Cylinder head, camshafts, overview: Notes
1 - 50 Nm plus an additional 180 °
2 - Camshaft sprocket
3 - Seal
- Replacing → Sealing ring for exhaust camshaft, replacing .
4 - Cylinder head
5 - Valve guide
- Checking → Valve guides, checking
6 - Valve stem seal
7 - Valve spring
8 - Top valve spring retainer
9 - Valve keepers
10 - Hydraulic valve play balancing element
- Do not interchange
- Lubricate contact surface
11 - Fitted key
- Check for secure seat
12 - Exhaust camshaft
- Check radial clearance using Plastigage (roller cam follower removed) wear limit: 0.1 mm
- Run-out: max. 0.035 mm
13 - Bearing bracket
- With integrated camshaft bearings
- Clean sealing surface, reworking is not permitted.
- Remove old sealant residue.
14 - 8 Nm plus an additional 90 °
- Replace
15 - Camshaft adjuster
16 - 20 Nm plus an additional 45 °
- Replace
17 - Intake camshaft
- Check radial clearance using Plastigage (roller cam follower removed) wear limit: 0.1 mm
- Run-out: max. 0.035 mm
18 - Chain tensioner
- Removing → Camshaft adjuster, removing and installing Camshaft timing adjusters, removing and installing
- Before removing, secure with Locking Pin T10115
19 - Drive chain
- Check for wear
20 - 10 Nm
21 - 10 Nm
22 - Phase sensor
23 - Exhaust valve
- Do not rework, only lapping is permitted
- Valve dimensions Valve dimensions
- Check valve guides → Valve guides, checking
24 - Intake valve
- Do not rework, only lapping is permitted
- Valve dimensions Valve dimensions
- Check valve guides → Valve guides, checking
25 - Sealing cap
- Replace
- Removing: When guide frame is installed: Pierce through one side of cover with an awl and pry it out
- Installing: Without sealant press in with thrust piece 3334 1 to 2 mm deep