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Old 07-19-2007, 01:58 PM   #1
bcmaxx
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Default Subaru wheel studs problems???

Just wondering if anyone out there has had any problems with wheel studs?? I have seen them snap,stretch and back-off . There seems to be a high frequency of these problems and not model specific either. I have noticed that the part number for the stud has been superceeded more that a few times (from 28055aa000 to 28055aa001 to 28055aa002 and most recently 28015aa003). Does subaru know something we don't??
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Old 07-19-2007, 02:13 PM   #2
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I would say that more than likely its "user error"...I have watched many a person WAAAAY over tighten their lugnuts...the torque spec is only ~70 ft lbs.
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Old 07-19-2007, 02:19 PM   #3
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I can rule out user error in many of cases, three techs with calibrated torque wrenches , and we torque before and after road testing.
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Old 07-19-2007, 02:32 PM   #4
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I've autocrossed three of my Subarus in the past, that means lots of wheel swapping. Never had a problem with studs.
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Old 07-19-2007, 02:56 PM   #5
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I've seen non-subaru shops **** up subaru studs, but not the dealers.
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Old 07-19-2007, 06:40 PM   #6
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7yrs of AutoX in the RS, 4 of them swapping wheels and I have never had a stud problem. ...never even replaced one. Swap the winter wheels back and forth on the STi as well as normal maintenence and the such; never replaced a stud in >4yrs.
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Old 07-19-2007, 06:55 PM   #7
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I've been working on cars "shadetree style" for easily half my life, and have been doing it professionally for the past 5, almost 6 years, and the only times I've ever had a stud snap was when the lugnut was cross-threaded during a previous installation. That's why I always start the lugnuts by hand before I use my impact gun with a torque extension to tighten them down. I've never had a stud break that I installed a lugnut on.
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Old 07-19-2007, 07:01 PM   #8
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i had 2 snap on me on my EARLY 02 WRX. Not sure if that counts.
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Old 07-19-2007, 11:44 PM   #9
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Yes, it is a problem.

I've replaced over a dozen myself. A good friend of mine (RenMaxi on this board) has replaced over half a dozen I believe.

Many times, it is user error. But I've always been very careful with them (never overtorqued them, threaded them by hand first before impacting them, etc.).

As far as I'm concerned, Subaru's drivetrain sucks past the CV axles. Their wheel bearings suck, their wheelstuds suck.
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Old 07-20-2007, 12:13 AM   #10
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Why would you post this in New & Rumors? Doesn't anyone read the effen forum titles anymore????????????
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Old 07-20-2007, 10:40 AM   #11
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i think because there were new part numbers for some of these parts. thats kinda news.
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Old 07-20-2007, 10:53 AM   #12
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20 years on the track and never a stud problem because of the stud. I had user-error issues on my wife's outback. Put on steel winter wheels and used the closed end nuts intended for the alloys. They bottomed out on the ends and I kept re-torqueing them and stripped a couple. My fault. Don't use an impact gun to even get the nuts started. Also, I find that using a thread chaser occationally on both the nuts and studs keeps them in good shape (chasers are slightly different from tap/die as they don't expect to have to cut new threads....I've got both types).

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Old 07-20-2007, 10:55 AM   #13
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Never had to replace one on my (wrx) Rally car....
and those wheels are on and off of the car 10 times a weekend during a race

The only time I ever had to replace them (on my Legacy)
is when I did not torque the wheel down properly.


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Old 07-20-2007, 11:20 AM   #14
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Quote:
Originally Posted by Chin View Post
7yrs of AutoX in the RS, 4 of them swapping wheels and I have never had a stud problem. ...never even replaced one. Swap the winter wheels back and forth on the STi as well as normal maintenence and the such; never replaced a stud in >4yrs.
....nor have I ever had to replace a wheel bearing...
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Old 07-20-2007, 11:37 AM   #15
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Never had a problem with studs on any car with the exception of one local's EVO that got one crossthreaded.

As for wheel bearings - I'm on number 4 on the front left of the STi. I went with the very slightly beefier nissan bearing the last time, and it seems to be doing ok, but I still get a good bit of knockback. The 6Gun prototype 5x100 conversion kit I have here with the 05+ bearing should help that out once I get them on the car.
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Old 07-20-2007, 01:00 PM   #16
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I think it's significant that the people who have problems have LOTS of problems with studs and those that don't have problems don't have ANY problems. It points directly to a user issue. There doesn't seem to be a middle ground which is what you'd expect if it was an inherent problem in the design.
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Old 07-20-2007, 01:07 PM   #17
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Quote:
Originally Posted by MasterKwan View Post
I think it's significant that the people who have problems have LOTS of problems with studs and those that don't have problems don't have ANY problems. It points directly to a user issue. There doesn't seem to be a middle ground which is what you'd expect if it was an inherent problem in the design.
+1

Its obvious some people here are just not doing it right
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Old 07-20-2007, 06:49 PM   #18
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Quote:
Originally Posted by bcmaxx View Post
Just wondering if anyone out there has had any problems with wheel studs?? I have seen them snap,stretch and back-off . There seems to be a high frequency of these problems and not model specific either. I have noticed that the part number for the stud has been superceeded more that a few times (from 28055aa000 to 28055aa001 to 28055aa002 and most recently 28015aa003). Does subaru know something we don't??
of all the Subaru's we see, I have yet to see a single one.
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Old 07-20-2007, 07:27 PM   #19
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Quote:
Originally Posted by Turn in Concepts View Post
The 6Gun prototype 5x100 conversion kit I have here with the 05+ bearing should help that out once I get them on the car.
Sorry just had to tease you.

BTW the other kits that have gone out are working beautifully; with the exception of the brake dust plates not fitting the 05 knuckles. I believe that they are only $30 so I am going to look into including them with the kit for the 5% of the folks out there that run them.
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Old 07-21-2007, 01:02 AM   #20
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Quote:
Originally Posted by MasterKwan View Post
I think it's significant that the people who have problems have LOTS of problems with studs and those that don't have problems don't have ANY problems. It points directly to a user issue. There doesn't seem to be a middle ground which is what you'd expect if it was an inherent problem in the design.
Significant does not mean conclusive.
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Old 07-21-2007, 11:56 AM   #21
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You asked if there's a wheel stud problem. The vast majority of responders haven't broken a single wheel stud even though in many cases they swap wheels far more often then most people.

I think you can conclude that for the majority of people who responded, there is no issue with wheel studs.
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Old 07-21-2007, 12:16 PM   #22
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In my limited experience, the studs seem strong enough. I'm an over-tightener by nature, and I'm willing to bet that I routinely apply well over 100 ft-lbs to the lug nuts . I also swap wheels all the time. I've never broken a stud, on this car or any other. If I'm not breaking them, I wonder just how much force some people are using. LOL.
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Old 07-21-2007, 12:22 PM   #23
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I would like to know if the OP has been using any type of grease or anti-seize on the studs????

This increases the torque on the lugs by 20-50%

I've never snapped a lug stud on my 99'rs after countless installs... I HAVE stretched the studs AND broke out the tops of the lugs... using grease..
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Old 07-21-2007, 01:49 PM   #24
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Honda in their shop manual says specifically not to use Anti-sieze on the threads for that very reason. I typically go to 80 ft/lbs because that's the required minimum torque at most track events.
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Old 07-23-2007, 02:09 PM   #25
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anti-sieze does not increase the TORQUE on the stud.

Anti-sieze does increase the tension in the stud at a given torque.
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