For those who adjust their own valves, use a closed-end 10-mm wrench.
The open end supplied in the tool kit or any open-end wrench can slip
and round off the nuts. It is possible to overtighten and snap the
nut/bolt combination, so you might want to pay your BMW dealer $.80 for
a spare bolt and nut, just in case.
Author: Delph R. Wilson
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