Audi A8 2003 Workshop Manual page 132

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
Cylinder bank 2 (left-side):
– Remove adjustment pin - T40060- from both camshafts.
Note
If the adjustment pins cannot be inserted in the camshafts, the
camshafts can be turned slightly using adapter - T40061- . To do
so, screw two securing bolts for camshaft sprocket approx. 5 turns
into camshaft.
Caution
The crankshaft must not be at TDC at any cylinder when the
camshaft is turned. Otherwise, there is a risk of damage to
valves and piston crowns.
– Install timing chain (left-side) with camshaft sprocket, guide
rail and tensioning rail.
• The elongated holes in the sprocket must be aligned centrally
over the tapped holes in the camshaft.
– Tighten bolts -1- and -3- for guide rail and tensioning rail.
– Screw in two bolts -2- for sprocket, but do not tighten bolts.
• It should just be possible to turn the sprocket on the camshaft
without axial movement.
– Lock camshaft (left-side) with adjustment pin - T40060- .
• The side pin -arrow- on the adjustment pin - T40060- must be
in line with the imaginary line between the adjustment pin and
the centre of the camshaft.
– Pull out drill bit (∅ 3.3 mm) -item 4- from hole; this releases
the chain tensioner (left-side).
126
Rep. gr.15 - Cylinder head, valve gear
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