Audi A8 2003 Workshop Manual page 270

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
– Unscrew bolts -arrows- and remove heat shield from exhaust
manifold.
– Unbolt coolant line -1- from turbocharger and detach coolant
hose -3- from coolant pipe.
– Unscrew oil supply line -2- from turbocharger.
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Rep. gr.21 - Turbocharging/supercharging