Audi A8 2003 Workshop Manual page 137

8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
Removing
Caution
The crankshaft and camshafts must only be turned with the
chain drive mechanism fully installed. Otherwise the valves
may strike the pistons, causing damage to valves and piston
crowns.
– Release fasteners -1-, -2- and -4- and take off noise insulation
panels.
– Position used oil collection and extraction unit below engine.
– Drain off engine oil.
– Remove engine ⇒ page 8
– Separate engine from gearbox
– Secure engine to engine stand
scissor-type assembly platform - VAS 6131 A- .
– Remove timing chain covers
– Attach special wrench - T40049- at rear end of crankshaft us‐
ing two old securing bolts for drive plate.
WARNING
Turn crankshaft only in direction of engine rotation.
If crankshaft has been turned past "TDC" position, turn crank‐
shaft two further rotations until it is again positioned just before
"TDC".
– Turn crankshaft in normal direction of rotation -arrow- to TDC
position.
Note
The adjustment pin - T40060- has a flat -2- which makes it
♦
easier to insert when the locating bores in the camshaft and
cylinder head are not exactly in line.
The adjustment pin is inserted initially so that the side pin -1-
♦
is perpendicular to the imaginary line between the adjustment
pin and the centre of the camshaft.
To obtain the correct TDC position, the side pin -1- must then
♦
be turned 90° -arrow- so it is in line with the imaginary line
between the adjustment pin and the centre of the camshaft.
.
⇒ page 31 .
⇒ page 38 , or leave engine on
⇒ page 108 .
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi A8 2003 ➤
131
1. Chain drive