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-   -   Rear Wheel Stud/Wheel Hub Bolt Distress (https://www.rx8club.com/rx-8-racing-25/rear-wheel-stud-wheel-hub-bolt-distress-96588/)

TeamRX8 08-27-2006 02:23 PM

yeah, it's a great buy

GeorgeH 08-28-2006 08:45 PM


Originally Posted by CRX Millennium
Situational update: dealer replaced the rear wheel stud, due to not being able to find any clear instructions on DIY. According to the dealer, wheel bearing, brake caliper, and hub assembly all had to be removed to get one little bolt replaced. Thanks to great Mazda engineering! 2 hr labor charge ~!@$

Bought the good-quality McGard 64002 (M12x1.5) from PepBoys for $8/4-lug-nuts and anti-seize. Torn about applying anti-seize due to overwhelming recommendations from those of you who swear by the lubricant, while tons of warnings can be found against the practice. See:
NASA Stress Test
http://www.tundrasolutions.com/forum...lug-nut-studs/
ScoobyMods
http://www.scoobymods.com/forums/arc...hp/t-2884.html
TireRack
http://www.tirerack.com/tires/tirete....jsp?techid=39
MotorAge
http://www.findarticles.com/p/articl...4/ai_n15692083

One thing for sure, I will try to use air compressor to clean the stud thread and enclosed lug nuts.

I've been using anti-sieze on the RX-8 and Miata, and I won't stop using it, as long as I am swapping the wheels on a semi-weekly basis.

Theoretically, the lube reduces the amount of torque required to get the correct pre-load in the bolt. So, if you use anti-seize and use the full 108 ft-lbs specified by Mazda you are stretching the studs by a greater amount than Mazda intended and putting greater forces into the hub.

Whether or not this is a problem is hard to say. Fatigue failures are notoriously hard to predict. But it's equally hard to predict how quickly the studs will degrade due to friction & contamination in the un-lubed state. Galling can also cause failures, as already noted.

I run 90 ft-lbs with anti-sieze as a compromise. Don't know if it's right or wrong, just a guess. :dunno:

ChopsMcgraw 08-28-2006 10:18 PM

Agreed.


I worry more about galling threads than breaking the stud through over-torquing.

Speedtoys 09-21-2006 05:00 PM


Originally Posted by CRX Millennium
Is that so? The bolts sit atop of brake shield in the attached pdf. How would hammering affect the wheel bearing? If I was to cut the damaged bolt short, than backing it out should by easy. The problem is putting the new long bolt in with limited clearance space.

I think the board will benefit in a huge way, if Jason can do a DIY on the rear. The front is here in case anyone is interested: https://www.rx8club.com/series-i-do-yourself-forum-73/diy-replacing-front-wheel-studs-73670/

How would a hammer affect it?

How would hitting your average hole in the highway at 80mph with a 3000lb car on top of it affect it.

:)

RX8 JET 07-02-2007 10:29 AM


Originally Posted by ULLLOSE (Post 1484185)
I have done one of each, it is easy. Give it a wack with a hammer and it will pop out. Then use a spare nut and some washers to pull the new one in. If you rotate it to the right spot both front and rear can be done with only taking off the wheel.

Wondering whether you can remember how to get the rear studs off while not taking more than just the wheel off (certainly not the hub). I have had issues at the track. I found out how to do the fronts with only removing the tire and was surprised to read your experiences.

Please help a fellow racer with issues at the track. This experience has made me hate and fear tire changes. Right now, if there were issues at the rear, I'm done for the weekend....which is an awful feeling.

Thanks.

TeamRX8 07-02-2007 11:06 AM

anti-seize your studs, use 90-95 ft-lb torque, replace the OE nuts with a set of McGard or Gorrilla lug nuts, and pray

otherwise the rear hub will need to be disassembled

one member did manage to swap one out without disassembly by grinding down the stud heads on one side so that it could be slid out/in from behind the hub

John V 07-02-2007 12:11 PM

:uhh:

balefire 07-18-2007 05:50 PM


Originally Posted by TeamRX8 (Post 1951979)
anti-seize your studs, use 90-95 ft-lb torque, replace the OE nuts with a set of McGard or Gorrilla lug nuts, and pray

otherwise the rear hub will need to be disassembled

one member did manage to swap one out without disassembly by grinding down the stud heads on one side so that it could be slid out/in from behind the hub

Count me in for the stripped stud club. My local mechanic autox buddy helped me change out my rear stud yesterday. A HUGE PAIN. We did it w/o disassembling the rear hub, but had to:

1) Cut the disc cover
2) Filed down the stud head on one side to get past the rear knuckle
3) Used a hammer. Lightly ;)

Even after rotating the hub, cutting the disc cover, and filing the stud head, it still was a huge pain to get the stud past everything. If I had to do it over again, I would consider just disassembling the hub.

I will do everything I can to prevent this from happening again. Tommorow, I'm buying McGard lug nuts for my autox wheels and some anti seize...

I already picked up a fresh set of Dorman lug nuts to replace my crappy street lug nuts. Any experiences w/ Dorman lugs? Should I go online and get a real set? The Dormans were the only set the local store carried that fit my silly heavy bling SSWs.

TeamRX8 07-18-2007 06:05 PM

cutting the disc is not what most people want to do, but it would prevent having to remove the hub

get the Gorilla nuts with the small 17mm hex if you can, these are what Tirerack provides with SSR wheels, they are great and relatively light, lets almost any socket fit in the tightest wheel holes

balefire 07-18-2007 06:20 PM


Originally Posted by TeamRX8 (Post 1976599)
get the Gorilla nuts with the small 17mm hex if you can, these are what Tirerack provides with SSR wheels, they are great and relatively light, lets almost any socket fit in the tightest wheel holes

So after some digging, I found an old set of kyokugens in the garage, but the key/spline is stripped (common apparently). Is this set worth replacing the spline and using for my autox or street wheels? The lug nuts look like they are still in good condition.

TeamRX8 07-18-2007 06:22 PM

I hate spline lug nuts ...

TeamRX8 07-18-2007 06:30 PM

http://www.gorilla-auto.com/products...image=4981.jpg


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