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When I was having a problem with my lug bolts coming loose he told me to put a bit of antiseize on the wheel bolt seats; totally counterintuitive (to me) but I did it and no problems at all since. Wise man, he is....
When I was having a problem with my lug bolts coming loose he told me to put a bit of antiseize on the wheel bolt seats; totally counterintuitive (to me) but I did it and no problems at all since. Wise man, he is....
If you did not adjust the torque setting of your wrench, all the anti-seize did was increase the effective torque you were using. In other words, you could have reach the same result by using more torque.
If you did not adjust the torque setting of your wrench, all the anti-seize did was increase the effective torque you were using. In other words, you could have reach the same result by using more torque.
Not to the same effective amount. If anything, the grease on the bolt seats would make it easier for the nut to come loose, not harder. As there would be less friction keeping it from loosening. So, the clamping load would have to increase to keep it in place. This isn't magic.
Not to the same effective amount. If anything, the grease on the bolt seats would make it easier for the nut to come loose, not harder. As there would be less friction keeping it from loosening. So, the clamping load would have to increase to keep it in place. This isn't magic.
Here's a snip from my manual (997.1) below. Note how it says to lubricate the threads, not the "head" of the bolt. Proper installation and torque of any mechanical connection bolt always involves lubricating the threads. If you do not lube the threads, you cannot be sure what the preload of the bolt will be, and if the torque spec is based on lubrication (like the Porsche manual), then you will definitely not achieve the intended preload. This can be dangerous especially if you are driving on the track, where the bolts are exposed to cyclic loading due to cornering forces. Without achieving the defined preload, you risk exposing the bolts to metal fatigue due to the stress amplitude changes in the bolt. Lubrication of the threads ensures you reach a consistent preload in the bolt, and does not precipitate loosening. It is the friction between the head of the bolt and the clamped material that prevents loosening, not the threads - that is why Porsche says not to lubricate the head of the bolt. I hope I am not coming off as condescending, but when I saw this I wanted to clear it up because it's an important safety issue.
10-25-2022, 01:19 PM
Flugs (nuts)
