A8L V8-4.2L (BFM) (2004)
When installing a new drive chain
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Distance between notches -A- and -B- on camshafts must be 16 rollers on chain. Illustration shows exact positions of 1st and 16th rollers on
sprockets.
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Notch -B- is offset slightly toward inside in relation to chain roller -16-.
Continued
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Insert camshaft adjuster into chain (2nd technician required).
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Position camshafts together with chain and camshaft adjuster on cylinder head.
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Oil running surfaces of both camshafts.
Note: Dowel sleeves for bearing caps and camshaft adjuster must be installed in cylinder head.
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Install bearing caps 3, 5 and 7 in accordance with identification markings.
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Tighten bearing caps 3, 5 and 7 of intake and exhaust camshafts in stages and in diagonal sequence.
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Tighten mountings of camshaft adjuster -10-.
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Remove holder for chain tensioner 3366.
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Check correct setting of camshafts: