Audi A8 2003 Workshop Manual page 166

Audi A8 2003 ➤
8-cylinder TDI engine (4.0 ltr. 4-valve common rail), mechanics - Edition 12.2013
♦ Sealant ⇒ Electronic parts catalogue
Removing
– Remove engine ⇒ page 7
– Remove camshaft timing chains
– Remove relevant cylinder head cover: left-side
right-side ⇒ page 141
– Unscrew retaining frame bolts and nuts in the sequence
-22 ... 1-.
Note
Make sure you do not damage roller rocker fingers and compen‐
sation elements when removing camshafts.
– Carefully remove retaining frame and camshafts.
Installing
Caution
The camshafts MUST be installed using the camshaft fitting
tool - T40094- as described in the following, as the thrust bear‐
ings in the retaining frame would otherwise be destroyed. The
cylinder head would then have to be renewed.
WARNING
Wear safety goggles.
– Remove remaining sealant from cylinder head and retaining
frame using rotating plastic brush or similar.
Caution
Make sure that no sealant residue gets into the cylinder head
or the bearings.
– Clean sealing surfaces; they must be free of oil and grease.
– Lubricate running surfaces of camshafts.
160
Rep. gr.15 - Cylinder head, valve gear
.
⇒ page 99 .
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⇒ page 137 ,