Audi A8 2003 Workshop Manual page 168

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
♦ Compression tester - V.A.G 1763- with adapter - V.A.G
1763/8-
Test requirements
• Engine oil temperature approx. 80 °C
• Battery voltage at least 12.5 V.
Test sequence
Note
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All cable ties which are released or cut open when removing must
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.
be refitted in the same position when installing.
– Carefully pull engine cover panel off four retaining pins one
after the other -arrows-.
– Detach electrical connectors at glow plugs.
– Detach electrical connector -arrow- for high-pressure pump.
Note
To improve access to the glow plugs on cylinders 4 and 8, push
intake manifold flap motors on left and right slightly to the side.
– Unscrew bolts -arrows- on intake manifold (left and right) and
push intake manifold flap motor - V157- / intake manifold flap
motor 2 - V275- slightly to the side. The linkage remains con‐
nected.
162
Rep. gr.15 - Cylinder head, valve gear