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Removing and installing cylinder head cover > < Removing and installing cylinder head

A4 Cabriolet Mk2

Cylinder head - exploded view
   
Cylinder head - exploded view
1 - Toothed belt cover (rear)
2 - Rubber grommet
q   Renew if damaged
3 - Threaded pin, 15 Nm
4 - Hub for inlet camshaft
q   With sender wheel for Hall sender -G40-
q   To remove, use puller -T10052- → Anchor
5 - 100 Nm
q   Use counterhold tool -T10051- when loosening and tightening → Chapter „Removing and installing camshafts“
6 - Hub for exhaust camshaft
q   Different types depending on production version
q   To remove, use puller -T10052- → Anchor
7 - 10 Nm
q   Apply locking fluid when installing; refer to → Electronic parts catalogue
8 - Rocker arm shaft
q   Mark allocation of rocker arms
q   Do not interchange
q   Removing and installing → Chapter „Removing and installing cylinder head“
q   Before installing, check that all ball studs and O-rings are inserted in the unit injectors → Fig.
9 - Bolt for rocker arm shaft
q   Renew
q   Note correct sequence when loosening → Anchor
q   Note correct sequence when tightening → Anchor
10 - Gasket for cylinder head cover
q   Renew if damaged or leaking
q   Engage in spacer sleeves of → Item
11 - Cylinder head cover
q   Removing and installing → Chapter
12 - Crankcase breather hose
13 - Filler cap
14 - Seal
q   Renew if damaged or leaking
15 - Cap
16 - Special bolt, 10 Nm
q   Renew if damaged or leaking
q   Note sequence for loosening and tightening → Chapter „Removing and installing cylinder head cover“
17 - Vacuum hose
18 - 20 Nm
19 - Cylinder head bolt
q   Renew
q   Note correct sequence when loosening → Anchor
q   Note correct sequence when tightening → Anchor
20 - Washer
q   When cylinder head is removed, fit washer in cylinder head before installing bearing frame
21 - 20 Nm
22 - Tandem pump
q   Removing and installing → Rep. Gr.20
23 - Gasket
q   Renew
24 - Cylinder head
q   Removing and installing → Chapter
  Caution
t  Vehicles with ceramic glow plugs: The ceramic glow plugs are very easily damaged and project slightly beyond the cylinder head gasket surface, so do NOT lay the cylinder head down on the gasket side while the glow plugs are still installed.
t  Handling ceramic glow plugs → Chapter.
q   Checking for distortion → Fig.
q   If renewed, change coolant and engine oil
25 - Cylinder head gasket
q   Renewing → Chapter „Removing and installing cylinder head“
q   Note marking → Fig.
q   If renewed, change coolant and engine oil
26 - Hall sender -G40-
q   For camshaft position
27 - 10 Nm
q   Apply locking fluid when installing; refer to → Electronic parts catalogue

   
Ball stud for rocker arm shaft
–  Before installing rocker arm shaft, check that all ball studs -1- and O-rings -2- are fitted in unit injectors.
  A15-0942
Checking cylinder head for distortion
–  Use straight edge and feeler gauge to measure for distortion at several points.
l  Maximum permissible distortion: 0.1 mm.
  Note
The cylinder heads of diesel engines must not be machined.
  V15-0654
Identification of cylinder head gasket
1 - Part No.
2 - Production code (can be disregarded)
3 - Holes
  Note
Cylinder head gaskets of different thicknesses are fitted depending on the amount of piston projection → Chapter. When renewing just the cylinder head gasket, the new gasket should have the same identification as the old one.
  A15-0802

Removing and installing cylinder head cover > < Removing and installing cylinder head