 3
From: Las Vegas Nevada
Re: torque for c5 lug nuts? (ydeer)
According to the C5 service manual:
A torque wrench must be used to ensure that wheel nuts are tightened to specification. NEVER USE LUBRICANTS OR PENETRATING FLUIDS ON WHEEL STUD, NUTS, OR MOUNTING SURFACES, AS THIS CAN RAISE THE ACTUAL TORQUE ON THE NUT WITHOUT A CORRESPONDING TORQUE READING ON THE TORQUE WRENCH..... Failure to follow these instructions could result in wheel, nut, and/or stud damage.
IMPORTANT: Tighten the nuts evenly and alternatively in order to avoid excessive runout.
Tighten the nuts in a criss/cross patern to 14 N.m (100 lb ft).
As far as rotor warping?? :confused: Please read this:
http://www.stoptech.com/whitepaper/warped_rotors_myth.htm
A torque wrench must be used to ensure that wheel nuts are tightened to specification. NEVER USE LUBRICANTS OR PENETRATING FLUIDS ON WHEEL STUD, NUTS, OR MOUNTING SURFACES, AS THIS CAN RAISE THE ACTUAL TORQUE ON THE NUT WITHOUT A CORRESPONDING TORQUE READING ON THE TORQUE WRENCH..... Failure to follow these instructions could result in wheel, nut, and/or stud damage.
IMPORTANT: Tighten the nuts evenly and alternatively in order to avoid excessive runout.
Tighten the nuts in a criss/cross patern to 14 N.m (100 lb ft).
As far as rotor warping?? :confused: Please read this:
http://www.stoptech.com/whitepaper/warped_rotors_myth.htm
