[vachss]

The alternator on my '07 Z4 3.0si Coupe is finally going at 150K miles. Not a particularly big job, but I'm finding conflicting info on the torques required for the 4 Aluminum mounting star bolts shown below:



Since these are AL and stretch I really don't want to overtighten. Anyone have a good torque number (I've variously heard 14 ft lb and 31 Nm and am inclined to believe the first number, but real info would be nice).

Thanks!

PS. I already asked this question, but didn't get much response, over on the Z4 portion of bimmerpost. Since I think the E90 series 330i has the same setup I figured it's worth a try cross-posting over here.

[nik89]

Sorry for the Italian Language

tightening torque 10Nm
angle tightening 180°

BMW recommends replacement of the screws

[vachss]

grazie