Quote:
Originally Posted by lo_jack
Could one not just use some M10x55 9.8 grade bolts and call it a day? Those are likely still cheaper than replacement non-stocked BMW tty bolts.
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No, the supplied bolt grade is 10.9. Using a 9.8 grade bolt is 15% weaker...
12.9 would be the way to go in that direction. Won't have the TTY properties but has a higher tensile strength which will increase its high cycle fatigue life. New torque spec would be 62 lbs-ft for a 12.9 grade M10x1.5.