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Removing and installing injectors > < Removing and installing intake manifold

A4 Cabriolet Mk2

Injectors and fuel rail - exploded view
   
Injectors and fuel rail - exploded view
1 - Radial compensation element
q   Renew if damaged
q   Clip onto support ring → Item
2 - Combustion chamber ring seal
q   Do not apply grease to ring seal or use any other lubricants
q   Renewing → Chapter „Removing and installing injectors“
3 - Injector
q   Removing and installing → Chapter
4 - Spacer ring
q   Renew if damaged
5 - O-ring
q   Renew
q   Lubricate lightly with clean engine oil
6 - Support ring
q   Renew
q   Via this support ring, the fuel rail exerts the clamping force that holds the injector in the cylinder head
7 - Fuel rail
q   Removing and installing → Chapter „Removing and installing injectors“
8 - High-pressure pipe
  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   Connections must not be damaged
q   Do not alter shape
q   Tightening high-pressure pipes → Anchor
9 - High-pressure pipe
  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   Connections must not be damaged
q   Do not alter shape
q   Tightening high-pressure pipes → Anchor
10 - Pressure relief valve, 140 bar
q   For high-pressure pipe
q   Tighten to 25 Nm
11 - Bolt
q   9 Nm
q   Tighten in stages and in diagonal sequence
12 - Bolt
q   9 Nm
q   Tighten in stages and in diagonal sequence

   

Removing and installing injectors > < Removing and installing intake manifold