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Valve control: repairs > < Sealing flange and flywheel / drive plate: removing and fitting

Leon Mk1

Assembly overview
   
Assembly overview
1 - 50 Nm + turn 90° further
q   Renew.
2 - Camshaft pulley
q   Check the position on fitting the distribution chain
3 - 10 Nm
4 - Hall sender -G40-
q   With O-ring.
q   Renew O-ring if damaged.
q   removing and installing → Chapter
5 - Cylinder head cover:
  Caution
The M6 x 70 studs must be screwed in the cylinder head before fitting the cylinder head cover.
The head bolts are used to guide the cylinder head cover and prevent that the roller rocker fingers loosen from the support elements.
The cylinder head cover is sealed with 2 different sealants!
q   removing and installing → Chapter
q   Remove any sealant remains.
q   Before installing, apply the sealants D 189 500 A1 and D 154 103 A1
q   When installing fit vertically from above onto studs and dowel pins
6 - Non-return valve
  Note
The O-rings are not available as a separate spare part.
7 - 10 Nm
8 - O-ring
  Note
The O-rings are not available as a separate spare part.
q   Replace the O-rings of the check valve in event of wear
q   Before mounting, lightly grease with engine oil
9 - Camshaft:
q   removing and installing → Chapter
q   Checking axial clearance → Chapter.
q   Apply oil before fitting (also axial bearing collar)
10 - Valve cotters
11 - Valve spring plate
12 - Valve stem oil seal
q   Renew.
13 - Valve spring
q   With removed cylinder head, remove and install the assembly device for valves -2036- and the valve lever -VW 541/1A-.
q   With cylinder head installed → Chapter.
14 - Valve guide
q   checking → Chapter
15 - Cylinder head
q   removing and installing → Chapter
q   Reworking valve seats → Chapter.
q   Reworking sealing surface → Fig..
16 - Valves
q   Do not rework. Only lapping in is permitted.
q   Valve dimensions → Fig.
17 - Locking nut, 15 Nm
18 - Oil seal
q   Renew.
19 - Dowel pins
20 - 8 Nm
q   Observe the correct tightening order
q   removing and installing → Chapter
21 - Retaining frame
q   For camshaft
q   removing and installing → Chapter

   
Reworking cylinder head sealing surface
Cylinder head reworking dimension: a = minimum 103.75 mm
  Note
When the sealing surface is reworked, the valves must be lowered by the same amount (rework the valve seat inserts), if not the pistons will collide with the valves. When doing this, ensure that the permissible minimum dimension is maintained → Chapter.
  N15-10644

Valve control: repairs > < Sealing flange and flywheel / drive plate: removing and fitting