Audi A8 2010 Workshop Manual page 45

Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
– Unplug electrical connectors -1- and -6-.
– Remove bolt -3- on retaining clip.
– Unscrew connections -2- and -5-.
– Remove bolts -arrows-.
– Carefully pull out high-pressure pump. It is possible that the
roller tappet may remain lodged inside.
Note
Do not attempt to bend high-pressure pipe to a different shape.
♦
Disregard -item 4-.
♦
Installing
Installation is carried out in the reverse order; note the following:
• Tightening torques
⇒ „2.14 High-pressure pump - exploded view", page 36
Note
Fit new O-ring.
♦
The connections of the high-pressure pipe must not be dam‐
♦
aged.
Do not attempt to bend high-pressure pipe to a different shape.
♦
– Check roller tappet -1- for damage and renew if necessary.
– Lightly lubricate roller tappet with oil and insert it so that lug
-arrow A- slides into guide notch -arrow B-.
– Rotate crankshaft in direction of engine rotation by turning bolt
for vibration damper, and at the same time press roller tappet
into cylinder head until it reaches its lowest point.
– Only lift high-pressure pipe slightly to fit high-pressure pump.
– Press high-pressure pump down by hand as far as possible
onto stop.
– At the same time, tighten securing bolts by hand.
– Then tighten securing bolts alternately to 5 Nm (do not tilt high-
pressure pump).
– Now tighten securing bolts alternately to final torque.
• Tightening torque for securing bolts
⇒ Fig. "„High-pressure pump - tightening torque and se‐
quence"" , page 37
– Install high-pressure pipe
⇒ „2.15 Removing and installing high-pressure pipe",
page 37 .
– Check fuel system for leaks
⇒ „1.7 Checking fuel system for leaks", page 4
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
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 2010 ➤
41
2. Injection system