Cylinder head (Mercedes-Benz Vito W638)

Removal

1. Remove the chain guide 1 from the cylinder head (see figure 2.8).

Figure 2.8. Cylinder head:
1. Chain drive guide,
2. Intake manifold,
3. Cooling system pipe,
4. Exhaust system,
5. Crankcase ventilation tube,
6. Intake camshaft pulley,
7. Exhaust camshaft pulley,
8. Chain,
9. Chain tensioner,
10. Chain drive guide pin,
11. Bolts securing the chain drive cover to the cylinder head,
12. Cylinder head mounting bolts,
13. Cylinder head,
14. Gasket,
15. Guide bushings,
16, 17, 18. Additional tools.

2. Remove the intake manifold 2.

3. Disconnect the crankcase ventilation pipe 5 from the cylinder head.

(Article was obtained from the portal: «MercedesMAN»)

4. Disconnect the exhaust pipe 4 from the exhaust manifold. Replace the self-locking nut.

5. Disconnect the cooling system pipe 3 from the right side of the cylinder head.

6. Set the piston of the first cylinder to the position 20° after TDC.

7. Lock the camshafts with locking pins 16.

8. Mark the position of the toothed pulleys of camshafts 6 and 7 relative to the drive chain 8.

9. Remove the tensioner 9 of the drive chain.

10. Remove camshaft pulleys 6 and 7.

11. Remove pin 10 of the chain drive guide.

12. Unscrew bolts 11 securing the chain drive cover to the cylinder head.

13. Loosen bolts 12 securing the cylinder head. The cylinder head should only be removed when the engine is cold.

14. Check the cylinder head mounting bolts 12.

15. Remove the cylinder head 13.

16. Wipe the contact surfaces, check for wear, clean the threaded holes.