Valve gear, assembly overview: Notes
WARNING: This page is about a different variant/trim than selected.
NOTE:
- Cylinder heads with cracks between the valve seats may be used without reducing engine life, provided the cracks are short and not more than 0.5 mm wide.
1 - 20 Nm plus an additional 14 turn (90 ° )
- Replace
- Note sequence when loosening and tightening. Refer to Camshaft, removing and installing
2 - Rocker arm shaft
- Do not interchange
3 - Cylinder head bolt
- Note sequence when loosening and tightening. Refer to Cylinder head, removing and installing
4 - Washer
- For cylinder head bolts
- Position in cylinder head before installing bearing caps.
5 - Hydraulic lifter
- Do not interchange
- With hydraulic valve clearance compensation
- Store with cam contact surface downward
- Before installing check camshaft axial clearance
- Oil contact surfaces
- Before removing, remove camshaft bearing caps
6 - Keepers
7 - Valve spring plate
8 - Outer valve spring
- Removing and installing: Cylinder head removed: with 2037; Cylinder head installed: Refer to Valve stem seals, replacing
9 - Inner valve spring
- Removing and installing: Cylinder head removed: with 2037; installed: Refer to Valve stem seals, replacing
10 - Valve stem seal
- Replacing, refer to Valve stem seals, replacing
11 - Valve guide
- Checking, refer to Valve guides, checking
12 - Unit injector
- Removing and installing. Refer to Unit injector, removing and installing
13 - Cylinder head
- See note, refer to Valvetrain, assembly overview
14 - Seal
- Do not additionally oil or grease oil seal sealing lip
- Before installing, remove oil remains from camshaft journals with a clean cloth
- To install, tape over (e.g. with cellophane tape) groove in taper of camshaft
- Removing and installing. Refer to Camshaft oil seal, removing and installing
15 - Valves
- Valve dimensions
16 - Bearing shell
- Do not interchange used bearing shells (mark)
- Ensure proper seating of retaining lugs in bearing caps and cylinder head
17 - Camshaft
- Checking axial clearance
- Removing and installing. Refer to Camshaft, removing and installing
- Check radial clearance with Plastigage, wear limit: 0.11 mm
- Run-out: max. 0.01 mm
- Identification and valve timing
18 - Bearing cap
- Installation sequence. Refer to Camshaft, removing and installing
- To install, seal parting surfaces of bearing caps 1 and 5 with AMV 174 004 01
19 - 8 Nm plus an additional 14 turn (90 ° )
- Replace