Rear wheel Lug studs keep breaking?!?!
Thread Starter
Melting Slicks
Joined: Jun 2010
Posts: 2,169
Likes: 1
From: Buford Georgia
Rear wheel Lug studs keep breaking?!?!
2001 coupe.
just wondering, has anyone ever had a problems with lug studs breaking?
about 8 months ago, i had three break on the right rear wheel...
then this AM i had 2 break on the rear left...
just wondering if whoever put the last wheels on maybe over tightened them? or is it because i put my foot down so much that the TQ of the car can break them?
maybe cause they are 10 years old?
Thank you!
Matt
just wondering, has anyone ever had a problems with lug studs breaking?
about 8 months ago, i had three break on the right rear wheel...
then this AM i had 2 break on the rear left...
just wondering if whoever put the last wheels on maybe over tightened them? or is it because i put my foot down so much that the TQ of the car can break them?
maybe cause they are 10 years old?
Thank you!
Matt
Thread Starter
Melting Slicks
Joined: Jun 2010
Posts: 2,169
Likes: 1
From: Buford Georgia
i have tq'd them. last time was a tire place putting on new tires..
so basiclly your saying they just over tq'd them? that simple eh?
Edit: know the rec lb for tq'ing them?
so basiclly your saying they just over tq'd them? that simple eh?
Edit: know the rec lb for tq'ing them?
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
You should really take a close look at the wheels where the surface that contacts the hub is. I have the ZR1 replica wheels from TireRack. I had to send one of the wheels back because the surface of the wheel that contacts the hub near the stud was ground off enough there was about .175” clearance when all 4 other surfaces were in contact with the hub.
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
Maybe the installer didn't remove the internal tooth oem rotor retainer clips?
There's usually one or two per wheel. Many after market wheels don't have a machined recessed area to allow for the retainers to remain in place as do the oem wheels. It's usually recommended to remove the clips. That could allow the wheel to sit off the hub slightly...
From the CCW website...
There's usually one or two per wheel. Many after market wheels don't have a machined recessed area to allow for the retainers to remain in place as do the oem wheels. It's usually recommended to remove the clips. That could allow the wheel to sit off the hub slightly...
From the CCW website...
Last edited by hotwheels57; Dec 15, 2011 at 02:54 PM.
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Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
The spec is 100 ft-lbs with dry threads. Using any kind of lube on the threads will change the required torque to achieve the same pre-load on the studs. Torquing to 100 ft-lbs with lube on the thread will be over stressing the studs.
Last edited by ZeeOSix; Dec 15, 2011 at 04:14 PM.
Safety Car
Joined: Nov 2000
Posts: 4,549
Likes: 30
From: Shenandoah Valley Virginia
As an alternative if you are OK on all the other items mentioned in previous posts. Swap out to ARP high strength studs. There has to be some reason you are snapping studs, the stock ones are more than adequate for most applications.
Team Owner
Joined: May 2001
Posts: 87,335
Likes: 1,590
From: Western NY
In 41 years of car ownership, I've never broken a lug stud.
Tech Contributor
Joined: Oct 1999
Posts: 41,043
Likes: 9,807
From: Charlotte, NC (formerly Endicott, NY)
Look for something preventing the wheel from seating properly such as a rotor retainer clip. I had a lug stud that would continuously break every two months. Same position on same wheel. Turned out there was a burr on the wheel bearing hub that prevented the wheel from seating properly. Even though I torqued the wheels properly the wheel would move some under the loads seen on the track and when I tried to remove the nut it would jam and the stud would eventually break. I hit the burr with a file and the problem went away.
Bill
Bill
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
I would say it is a spacer issue or something else.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Instructor
Joined: Feb 2003
Posts: 150
Likes: 0
From: Staten Island NY
Be sure that the angle of the taper on the lug nut matches the taper of the stud hole in the wheel. My brother once bought a set of chrome swap meet lug nuts that seemed fine. But when he had heavy load in the bed of his pickup they would loosen and snap the studs. This happened twice before we realized the cause of the problem.
Safety Car
Joined: Jun 2009
Posts: 3,888
Likes: 2
From: Frederick, Maryland
Depends on how much the impact can do. yea if you have torque limit drivers but if not you can seriously drive them on. Thats what happened to me.