I'm having a set of magnesiums powdercoated right now and plan on torquing to 100 ft. lbs. Better tight than loose. Don't worry the rim can certainly handle 100 ft. lbs.
Magnesium wheel nuts - torque?
Thread Starter
Racer
Joined: Jul 2004
Posts: 274
Likes: 0
From: Bergerac Dordogne
Magnesium wheel nuts - torque?
I wonder if anyone knows what torque the wheel nuts should be for magnesium wheels? I have just fitted a set of powerslot rotors and the manual says that the wheel nut torque should be 100 ft/lbs.
As the mag wheels are held on via steel inserts that do not locate directly onto the rotors, I was wondering whether 100 ft/lbs was too much. Certainly they were only on at around 70ft/lbs to begin with.
But as the wheels have been removed several times by dealers and the caliper mounting bolts were nowhere near the recommended torque settings I am at a bit of a loss on this one.
Thanks in advance
As the mag wheels are held on via steel inserts that do not locate directly onto the rotors, I was wondering whether 100 ft/lbs was too much. Certainly they were only on at around 70ft/lbs to begin with.
But as the wheels have been removed several times by dealers and the caliper mounting bolts were nowhere near the recommended torque settings I am at a bit of a loss on this one.
Thanks in advance
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Originally Posted by Cochemarman
Aw come on - someone must know!
Last edited by 87bob; Oct 5, 2005 at 07:41 AM.
Drifting
Joined: Dec 2003
Posts: 1,895
Likes: 84
From: Darien IL
It should be in the owners manual.
It's usually 100 for aluminum and 80 for steel. I suspect it is the difference in the friction between the cone part of the nut and the surface it bears against on the wheel.
It's usually 100 for aluminum and 80 for steel. I suspect it is the difference in the friction between the cone part of the nut and the surface it bears against on the wheel.
Thread Starter
Racer
Joined: Jul 2004
Posts: 274
Likes: 0
From: Bergerac Dordogne
Thanks chaps for the advice. The only thing is that on the mag wheels there is no point of contact directly between the nut cone and the rotor - there is a 2mm or so gap, about washer sized behind the steel insert and the hub. There is no sign that any washers have ever been there.
I have looked in the owners manual which is in German (for it is from Germany that I got the car) and German is not one of my strong points . . but there is definitely no mention of wheel nut torque anywhere.
So in the absence of any information to the contrary, I'll stick with 100ft/lbs.
TTFN
I have looked in the owners manual which is in German (for it is from Germany that I got the car) and German is not one of my strong points . . but there is definitely no mention of wheel nut torque anywhere.
So in the absence of any information to the contrary, I'll stick with 100ft/lbs.
TTFN
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Burning Brakes
Joined: Dec 2005
Posts: 998
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From: Indianapolis IN
I am getting my powdercoated set put on tomorrow with the tires being switched over off my other rims. I honestly never looked at the bag of lugnuts I got with the rims, they are different then the others? I know they have plastic caps to go over them.
I have the rubber rings for behind the rim, is everyone still using this? The rubber sections that were around where the studs go through the rim are gone, gone when the powdercoating was done.
I have the rubber rings for behind the rim, is everyone still using this? The rubber sections that were around where the studs go through the rim are gone, gone when the powdercoating was done.
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
I am getting my powdercoated set put on tomorrow with the tires being switched over off my other rims. I honestly never looked at the bag of lugnuts I got with the rims, they are different then the others? I know they have plastic caps to go over them.
I have the rubber rings for behind the rim, is everyone still using this? The rubber sections that were around where the studs go through the rim are gone, gone when the powdercoating was done.
I have the rubber rings for behind the rim, is everyone still using this? The rubber sections that were around where the studs go through the rim are gone, gone when the powdercoating was done.
Put these in place before mounting the wheels they are there to prevent water from entering behind the wheel and causing galvanic corrosion between the rotor and the wheel.
There are no seals on the studs.
Wheel nut torque is 100 lbft same as the alumnum wheels.
Race Director
Joined: Jan 2006
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From: Not on either liberal coast.
