Audi A8 2003 Workshop Manual page 139

8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
– Wrap insulating tape around tip and shaft of 3.3 mm ∅ drill bit
to avoid cuts.
– 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-.
– Mark running direction of timing chain (left-side) with paint.
– Remove adjustment pin - T40060- from both camshafts.
– 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, guide rail and timing chain (left-
side).
– Press tensioning rail of chain tensioner for timing chain (right-
side) in direction of -arrow- and lock chain tensioner by insert‐
ing locking pin - T40071- .
– Mark running direction of timing chain (right-side) with paint.
– Unscrew bolts -1- for chain tensioner and -2, 3- for camshaft
sprocket.
– Take off camshaft sprocket, chain tensioner and timing chain
(right-side).
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with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi A8 2003 ➤
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1. Chain drive