A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
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Pull off both camshaft sprockets with special tool T40001.
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Refit both camshaft sprockets with securing plates and tighten hand-tight again.
Note: The camshaft should be just tight enough on the camshaft tapers so that they can still be turned but do not move axially.
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Fit toothed belt on all sprockets as illustrated.
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Fit camshaft clamp 3391.
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Using a hex key, turn toothed belt tensioning roller-1- clockwise 8 mm in direction of arrow until special tool T 400 11 can be removed.