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https://www.bmwtechinfo.com/repair/m...es/4810080.jpg
installation:
turn tensioner against the stop slowly, then tighten the bolt and nut, tightening torque 24 Nm.
Note:
hydraulic tensioners are filled with oil, so that a removed element must always be stored standing upright. Incorrectly stored elements can normally be bled by compressing them several times.