2. Install the cylinder head on the disassembly stand (Mot. 1573).
3. Loosen the nuts (1) securing the fuel rail guard
4. Remove the fuel rail protection.
5. Clean the high pressure fuel line connections.
6. Remove the high-pressure fuel lines between the high-pressure fuel pump and the fuel rail (see chapter "Power supply system").
7. Remove the high-pressure fuel pump (see chapter "Power supply system").
8. Remove the fuel rail (see chapter "Power supply system").
9. Remove the glow plugs (see chapter "Engine electrical equipment").
10. Remove the vacuum pump.
11. Remove the cooling system chamber (see chapter "Cooling system").
12. Remove the exhaust gas temperature sensor.
13. Remove the EGR components.
14. Remove the exhaust manifold.
15. Remove the camshaft oil seal from the drive side (see below).
16. Remove the camshaft (see below).
Note: It is necessary to mark the valve lifters relative to the cylinders with a marker.
17. Remove the valve lifters.
18. Remove the valves from the cylinder head:
- Place the valve spring compressor (Mot. 1849) on the valve as shown in the figure.
- Compress the valve spring.
- Using a magnetized rod or tweezers, remove the valve crackers (4)
- Release the valve spring and remove the valve spring compressor from the cylinder head.
- Remove the valve plate and valve spring.
- Remove the valve from the cylinder head
- Remove the remaining valves from the cylinder head in a similar manner.
19. Remove the valve stem seals:
Note: Before removing the valve stem seal, it is important to mark the dimension (H) of the old valve stem seals on the intake and exhaust sides (the installation size of the inlet and outlet caps may differ).
- Install the valve to mark the installation dimension (H) of the old valve stem seal with the lower spring retaining washer using the valve stem seal installation tool (Mot. 1759) or valve stem seal installation kit.
Note: It is recommended to use a pressing tool to measure the installation dimension (H) of the oil seal (Mot. 1511-01) (5).
- Install the mandrel (7) onto the oil deflector cap.
Note: The inside diameter of the mandrel must be identical to the valve diameter so that the bottom of the mandrel covers the metal top section of the valve stem seal.
- Install the guide tube (9) over the mandrel so that the tube touches the cylinder head.
- Insert the sleeve (10) into the guide tube until it contacts the mandrel.
- Secure the sleeve with the fixing screw (11).
- Remove the guide tube and bushing assembly, being careful not to loosen the retaining screw.
- Remove the valve.
- Remove the valve stem seals using special pliers (Mot. 1335) (12).
Note: The following operation is only performed if the cylinder head is replaced.
20. Loosen the bolts (4) and remove the lifting eye (5) from the cylinder head.
