A8L Quattro Sedan W12-6.0L (BSB) (2005)
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Disconnect coolant hose - arrow - at right on engine.
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Carefully pull the engine cover at the rear and middle upward and off - arrows 1 -.
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Then, pull the engine cover forward and off from intake manifold - arrows 2 -.
‹› Before removing ribbed belt, mark the turning direction on it with chalk or a felt tip pen. A reversed direction of rotation can cause damage to the
belt under operating conditions.
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To relieve tension on ribbed belt, pivot tensioner in direction of - arrow -, using a 30 mm box-end wrench.