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Old 01-04-2022, 09:47 PM
2004bmwx53i 2004bmwx53i is offline
Join Date: Feb 2019
Location: Ontario, Canada
Posts: 77
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Originally Posted by andrewwynn View Post
I'm not even sure what BMW means by microencapsulated but I think it's a special treatment that distresses the metal "one time" to lock it. These bolts aren't.

I use an app called iEngineer to look up bolt stress/yield etc.

I think those bolts are M12 front axle maybe M10 back.

Over 5 tons of force at normal torque.

The spec torque for 10.9 M12 is 122 Nm. That is 75% of yield 160 ish should be yield hence "nowhere near". You can stress a steel bolt effectively ∞ times if below 75% of yield. It acts just like a spring.

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