A6 Quattro Sedan V6-3.0L (AVK) (2002)
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Remove central bolt -1- for crankshaft toothed belt gear-2-.
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Remove toothed belt gear and diamond disc -3-.
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Unbolt eccentric roller-3-, tensioning lever -2- with tensioning roller and tensioner -1-.
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Unscrew locking bolt from adjustment hole -3-.
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Press chain tensioner -1- in direction of arrow until a drill bit => 3 mm -2- can be slid into the alignment hole of sealing flange and chain
tensioner.