Audi A6 Repair Manual page 37

– Remove intake manifold upper
– Remove high-pressure line, thereby removing bolts and union
nuts -1 through 7-.
– Disconnect electrical harness connectors:
1 - Intake manifold runner position sensor 2 -G512-
2 - Fuel pressure sensor -G247-
– Remove bolts and nuts -arrows- and remove intake manifold
lower with fuel rail.
Note
Plug intake ports of the cylinder head with clean rags.
Installing
Installation is in reverse order of removal, note the following:
Note
Replace gaskets and O-rings.
♦
Lightly lubricate fuel injector O-rings with clean engine oil.
♦
– Connect hand vacuum pump -VAS 6213- to intake manifold
runner control vacuum actuator, as shown in illustration.
– Generate vacuum using hand vacuum pump.
• The intake flaps are opened.
Note
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If the intake flaps are not opened, they could have seized when
installing the intake manifold lower to the cylinder head.
– Install intake manifold lower and press fuel rail evenly onto fuel
injectors.
Fuel Injection and Ignition - Edition 03.2008
⇒ page 29 .
Audi A6 2005 ➤
5. Removal and Installation
33