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Removing and installing cylinder head > < Renewing injector seals

A4 Mk3

Cylinder head - exploded view
   
Cylinder head - exploded view
  Note
Illustration shows the cylinder head for cylinder bank 2 (left-side).
1 - Cylinder head gasket
q   Renewing → Chapter
q   Identification → Fig.
q   Installation position: part number must face cylinder head
q   If renewed, change coolant and engine oil
2 - Cylinder head
q   To prevent damage to glow plugs, always place cylinder head on a soft foam surface after removal.
q   Removing and installing → Chapter
q   Checking for distortion → Fig.
q   Cylinder heads must not be reworked on TDI engines
q   If renewed, change coolant and engine oil
3 - Bolt
q   23 Nm
4 - Bracket
5 - Engine lifting eye
6 - Bolt
q   23 Nm
7 - Seals
q   Renew
8 - Banjo bolt
q   Tightening torque → Item
9 - Coolant pipes
10 - Bolt
q   Tightening torque → Item
11 - Banjo bolt
q   Tightening torque → Item
12 - Seals
q   Renew
13 - Bolt
q   23 Nm
14 - Engine lifting eye
15 - Bolt
q   Correct sequence when slackening → Anchor
q   Renew
q   Tightening torque and sequence → Fig.

   
Checking cylinder head for distortion
–  Use straight edge 500 mm -VAS 6075- and feeler gauge to measure cylinder head for distortion at several points.
l  Max. permissible distortion: 0.1 mm.
  Note
Cylinder heads must not be reworked on TDI engines.
  A15-10931
Identification of cylinder head gasket
1 - Part number
2 - Holes
  Note
t  Cylinder head gaskets of different thicknesses are fitted depending on the amount of piston projection → Chapter. When renewing only the cylinder head gasket, the new gasket should have the same identification as the old one.
t  The gaskets for the left and right cylinder heads have different shapes and cannot be interchanged.
  A13-10786
Cylinder head - tightening torque and sequence
  Note
Renew the bolts tightened with specified tightening angle.
–  Tighten bolts in 5 stages in the sequence shown:
  A15-10988
StageBoltsTightening torque/angle specification
1.-1 … 8-Screw in bolts by hand until they make contact
2.-1 … 8-35 Nm
3.-1 … 8-60 Nm
4.-1 … 8-turn 90° further
5.-1 … 8-turn 90° further

   

Removing and installing cylinder head > < Renewing injector seals