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Suspect lug nuts

I've been looking through the threads but just want some reassurance.

I have taken the back wheels off of my 81 911, the lugs are featherweights! They appear to be aluminium, I've never seen anything like it. The threads saying they should be torqued to 96ft.lbs have me worried I don't have the right lugs and should have steel lug nuts?
Old 08-13-2019, 11:55 PM
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you have the correct lug nut.The are alu

Ivan
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Old 08-14-2019, 12:12 AM
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Thanks, I also checked the torque of the nuts on the front wheels and they were about 96lb.

I've never seen aluminium lugs before.
Old 08-14-2019, 02:31 AM
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Quote:
Originally Posted by TJWA View Post
Thanks, I also checked the torque of the nuts on the front wheels and they were about 96lb.

I've never seen aluminum lugs before.
The factory took that whole unsprung weight minimization stuff pretty seriously. FYI, there are Titanium ones for sale in the parts forum (not affiliated)
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Old 08-14-2019, 04:21 AM
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I too was very surprised the first time I handled an aluminum lug nut from a 911.
Old 08-14-2019, 04:42 AM
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The alloy ones are original, however you should be cautious of them. After enough torque cycles they twist fairly significantly. I would inspect them regularly and replace any that look questionable. I've seen a few that are twisted enough to look like they'd snap on the next torque cycle.
Old 08-14-2019, 07:34 PM
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I can help you out with titanium - FS:Titanium Lug Nuts & Studs v2.0
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Buy some Titanium Lug Nuts!
http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1032311-fs-titanium-lug-nuts-studs-v2-0-a.html
ig: @ti_porsche_products

Last edited by dg567; 08-15-2019 at 11:48 AM..
Old 08-15-2019, 07:50 AM
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I think mine were the originals from 1969, and although they seemed/seem in good condition, I opted for buying the titanium ones. A bit of money but a nice upgrade and I feel better about them.
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Old 08-15-2019, 08:28 AM
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Many organizations won't let you run the ally nuts on the track. Not because of strength but because it's awkward to check correct thread engagement (eg with non-standard wheels/studs/spacers) if the nut is closed.

The titanium ones (which I bought and like a lot) are open, just like the regular steel open ones many folks use for cars that visit the track and need to pass tech.
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Old 08-15-2019, 11:29 AM
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Twisted Al lug nuts are usually courtesy of a 1/2" impact gun to tighten.

BTW, use a touch of anti-seize on the threads. This prevents electrolysis between al and steel and allows removal without drama.

Sherwood
Old 08-15-2019, 11:39 AM
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These alloy nuts first appeared in 1966 on the 1967 911S. They have been in use a long time.
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Old 08-15-2019, 12:40 PM
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I took the wheels off a car that had been at another shop and noticed that the lugs were barely tight. Annoyed, I called the shop and spoke to the "tech". He said, hey, they're aluminum and should only be torqued to 40# or they'll strip out. I suggested that he check the spec book, which says 96#. Got all arrogant and wouldn't listen, oh well.
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Old 08-15-2019, 08:53 PM
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I wonder how many wheels fell off of the shops clients cars.
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Old 08-16-2019, 04:26 PM
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I spent time R&R-ing these wheels using stock nuts. I got a sense for how they feel going on. Then I made the mistake of taking my car to an auto shop (tire change, perhaps?). The nuts were on way too tight and when I went to retorque them, they felt different. They no longer go to torque spec slowly. They're too loose and then suddenly they are tight with almost no actual movement of the nut.

I'm scared of stock nuts. I like the metal ones, stud-through. If I cared how they looked, I'd take a Marks-A-Lot to them. Frankly, I think the stock ones are silly looking. And I don't trust them.
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Old 08-16-2019, 06:56 PM
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The real factory ones are high quality alloy, beware the copies. Correctly torqued, they have been used on heavy 930s on the autobahn at high speeds. They can gall after many track laps on a dedicated racer, but are fine for most track day type events.
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Old 08-17-2019, 09:11 AM
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