A8 Quattro Sedan V8-4.2L (BGK) (2006)
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Alternating in diagonal sequence, loosen the bearing caps 3, 5 and 7 for the intake and exhaust camshafts and remove.
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Remove both camshafts with the camshaft adjuster.
Installing
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Replace the bolts for the camshaft bearing caps and camshaft adjuster.
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Replace the half round sealing plugs.
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Remove the sealant residue from the cylinder head and bearing caps.
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Replace the rubber/metal gasket and apply a thin bead of sealant on the hatched surface.
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Place the drive chain onto the camshaft gears as follows:
Using the Old Drive Chain
‹› Align the colored mark - arrows -.
Using a New Drive Chain
‹› Distance between notches - A and B - of the camshafts must be a distance of 16 rollers on the drive chain. Illustration shows where first and
sixteenth drive chain rollers must be installed on the gears.