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      01-10-2010, 05:36 PM   #4
swamp2
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Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

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Quote:
Originally Posted by VictorH View Post
Apply a very thin, sparing amount of anti-seize to the front and back side of the spacer including the centering ring of the hub (don't use a bunch) same on the lug bolts, just a little bit on a few threads, not all of the threads as it will spread on its own. Lug bolts torque to 88 ft-lbs (when dry), however, I use the same amount with anti-seize. If you are using after-market lug bolts then I would probably take a few pounds off that number, but if OEM you'll be fine at the stock value.
Quote:
Originally Posted by foosh View Post
Lubed bolts will require a much higher level of torque to reach comparable tightness, and there is no such spec for wheel bolts. If you lube the lug bolts, you run the risk of over-tightening and stressing the bolt threads, plus you have no idea how tight or loose you are torquing. A lubed lug bolt at 89 ft/lbs. will not be nearly tight enough.

89 ft/lbs. is not a great amount of force. You should never have any problem breaking free dry lug bolts at that spec, if you break them lose a bit before lifting the car.
Lots of incorrect things here guys.

1. When lug bolt threads and clean and dry you don't need and never should use lube on them. Clean the bolt and threads as required with acetone or brake cleaner and blow out/off with compressed air. Then install DRY. This does not depend on the climate you are in.

2. You should not vary the tightening torque based on the bolt manufacturer. Use a bolt that meets BMW specs and use BMW specs for torque, period.

3. Just for the sake of correctness, IF you happened to have lubricated threads the torque requirements will decrease. The goal of a torque spec is much more related to the correct tension in the fastener as opposed to some level of torque tightness. As such a lubed fastener will develop the equivalent tension to a non lubricated one at a significantly lower torque value. Dry torque values on a lubed fastener can cause yielding or failure of the base threads, fastener threads or even the fastener itself. However, a high strength steel lug bolt mating in the aluminum hat on the M3 will most likely damage the threads in the hat.
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