Audi Workshop Service and Repair Manuals > A3 Mk2 > Power unit | Direct petrol injection and ignition system (5-cyl. 2.5 ltr. 4-valve turbo) | Mixture preparation system, electronic inj.,Gas | Intake manifold, fuel rail and injectors | Removing and installing intake manifold (bottom section) with fuel rail

Removing and installing intake manifold (bottom section) with fuel rail

Removing

–	Remove intake manifold (top section) → Chapter.

–	Remove high-pressure pipe → Chapter.

–	Remove noise insulation -1- → Rep. gr.66.

Note

Fit all cable ties in the original positions when installing.

–	Pull out oil dipstick -2-.

–	Remove bolts -arrows- and lift off guide tube -1- for oil dipstick.

–	Unplug electrical connectors:

1 -	Intake manifold flap valve -N316-

4 -	Fuel pressure sender -G247-

5 -	Intake manifold flap potentiometer -G336-

–	Disconnect vacuum hose -2- and hose -3- from activated charcoal filter and move clear.

–	Move electrical wiring clear.

–	Loosen bolts in the sequence -11 ... 1-.

–	Remove bolts and detach intake manifold (bottom section).

Caution

Risk of irreparable damage to engine.

Block off the openings of the intake ports in the cylinder head with a clean cloth to prevent small items from dropping into the engine.

Note

Injectors must be removed before gasket for intake manifold (bottom section) can be detached.

–	Remove injectors → Chapter.

Installing

Installation is carried out in the reverse order; note the following:

l	Tightening torque → Fig. „„Intake manifold (bottom section) - tightening torque and tightening sequence““

Note

t	Renew gaskets and O-rings.

t	Injectors must be installed after gasket for intake manifold (bottom section) has been attached.

–	Install injectors → Chapter.

–	Secure dipstick guide tube → Rep. gr.17.

–	Install high-pressure pipe → Chapter.

–	Install intake manifold (top section) → Chapter.

–	Install noise insulation → Rep. gr.66.

Audi Workshop Service and Repair Manuals