Valve gear - Assembly overview — VW

Valve gear - Assembly overview
40 Nm + 90° (
1
/
4
turn) further
Left-hand thread
Renew
50 Nm + 90° (
1
/
4
turn) further
Renew
Camshaft adjuster
Must not be dismantled
Removing and installing
Chapter
Camshaft pulley
Note position when installing the control chain
Camshaft variable timing adjustment valve 1
N205
Checking
Vehicle diagnosis, testing and information system
VAS 5051
or
Vehicle Diagnosis and Service Information System
VAS 5052
10 Nm
O-ring
Renew if damaged.
10 Nm + 90° (
1
/
4
turn) further
Renew
Tighten from centre outwards
Camshaft housing
Removing and installing
Chapter
Remove sealant remnants
Apply
sealing compound
D 188 800 A1
before fitting
When installing fit vertically from above onto studs and dowel pins
Roller rocker finger
Check roller bearing
Oil contact surfaces
Use securing clip to clip onto support element when installing
Cotters
Support element
Check oil spray drillings
With hydraulic valve clearance compensation
Do not interchange
Before installing check camshaft axial clearance
Chapter
Oil contact surfaces
Valve spring plate
Valve spring
Removing and installing with removed cylinder head using
hold down tool for valve springs
3362
With cylinder head installed
Chapter
Valve stem seal
Renewing
Chapter
Repair valve guide
With collar
Valve guide
Checking
Chapter
.
Cylinder head
Reworking valve seat
Chapter
Reworking sealing surface
Fig.
Valves
Do not rework. Only lapping-in is permitted
Valve dimensions
Fig.
Exhaust gas recirculation valve
N18
with
exhaust gas recirculation potentiometer
G212
Removing and installing
Chapter
Sealing cover
For inlet camshaft
Coolant pipe/bracket
Remove to remove sealing cap
Item
Sealing cover
For outlet camshaft
Remove to remove coolant pipe/bracket
Item
Outlet camshaft
Do not interchange with inlet camshaft
Checking axial clearance
Chapter
Coat with oil before inserting (also axle bearing shoulder)
Inlet camshaft
With cams for high pressure pump
arrow
Remove to remove bucket tappets of the high pressure pump and renew
Do not interchange with outlet camshaft
Checking axial clearance
Chapter
Coat with oil before inserting (also axle bearing shoulder)
Guide sleeve
Reworking cylinder head sealing surface
Cylinder head reworking limit:
Dimension
a
= 108.25 mm min.
Note
When the sealing surface has been reworked, the valves must be set deeper by the same amount (rework valve seats) otherwise the valves will strike the pistons. When performing this work ensure that the minimum dimension
Chapter
does not remain under.