skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

Reworking valve seats > < Valve gear - Summary of components (version A)
Valve gear - Summary of components (version B)
Valve gear - Summary of components (version B)
For engine with identification characters CFNA
   
1 - 50 Nm + torque a further 90° (1/4 turn)
q   replace
2 - Sprocket
q   for inlet / outlet camshaft
q   Observe the fitting position of the timing chain
3 - 10 Nm + torque a further 90° (1/4 turn)
q   replace
q   tighten from inside to outside
4 - Hall sender -G40-
q   with O-ring
q   replace the O-ring if it is damaged
5 - 10 Nm
6 - Camshaft housing
q   removing and installing → Chapter
7 - Screw cap
q   for hole of camshaft
8 - Support
9 - 10 Nm
10 - Roller rocker arm
q   inspect roller bearings of roller for smooth operation
q   oil contact surfaces
q   for installing, clip onto the supporting element and secure with locking clip
11 - Valve collets
12 - Valve spring retainer
13 - Valve spring
q   removing and installing → Chapter
14 - Valve stem seal
q   replace → Chapter
15 - Valve guide
q   check → Chapter
16 - Valve guide
q   repair
q   with collar
17 - Supporting element
q   do not interchange
q   with hydraulic valve clearance compensation
q   before installing check axial play of the camshaft → Fig.
q   oil contact surfaces
18 - Cylinder head
q   reworking valve seats → Chapter
q   reworking sealing surface → Fig.
19 - Valves
q   do not rework, only grinding in with grinding paste is permissible
q   Valve dimensions → Fig.

   
Reworking cylinder head sealing surface
Reworking dimension of cylinder head: -a- at least 108.25 mm
  Note
If the sealing surface is reworked, the valves should be set lower by the same amount (rework valve seat rings) otherwise the valves will strike the pistons. When doing this, ensure that the permissible minimum dimension - → Chapter - is maintained.
  S15-0292
Valve dimensions
  Note
Valves must not be reworked. Only grinding in with grinding paste in the valve seat is permissible.
  S15-0216
DimensionInlet valveExhaust valve
Ø amm29,526,0
Ø bmm5,9735,953
cmm100,9100,5
α∠°4545

   

Reworking valve seats > < Valve gear - Summary of components (version A)