A8 Quattro Sedan V8-4.2L (BFM) (2005)
Timing Chain: Service and Repair
Oil Pump Chain Drive
Removing
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Remove the toothed belt. Refer to => [ Toothed Belt ] See: Timing Belt/Service and Repair/Removal and Replacement/Toothed Belt.
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Remove the front sealing flange. Refer to => [ Front Sealing Flange ] See: Cylinder Block Assembly/Front Engine Plate/Service and Repair.
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Remove the oil baffle bolts - arrows - and baffle.
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Secure the chain tensioner for the oil pump drive chain using an angled piece of wire - 2 -.
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Remove the oil pump sprocket bolt - 1 - and remove the sprocket from the oil pump.
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Remove the crankshaft oil pump drive sprocket with the chain.
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If necessary, remove the chain tensioner from the oil pump.
Installing
Installation is performed in the reverse order of removal, noting the following:
‹› Note the installed position of the chain sprockets. The sides with the marks point toward the front.
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Install the front sealing flange. Refer to => [ Front Sealing Flange ] See: Cylinder Block Assembly/Front Engine Plate/Service and Repair.
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Install the toothed belt (adjust timing). Refer to => [ Toothed Belt ] See: Timing Belt/Service and Repair/Removal and Replacement/Toothed Belt.