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Camshafts > < Testing the compression

Octavia Mk1

Repairing valve gear
Repairing valve gear
  Note
t  Cylinder heads with cracks between the valve seats or between a valve seat ring and the spark plug thread may continue to be used without any reduction in life provided these are slight initial cracks which are not more than 0.3 mm wide, or cracks exist only at the first 4 turns of the spark plug thread.
t  After installing new bucket tappets, the engine must not be started for about 30 minutes (otherwise place the valves on the pistons).
t  After carrying out work on the valve gear, carefully crank engine in the direction of running at least 2 revolutions to ensure that no valve touches the piston when the engine is started.
   
1 - 10 Nm
2 - Inlet camshaft
q   Inspecting axial play → Chapter
q   Removing and installing camshafts → Chapter
3 - Drive chain
q   check for wear
q   mark running direction (installed position) before removing → Chapter
4 - Camshaft adjuster
q   with camshaft adjustment valve 1 -N205-
q   Seal the joints between the camshaft adjuster/cylinder head → Fig.
q   removing and installing → Chapter
5 - rubber metal seal
q   replace → Chapter
6 - Cylinder head
q   removing and installing → Chapter
q   reworking valve seats → Chapter
q   inspecting valve guides → Chapter
q  
7 - Exhaust valve
q   with a sodium filling
q   Observe specifications for disposing of the valves with a sodium filling → Chapter
q   do not rework, only grinding in is permissible
q   Valve dimensions → Chapter
q   inspecting valve guides → Chapter
q   reworking valve seats → Chapter
8 - Inlet valve
q   do not rework, only grinding in is permissible
q   Valve dimensions → Chapter
q   inspecting valve guides → Chapter
q   reworking valve seats → Chapter
9 - Gasket ring
q   for inlet camshaft
q   replace → Chapter
q   pay attention to different version → Chapter
10 - Trim for hall sender
q   check fitting position:
   Insert the peg in the notch of the camshaft
11 - Washer
q   with cone
q   Check fitting position
12 - 25 Nm
13 - Hall sender -G40-
14 - 10 Nm
15 - 65 Nm
q   to release and tighten use counterholder -MP1-216 (3036)-
16 - Camshaft sprocket
q   for exhaust camshaft
q   check fitting position:
   the small stay on the camshaft sprocket points outwards and the TDC marking on the cylinder 1 is visible from the front
17 - Gasket ring
q   for exhaust camshaft
q   replace → Chapter
q   pay attention to different version → Chapter
18 - Valve stem seal
q   replace → Chapter
19 - Valve spring
q   removing and installing → Chapter
20 - Valve spring retainer
21 - Valve collets
22 - Hydraulic bucket tappets
q   do not interchange
q   oil contact surfaces
q   lay aside with contact surface facing down
q   before installing check axial play of the camshaft → Chapter
q   check → Chapter
q   removing and installing → Chapter
23 - Bearing cap/inlet camshaft
q   must be positioned on the dowel sleeves in the cylinder head
q   Check fitting position
q   order of installation → Chapter
24 - Double bearing cover
q   must be positioned on the dowel sleeves in the cylinder head
q   Seal the joints between the double bearing cap/cylinder head → Fig.
q   apply sealant - D 454 300 A2- lightly on the sealing surface before installing → Chapter
25 - Bearing cover/exhaust camshaft
q   must be positioned on the dowel sleeves in the cylinder head
q   Check fitting position
q   order of installation → Chapter
26 - Exhaust camshaft
q   removing and installing → Chapter

   
Seal the joints between the double bearing cap/cylinder head
–  Seal all the edges of the sealing surfaces double bearing cap/cylinder head -arrows- carefully with a thin layer of sealant -D 454 300 A2- using a small screwdriver.
  A15-0137
Seal the joints between the camshaft adjuster/cylinder head
–  Seal all the edges of the sealing surfaces camshaft adjuster/cylinder head -arrows- carefully with a thin layer of sealant -D 454 300 A2- using a small screwdriver.
  A15-0138

Camshafts > < Testing the compression