A8 Quattro Sedan V8-4.2L (BFM) (2005)
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Remove the center toothed belt guard.
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Remove the torque support bolt - arrow - from the torque support valve (N382).
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Remove the bracket bolts - arrows - for the torque support valve.
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Using an 8 mm hex wrench, rotate the toothed belt tensioner in the - direction of the arrow - until the tensioning lever pushes the tensioning
element together far enough so that the (T40011) can be inserted into the bore of the tensioning element piston and housing.