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Removing and installing camshaft control valve 1N205 > < Cylinder head

A3 Mk2

Cylinder head - exploded view
Cylinder head - exploded view
  Note
t  Renew the cylinder head bolts.
t  On assembly, renew oil seals and gaskets as well as self-locking nuts and bolts that are tightened by turning through to a specified angle.
t  When installing an exchange cylinder head with fitted camshafts, oil the contact surfaces between the roller rocker fingers and cams.
t  The plastic protectors fitted to protect the open valves must only be removed immediately before fitting the cylinder head.
t  When fitting a new cylinder head or cylinder head gasket, drain off all the old coolant and refill with new coolant.
   
1 - Bolt
q   Tightening sequence → Fig.
2 - Cylinder head cover
3 - Seal
q   Renew if damaged or leaking
4 - Valve housing
5 - Oil filler cap
6 - Seal
q   Renew if damaged or leaking
7 - Bolt
q   4 Nm
8 - Gasket for cylinder head cover
q   Renew if damaged or leaking
9 - Vacuum pump
10 - Bolt
q   4 Nm
11 - Camshaft control valve 1 -N205-
q   Removing → Chapter
12 - Seal
q   Renew
13 - Bolt
q   10 Nm
14 - Cable retainer
15 - Seal
q   Renew if damaged or leaking
16 - Bolt
q   10 Nm
17 - Housing
18 - Gasket
q   Renew
19 - Transport plate
20 - Bolt
q   25 Nm
21 - Stud for intake manifold
q   10 Nm
22 - Separating plate
23 - Cylinder head gasket
q   Renew
q   Check installation position: Part No. towards cylinder head
24 - Bolt
q   10 Nm
25 - Hall sender -G40-
26 - Seal
27 - Stud for tensioning roller
q   10 Nm
28 - Stud for exhaust manifold
q   20 Nm
29 - Cylinder head
q   Checking for distortion → Fig.
30 - Cylinder head bolt
q   Renew
q   Note correct sequence when loosening → Fig.
q   Note correct sequence when tightening → Fig.
q   Tightening torque: 40 Nm + 1/2 turn (180°) further

   
Tightening sequence for cylinder head cover
1.  Screw in bolts -1 ... 14- hand-tight.
2.  Tighten bolts -1 ... 14- to 10 Nm in diagonal sequence.
  N15-10047
Slackening cylinder head bolts
–  Loosen cylinder head bolts in the sequence indicated and remove.
  A15-0764
Tightening sequence for cylinder head
–  Then tighten cylinder head bolts in the sequence -1 ... 10- as follows:
–  1. Tighten with torque wrench initially to 40 Nm.
–  2. Use rigid wrench to turn 90° further.
–  3. Use rigid wrench to turn 90° further.
  A15-0767
Checking cylinder head for distortion
–  Use straight edge and feeler gauge to measure for distortion at several points.
t  Max. permissible distortion: 0.05 mm
  V15-0654

Removing and installing camshaft control valve 1N205 > < Cylinder head