Audi A8 2003 Workshop Manual page 127

8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
– Remove bolts -1- and -2-.
– Release clamp -arrow- and detach toothed belt cover (top
section).
– Unscrew bolt -arrow- for tensioning roller.
– Take off tensioning roller and toothed belt for high-pressure
pump.
– Use counterhold tool - T10172- with -T10172/2- to loosen bolt
for toothed belt drive sprocket.
– Remove bolt and take off toothed belt drive sprocket.
– Remove bolts -1 ... 4- and detach timing chain cover (left-side).
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Audi A8 2003 ➤
121
1. Chain drive