Quote:
Originally Posted by Tt3Sheppard
Does it help at all if anti seize is used?
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Depends on why the studs are failing.
I'm of the opinion that most of the studs are failing (the stripped ones anyway) because of debris getting into the threads and people just muscle through the resistance deforming and weakening the threads. If you're using anti-seize to prevent the lug and stud from grinding and creating little metal shavings you might get some extra life out of them. If you let the anti-seize become a dirt magnet and don't keep the studs clean you'll accelerate the wear.
As mentioned above, anti-seize means that if you torque a lubricated bolt vs. an un-lubricated bolt to the same value you will put more force and stress on the lubricated bolt. Less friction in the threads = more force being applied to tighten it down.
There is endless debate on this, and I've never been arsed enough to care, the basic and intuitive answer is that yes, you should torque to a lower value. But practically speaking, torquing lugs in your driveway you'll almost never hit precisely 89 ft-lbs. Auto manufacturers know this, and this is one of those areas where the proper precautions have almost assuredly been made.
Give it a google:
https://www.google.com/webhp?sourcei...0bolt%20torque
This one looked good to me, the linked chart roughly gives us that ~90 ft-lbs dry = ~70 ft-lbs lubed, I wouldn't trust it though.
http://www.busconversions.com/bbs/in...?topic=15160.0
Yup, Subaru decided to save themselves a couple bucks per stud and they won't last forever for the guys who swap wheels two or three times per month. $1/stud * 5 * 4 * 200,000 = $4 million, I certainly don't blame them.
Have there been many cases of studs snapping on track? If there are I missed them. Like with every other affordable car, the 86 is built 'well enough'. Most of the studs fail on track because they see extreme heat cycles that the average commuter car will never see.
tl;dr keep it simple, keep the studs clean and dry
I lubed up my ARP+Al lugs like above, it was ok, didn't make me feel any better about it, I'm going to let it dry out and flake away and just do my best to keep the studs clean this time. I torqued to 89 ft-lbs because I'm acting on faith that all the important margins of safety have been calculated and it doesn't matter if I torque it to 70 or 110 ft-lbs.