Audi A8 2003 Workshop Manual page 130

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
– Place a cloth under the sump to catch escaping engine oil.
– Unscrew plug -arrow- from sump (top section).
– Screw locking pin - 3242- into bore (20 Nm); if necessary, turn
crankshaft -1- backwards and forwards slightly to fully cen‐
tralise locking pin.
– Press tensioning rail of chain tensioner for timing chain (left-
side) in direction of -arrow- and lock chain tensioner by insert‐
ing a 3.3 mm ∅ drill bit -item 1-.
– Unscrew bolt -3- securing tensioning rail and detach tension‐
ing rail.
– Unscrew bolts -1- from guide rail and -2- from camshaft
sprocket.
– Remove camshaft sprocket and guide rail.
Note
Cover chain tensioner opening with a cloth or similar to stop small
parts dropping in.
124
Rep. gr.15 - Cylinder head, valve gear
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