Contents: Removal ↡ Installation ↡
Removal
1. Disconnect the negative cable from the battery.
2. Drain the coolant.
3. Remove the Y20 injectors (see figure 5.25).
Figure 5.25. Cylinder head:
1. Thermostat housing,
2. Upper engine mounting bracket,
3. Bolt,
4. Cooling system pipe,
5. Nut,
6. Air intake pipe,
7. Cylinder head cover,
8. Chain tensioner,
9. Sealing ring,
10. Front cylinder head cover,
11. Upper sliding lever,
12. High pressure fuel pump,
13. Vacuum pump,
14. Fuel pump,
15. Lid.
4. Disconnect the cooling system pipes from the thermostat housing 1.
5. Disconnect the fuel lines and remove the fuel filter 16.
6. Remove the fuel filter mounting bracket 17 from the cylinder head 27 (see figure 5.26).
Figure 5.26. Cylinder head:
16. Fuel filter,
17. Fuel filter mounting bracket,
18. Exhaust manifold,
19. Intake manifold,
20. Intake camshaft,
21. Exhaust camshaft,
22. Camshaft housing,
23. Intermediate gear of high pressure fuel pump,
24. Bolt,
25. Mixing chamber with EGR valve.
7. Disconnect the wiring connectors from the coolant temperature sensor, fuel pressure sensor in the distributor and fuel pressure control valve.
8. Remove the exhaust manifold 18.
9. Remove the upper right engine bracket 2.
10. Unscrew bolt 3 securing cooling system pipe 4 to cylinder head 27.
11. Remove the intake manifold 19.
12. Unscrew nut 5 securing compressed air supply pipe 6 to cylinder head 27.
13. Remove the cylinder head cover 7.
14. Set the piston of the first cylinder to TDC. The marks on the camshaft and the camshaft bearing cap must be aligned.
15. Lock the flywheel with the lock.
16. Remove the timing chain tensioner 8.
17. Remove the front cover of the cylinder head 10.
18. Remove the upper sliding lever 11.
19. Remove camshafts 20 and 21 and camshaft housing 22.
20. Remove the high pressure fuel pump 12.
21. Remove intermediate gear 23 of high pressure fuel pump drive 12.
22. Unscrew bolts 24 securing the timing chain cover to the cylinder head 27.
23. Loosen the cylinder head mounting bolts 26 in the sequence shown in the figure 5.27 and unscrew them.
Figure 5.27. Sequence of loosening and tightening the cylinder head mounting bolts.
14. Bolts M8x90,
15. Bolts M12x102.
24. Remove the cylinder head 27. To do this, attach the lift to the eyes attached to the cylinder head (see figure 5.28).
Figure 5.28. Cylinder head:
26. Cylinder head mounting bolt,
27. Cylinder head,
28. Gasket,
29. Guide fingers.
25. Wipe the sealing surfaces and threaded holes.
Installation
26. Installation is carried out in the reverse order of removal. Replace the cylinder head gasket
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28. Make sure that the guide pins 29 for installing the cylinder head are correctly installed.
27. Lubricate the threaded holes and mating surfaces of the cylinder head bolts 26 and insert them. Tighten the cylinder head bolts in the order shown in the illustration 5.27. Tighten bolts 15 to stage 1, bolts 14 - fully, then bolts 15 to stage 2, check bolts 14, and tighten them if necessary. Tighten bolts 15 to 3rd stage.