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Renewing combustion chamber ring seal (teflon ring seal) > < Injectors

A4 Mk3

Removing and installing injectors
Removing and installing injectors
Special tools and workshop equipment required
   
t  Tool kit with puller -T10133-
  Note
Special tool T10133/2 (puller) has been modified and now has the designation puller T10133/2 A. If you have not yet received the new tool you can make the modification yourself.
Modifying special tool T10133/2 (puller) to make it equivalent to puller T10133/2 A
–  File out a semi-circular recess as shown in the illustration. The recess allows the tool to be pushed further onto the injector so the contact surface is increased.
  W00-1258
–  For identification purposes, mark the modified tool with the letter „A“ after the tool number.
Special tools and workshop equipment required
t  Round file, approx. 6 mm
Removing
–  Remove engine cover panel.
–  Remove intake manifold and fuel rail (engine codes CDNB, CDNC, CAEB, CDZA, CAEA, CADA → Chapter).
–  Remove intake manifold and fuel rail (engine codes CFKA, CMPA → Chapter).
Removing injectors (from fuel rail)
Carefully pull injectors out of fuel rail.
Removing injectors (from cylinder head)
  N24-10447
Injector (old version)
1 - Combustion chamber ring seal (teflon ring seal) - renew; when fitting, do not grease ring or use any other lubricant
2 - Support ring is replaced by intermediate ring; see next illustration → Fig.
3 - Injector
4 - Spacer ring (renew if damaged)
5 - O-ring (renew; apply thin coating of clean engine oil prior to installation)
6 - Support ring (via this support ring, fuel rail exerts force which secures injector in cylinder head)
  A24-10561
Injector (new version)
1 - Intermediate ring (renew)
2 - Retainer
3 - Combustion chamber ring seal (teflon ring seal) - renew; when fitting, do not grease ring or use any other lubricant
4 - Injector
5 - Spacer ring (renew if damaged)
6 - O-ring (renew; apply thin coating of clean engine oil prior to installation)
7 - Support ring (via this support ring, fuel rail exerts force which secures injector in cylinder head)
–  Cover open inlet ports with a clean cloth.
–  Unplug electrical connector at injector that is to be removed.
  A24-10795
–  Guide puller -T10133/2A- into groove on injector.
–  Then attach removal tool -T10133/16- and pull out injector by turning bolt -1-.
  Note
The combustion chamber ring seal must always be renewed prior to reinstalling the injector → Chapter.
  A24-10579

Renewing combustion chamber ring seal (teflon ring seal) > < Injectors