A8L V8-4.2L (BFM) (2004)
Continued
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Hold camshaft adjuster in position with retainer for chain tensioner 3366.
Note: If the retainer for the chain tensioner is tightened excessively, this can damage the camshaft adjuster.
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Mark sequence and positions of all bearing caps as shown in illustration - regardless of existing identification markings.
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To mark bearing caps, clean them first and use a waterproof felt pen.
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Unscrew bolts securing camshaft adjuster-10-.
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Remove bearing cap 1.
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Remove bearing caps 2, 4, 6, 8 and 9 and place them in correct order on a clean surface.
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Loosen bearing caps 3, 5 and 7 of intake and exhaust camshafts alternately and diagonally, and remove.
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Take out both camshafts together with camshaft adjuster.
Installing
Note: Use new bolts for camshaft bearing caps and camshaft adjuster.
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Replace semi-circular sealing plug.
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Remove all remaining sealant from cylinder head and bearing caps.
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Replace rubber/metal gasket for camshaft adjuster and apply a thin coat of sealant to shaded area.
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Sealant
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Refer to Part Supplier
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Install drive chain on camshaft sprockets as follows: