S4 V8-4.2L (BHF) (2004)
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Note:
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Camshaft timing chain remains on engine.
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Also, if only one of the two cylinder heads is removed, bolts for camshaft gears must be loosened at both cylinder heads.
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Push glide track of chain tensioner for right timing chain in direction of - arrow - and pull off chain tensioner using a 3.3 mm diameter drill - item
1 -.
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Remove bolts - 1 - and - 2 - for camshaft chain sprocket or camshaft adjuster using multipoint socket T10035.
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Remove camshaft chain sprocket and camshaft adjuster.
Note:
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Camshaft timing chain remains on engine.
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Also, if only one of the two cylinder heads is removed, bolts for camshaft gears must be loosened at both cylinder heads.
Installing
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Secure crankshaft in TDC position using crankshaft holder 3242.
Note:
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Always replace bolts that are tightened to torque as well as O-rings and gaskets.
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When turning camshaft, crankshaft must not be at TDC for any cylinder. Valves and/or pistons may be damaged.
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During installation, reinstall all cable ties at the same locations.
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Rotate inner part and outer part of both camshaft adjusters against each other up to lock position - arrows -.
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Inner part and outer part must not be able to be against each other in lock position (slight play can still be felt).
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Check whether camshafts of both cylinder heads stand in TDC position.