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

A4 Cabriolet Mk2

Intake manifold (bottom section) - exploded view of components
   
Intake manifold (bottom section) - exploded view of components
1 - Bottom section of intake manifold
q   Removing and installing → Chapter
q   After installing, adapt the two intake manifold flap potentiometers in mode “Guided Fault Finding”, option “Adapt intake manifold flap potentiometer”
2 - Fuel rail
3 - Fuel pressure sender -G247-
4 - High-pressure pipes
  WARNING
t  The pressure in the high-pressure part of the injection system must be reduced to a residual pressure prior to opening the system → Chapter.
t  A clean cloth must then be wrapped around the connection and the residual pressure dissipated by carefully loosening the connection.
q   Do not alter shape
q   Tightening high-pressure pipes → Anchor
5 - 10 Nm
6 - Sleeve
7 - 10 Nm
8 - 2.5 Nm
9 - 10 Nm
10 - Retainer for fuel rail
11 - Vacuum unit for actuating intake manifold flaps
12 - Vacuum hose
q   To intake manifold flap valve -N316-
13 - 2.5 Nm
14 - Intake manifold flap potentiometer
q   Left side: intake manifold flap potentiometer 2 -G512-, right side: intake manifold flap potentiometer -G336-
15 - 2.5 Nm
16 - Seal
q   Renew if damaged
q   When renewing lever out with screwdriver
q   Press in by hand
17 - Seal
q   Renew if damaged
q   When renewing lever out with screwdriver
q   Press in by hand
18 - Gaskets
q   Renew
19 - Support ring
q   Make sure it is correctly seated
q   Via this support ring, the fuel rail exerts the force which holds the injector in the cylinder head.
20 - O-ring
q   Renew
q   Lubricate lightly with clean engine oil
21 - Spacer ring
q   Renew if damaged
22 - Radial compensation element
q   Renew if damaged
q   Clip onto support ring -item 19-
23 - Combustion chamber ring seal
q   Renewing → Chapter „Removing and installing injectors“
24 - Injector
Removing and installing → Chapter

   

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