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Wiring and component check with adapter cable, 121-pin V.A.G 1598/31 (test box) > < Removing and installing injectors

A4 Cabriolet Mk2

Removing and installing injector with needle lift senderG80
Removing and installing injector with needle lift sender -G80-
Needle lift sender -G80- is not fitted on engines with code letters BCZ. Commencement of injection is determined and controlled by engine control unit.
Removing
–  Remove engine cover panel → Chapter.
–  Remove cylinder head cover (right-side) → Rep. Gr.15.
–  Unplug connector for needle lift sender -G80- (brown connector on bulkhead).
   
–  Slacken the two nuts -arrows- on retainer for injector in No. 3 cylinder.
–  Pull out injector together with needle lift sender -G80-.
If one of the cams prevents the injector from being withdrawn (vehicles with manual gearbox):
–  Engage 4th gear and push the vehicle forwards slightly.
If one of the cams prevents the injector from being withdrawn (vehicles with automatic gearbox):
–  Screw retainer back onto injector again.
–  Unplug electrical connector from injection pump.
  WARNING
Before operating the starter, make sure that all the injectors are secured with their retainers and that the injection pump connector is detached.
–  Operate starter briefly and check whether injector with needle lift sender -G80- can now be removed.
Installing
–  Remove copper seal (between injector and cylinder head) from cylinder head.
  Note
The copper seal must always be renewed.
  A23-0076
–  Install new injector with collar -2- and new copper seal -1-.
–  When installing injector, make sure that locating pin -3- fits into groove in cylinder head.
–  Secure retainer.
l  Tightening torque: 10 Nm
  A23-0078
–  Run electrical wire along metal channel in camshaft bearing -arrow-.
–  Fit semi-circular rubber seal on wire into cut-out provided in cylinder head.
  Note
Do not slide the semi-circular rubber seal along the wire (the seal is bonded to the wire to ensure proper sealing).
–  Re-install cylinder head cover (right-side) → Rep. Gr.15.
  A23-0077

Wiring and component check with adapter cable, 121-pin V.A.G 1598/31 (test box) > < Removing and installing injectors