Audi A8 2003 Workshop Manual page 140

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
Installing
• Crankshaft -1- locked in TDC position with locking pin - 3242- .
• Drive chain for valve gear installed
Note
Renew bolts which are tightened to a specified angle as well as
oil seals and gaskets.
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.
– Check that camshafts on both cylinder heads are positioned
at TDC.
• It should be possible to lock both camshafts with adjustment
pin - T40060- .
• The side pin -arrow- in each adjustment pin - T40060- must
be in line with the imaginary line between the adjustment pin
and the centre of the camshaft.
Cylinder bank 1 (right-side):
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.
134
Rep. gr.15 - Cylinder head, valve gear
⇒ page 140
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