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      03-31-2024, 11:07 AM   #9
chris3g
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Drives: 2023 M3 xdrive
Join Date: Jan 2012
Location: NJ

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There is a specific procedure for this. The bump stops are not meant to be used to set the hood close height, the height is set by the 2 latches on the hood and then the bump stops should be adjusted to support the hood at that height. To do this you turn the bump stops all the way down and pull up the little center nub pieces so they are fully extended. Close the hood fully which will depress the nubs down to the proper position, then open it again and screw the bump stops out until they are flush with the center nubs.

The spec for the hood height is measured in the gap at the top center of the headlights , I’d have to look it up exactly but it’s something like 4-7mm.

Once the hood height is properly set then you adjust the front bumper position to create an equal gap across the length of the hood. Lastly, there is an adjustment that raises and lowers the end points of the bumper where it meets the hood over the headlights , you can adjust the left and right independently to get the correct vertical alignment at each side.

One other tip, especially if you have already previously messed with the bumper , is to loosen the bumper adjustment bolts and pull it all the way forward before you start adjusting the hood height, so that you don’t accidentally close the hood into the bumper if the hood is set too low or the bumper was previously set too close, it’s pretty easy to do this and it will scratch the edge of the bumper.
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