Engine codes AEG, AVH, AZG, BEV
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1 - 100 Nm
- Use counterhold 3415 to loosen and tighten
2 - Camshaft sprocket
3 - Seal
- Replacing. Refer to Camshaft oil seal, replacing
4 - Woodruff key
- Check for secure seating
5 - 20 Nm
6 - Bearing cap
- Installation position. Refer to Valve seats, reworking and Figure
- Installation sequence. Refer to Engine code BBW , removing and installing camshaft
- Coat contact surfaces of bearing cap 1 lightly with sealing compound AMV 174 004 01.
7 - Camshaft
- Checking axial clearance. See Figure .
- Removing and installing. Refer to Engine code BBW
- Check radial clearance with Plastigage, Wear limit: 0.1 mm
- Run-out: max. 0.05 mm
8 - Hydraulic lifter
- Do not interchange
- With hydraulic valve clearance compensation
- Checking. Refer to Hydraulic lifters, checking
- Store with cam contact surface downward
- Before installing check camshaft axial clearance. Refer to Valve seats, reworking and Figure
- Oil contact surface
9 - Keepers
10 - Valve spring upper plate
11 - Valve spring
- Removing and installing, Cylinder head removed: with 2037; Cylinder head installed: Refer to Valve stem seals, replacing , Replacing valve stem seals
12 - Valve stem seal
- Replace. Refer to Valve stem seals, replacing
13 - Valve guide
- Checking. Refer to Valve guides, checking
- Replace. Refer to Valve guides, replacing
- Repair version with shoulder
14 - Cylinder head
- Reworking sealing surface. See Figure .
- Reworking valve seats. Refer to Valve seats, reworking
15 - Valves
- Do not rework, only lapping is permitted
- Valve dimensions. Refer to Valve seats, reworking