Octavia Mk1
Repairing Valve Gear |
Note
t | Cylinder head and ladder frame must always be replaced together. |
t | After carrying out work on the valve gear, carefully crank engine at least 2 revolutions to ensure that no valve touches the piston when the engine is started. |
1 - | 100 Nm |
q | to release and tighten use counterholder -T30004 - |
2 - | Camshaft sprocket |
q | to remove and install, remove toothed belt → Chapter 13-2 |
q | installation position fixed by parallel key → Item |
q | for engines with engine identification characters AVU with rotor for hall sender -G40- |
3 - | Gasket ring |
q | do not oil sealing lip of gasket ring |
q | replacing → Chapter 15-3 |
4 - | Parallel key |
5 - | 20 Nm |
6 - | Ladder frame |
q | Reworking of sealing surfaces not permissible |
q | with integrated camshaft bearing |
q | Bearing 1 for camshaft sprocket |
q | pay attention to tightening order of camshaft bearings → Chapter 15-3 |
q | Apply sealant -D 188 800 A1- carefully in the sealant groove and to the bottom sealing surface |
7 - | Camshaft |
q | The rework of the camshaft is not permissible |
q | inspecting axial play → Fig. |
q | removing and installing → Chapter 15-3 |
q | Slack: max. 0.01 mm |
q | for engines with engine identification characters AVU without rotor for hall sender -G40- |
8 - | Roller rocker arm |
q | do not interchange |
q | inspect roller bearings |
q | oil contact surface |
q | for installing, clip onto hydraulic supporting element with locking clip |
9 - | Supporting element |
q | do not interchange |
q | with hydraulic valve clearance compensation |
q | oil contact surface |
10 - | Valve collets |
11 - | Valve spring retainer |
12 - | Valve spring |
q | removing and installing |
– | with cylinder head removed: |
with -MP 1-211- and -MP 1-213- with valve supporting plate -MP 1-218- |
– | with cylinder head installed → Chapter 15-4 |
13 - | Valve stem seal |
q | replacing → Chapter 15-4 |
14 - | Cap |
q | insert flush |
q | for removal, only push the rubber through the middle using a screwdriver and release |
15 - | Valve guide |
q | inspect → Chapter 15-4 |
16 - | Cylinder head |
q | reworking valve seats → Chapter 15-4 |
17 - | Valve |
q | do not rework, only grinding in is permissible |
q | Valve dimensions → Fig. |
|
Note
|
Dimension | Inlet valve | Exhaust valve | |
Ø a | mm | 39,5 ± 0,15 | 32,9 ± 0,15 |
Ø b | mm | 5,98 ± 0,007 | 5,965 ± 0,007 |
c | mm | 93,85 | 93,85 |
α | ∠° | 45 | 45 |