Preparing to remove the cylinder head of the 612 series engine
Preparing to remove the cylinder head of the 612 series engine
Removing the cylinder head of the 612 series engine
1. Illustrative material on the removal and installation of the cylinder head of the 612 series engine is presented in the illustrations, to which all references in the text refer.
2. Open the hood and fix it in a vertical position.
3. Disconnect the negative cable from the battery.
4. Remove the lower section of sound insulation.
5. Drain the cooling system (see Chapter Checking the cooling system and frost resistance of the coolant, replacing the liquid).
6. Remove the cylinder head cover trim panels (1 and 2).
7. Remove the air cleaner (see Chapter Servicing air intake tract components).
8. Disconnect the cooling system hoses from the thermostat.
9. Disconnect the inlet hose (4/2) from the turbocharger (110).
10. Disconnect the vacuum hose (3) of the vacuum unit (110/10) of the turbocharger (110).
11. Remove the expansion tank of the cooling system (see Chapter Cooling, heating and air conditioning systems) and, without disconnecting the hoses, move it to the side.
12. Remove the injectors (Y76).
13. Remove the cylinder head cover (6).
14. Turning the crankshaft in the normal direction, bring the engine to the TDC position of the piston of the first cylinder - the marks on the camshaft bodies and bearing caps should align (arrows).
15. Using a special tool, lock the flywheel ring gear.
16. Remove the chain tensioner (4) (see Section Removal and installation of timing drive components).
17. Remove the front cover (7) of the cylinder head (see Section Removal and installation timing belt covers).
18. Remove the upper chain guide (8) (see Section Removal and installation of timing drive components).
19. Remove the camshafts (9 and 10) (see Section Removal and installation of timing components).
20. Remove the camshaft bed (11).
21. Remove the intermediate sprocket (24).
22. Disconnect the pressure line (19/1) from the high-pressure fuel pump (19).
23. Remove the return line laid between the fuel injection pump and the fuel line.
24. Remove the fuel injection pump (19).
25. Disconnect the electrical wiring connectors on the cylinder head.
26. Remove the main fuel filter (70).
27. Remove the air distribution sleeve (110/1).
28. Unbolt the guide tube brackets (22 and 23) from the cylinder head.
29. Disconnect the primary catalytic converter (120/1) from the turbocharger (110).
30. Disconnect the air hose (110/6) and oil return pipe (110/4) from the turbocharger (11).
31. Remove the bolts (14) securing the cylinder head to the timing drive cover.
32. Loosen the head mounting bolts (15) in several stages.
33. Unscrew the bolts (15) and check their condition.
34. Carefully clean the mating surfaces of the cylinder head and block and the threaded holes in the block.
35. Installation is carried out in the reverse order - a new sealing gasket (18) is placed on the surface of the block mating with the head. Make sure that the guide bushings (20) are installed correctly.
36. Finally, start the engine and check for signs of developing leaks. Also clear the memory of the on-board diagnostic module (see Chapter Engine electrical systems).
M628
Preparing to remove the left cylinder head of the 628 series engine
1 - Electrical wiring connector; 2 - Turbocharger oil return pipe; 3 - Turbocharger support bracket
Preparing to remove the left cylinder head of the 628 series engine
4 - Chain guide bearing pins; 5 - Chain guides
Removal the left cylinder head of the 628 series engine
5 - Chain guides; 6 - Bolts; 7 - Head mounting bolts; 8 - Lifting rigging
1. Illustrative material on removing and installing cylinder heads (on the example of the left) the 628 series engine is shown in the illustrations to which all references in the text refer.
2. Remove the EGR cooler.
3. Remove the cylinder head covers.
4. Remove the chain tensioner (see Section Removal and installation of timing drive components).
Right head
1. Remove the air intake hose from the boost tract.
2. Remove the lower sleeve of the air boost tract.
3. Remove the intermediate sprocket of the fuel injection pump (see Section Removal and installation of timing drive components).
4. Remove the camshaft bed (see Section Removal and installation of timing components).
5. Release the fastener and pull back the right three-way catalytic converter (TWC).
6. Disconnect the electrical wiring from the right turbocharger (1).
7. Disconnect the oil return pipe (2) from the right turbocharger - the sealing elements of the pipe must be replaced without fail.
8. Remove the support bracket (3) of the right turbocharger.
Left head
1. Perform the procedures in the previous order of execution, adjusting for the binding of components to your head.
2. Remove the oil filter housing.
3. Mark the position of the timing chain on the camshaft drive sprocket.
4. Remove the drive sprocket from the exhaust camshaft journal.
5. Using a suitable extractor, remove the chain guide pins (4).
6. Tie the guides (5) to each other.
Both heads
1. Disconnect the electrical wiring from the glow plugs.
2. Unscrew the bolts (6) securing the head.
3. In several stages, loosen and then unscrew the head mounting bolts (7).
4. Check the condition of the bolts (7), replace them if necessary.
5. Connect the lifting chains (8) and use a winch to remove the head from the cylinder block.
6. Carefully clean the mating surfaces of the cylinder head and block and the threaded holes in the block.
7. Installation is carried out in the reverse order - a new sealing gasket (18) is placed on the surface of the block mating with the head. Make sure that the guide bushings (20) are installed correctly.
8. Finally, start the engine and check for signs of developing leaks. Also clear the memory of the on-board diagnostic module (see Chapter Engine electrical systems).