Assembly Overview
Assembly overview
Engine codes AEG, AVH, AZG, BEV
1- 100 Nm
^ Use counterhold 3415 to loosen and tighten
2- Camshaft sprocket
3- Seal
4- Woodruff key
5- 20 Nm
6- Bearing cap
^ Coat contact surfaces of bearing cap 1 lightly with sealing compound AMV 174 004 01.
7- Camshaft
^ Check radial clearance with Plastigage(R), Wear limit: 0.1 mm
^ Run-out: max. 0.05 mm
8- Hydraulic lifter
^ Do not interchange
^ Store with cam contact surface downward
^ Before installing check camshaft axial clearance
^ Oil contact surface
9- Keepers
10- Valve spring upper plate
11- Valve spring
13- Valve guide
14- Cylinder head
15- Valves
^ Do not rework, only lapping is permitted
Engine code BBW
1- Camshaft sprocket
^ With camshaft timing adjustment
^ Under no circumstances should bolts be loosened.
^ Replace complete
2- Seal
^ Do not oil sealing lips of sealing ring.
3- 20 Nm
4- Bearing cap
^ Coat contact surfaces of bearing cap 1 lightly with sealing compound AMV 174 004 01.
5- Camshaft
^ With sender wheel for camshaft position sensor
^ Check radial clearance with Plastigage(R), Wear limit: 0.1 mm Run-out: max. 0.05 mm
6- Hydraulic lifter
^ Do not interchange
^ With hydraulic valve clearance compensation
^ Store with cam contact surface downward
^ Before installing check camshaft axial clearance
^ Oil contact surface
7- Keepers
8- Valve spring upper plate
9- Valve spring
10- Valve stem seal
11- Valve guide
^ Repair version with shoulder
12- Cylinder head
13- Valves
14- Filter element
^ Pull off with hooks
^ Clean if soiled
15- Sealing plug, 12 Nm
^ Always replace
16- 130 Nm
17- O-ring
^ Always replace
18- Sealing plug, 25 Nm
Fig. 1 Reworking cylinder head sealing surface
Cylinder head reworking dimension:
a = At least 132.6 mm
Note: When the sealing surface has been reworked, the valves must be set deeper by the same amount.
Fig. 2 Checking camshaft axial clearance
Special tools, testers, measuring instruments and auxiliary items required
^ Universal dial gauge bracket VW 387
^ Dial gauge
Check with hydraulic lifters removed and with first and last bearing caps installed.
Wear limit: max. 0.15 mm
Fig. 3 Installed position of camshaft bearing caps
Note offset. Before installing camshaft determine position.
Fig. 4 Valve dimensions
Note: Valves must not be reworked. Only lapping is permitted.
Valve dimensions:
