Hey guys, does anyone know how to tighten the valve tappets on an M103 (300e)? I thought there would just be a tightening nut on the top but there isn't it's just covered with a solid piece. I think mine are loose... I'm getting a lot of racket from under the valve cover whenever it's idling but not while driving (above 1100rpms or so). It's not a deep knock like a bearing, and yet not a super light tapping, kinda inbetween the two.

If anyone could help me on this I would really appreciate it!!

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-Kevin