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Removing and installing engine cover panel > < Cylinder head

Leon Mk2

Cylinder head - Assembly overview
Cylinder head - Assembly overview
  Note
t  Renew cylinder head bolts.
t  During 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  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 - Cylinder head gasket
q   replace
q   Note the fitting position: Part number must face cylinder head
2 - Bolt
q   25 Nm
3 - Transport lug
4 - Bolt
q   Tightening sequence → Fig.
5 - Cylinder head
q   Removing and installing → Chapter.
q   Check for deformations → Fig.
6 - Cylinder head bolt
q   replace
q   Follow the correct loosening sequence → Fig.
q   Note correct sequence when tightening → Fig.
7 - O ring
q   Lubricate with engine oil
8 - Sealing cap
q   replace
q   5 Nm
q   With ball head for engine cover panel
9 - Sealing cap
q   With gasket
10 - O ring
q   Lubricate with engine oil
11 - Sealing cap
q   replace
12 - Support
13 - Bolt
q   9 Nm
14 - Heat shield
15 - Bolt
q   20 Nm
16 - Bolt
q   20 Nm
17 - To intake hose / turbocharger
18 - Breather pipe
19 - O ring
q   Not available as a separate replacement part
20 - Seal
q   Not available as a separate replacement part
21 - Engine cover panel
22 - Bolt
q   Tightening sequence → Fig.
23 - Crankcase breather
q   Note correct sequence when tightening → Fig.
24 - Leads to intake manifold
25 - Seal
q   Not available as a separate replacement part
26 - Seal
q   If this is damaged, replace it
27 - Vacuum pump
q   Removing and installing → Chapter.
28 - Securing bolt for vacuum pump
q   Tightening torque: 8 Nm + 180°
29 - Not fitted
30 - Not fitted
31 - Not fitted
32 - Bracket
33 - Bolt
q   9 Nm
34 - Joint mouth
35 - O ring
q   replace
q   Lubricate with coolant
36 - Bolt
q   25 Nm
37 - Transport lug
38 - Bolt
q   9 Nm
39 - Hall sender -G40-
40 - Separating plate

   
Crankcase breather system - tightening torque
–  Tighten bolts for crankcase breather system in the sequence -1 ... 10- to 11 Nm.
  A15-10605
Slackening cylinder head bolts
–  Remove bolts -arrows-.
–  Loosen cylinder head bolts using special wrench, long reach -T10070- in sequence -1 … 5-.
  A15-10474
Tightening sequence for cylinder head
–  Tighten cylinder head bolts in sequence -1 … 5- using special wrench, long reach -T10070- as follows.
1.  Tighten with torque wrench initially to 40 Nm.
2.  Use fixed wrench to turn 90° further.
3.  Use fixed wrench to turn 90° further.
4.  Pre-tighten the bolts -arrows- to 8 Nm.
5.  Turn bolts -arrows- 90° further using a rigid wrench.
  A15-10475
Checking cylinder head for distortion
–  Use straight edge 500 mm -VAS 6075- and feeler gauge to measure cylinder head for distortion at several points.
t  Maximum permissible deformation: 0.05 mm
  V15-0654

Removing and installing engine cover panel > < Cylinder head