Cylinder Head, Removing and Installing Cylinder Head

Cylinder head, removing and installing cylinder head

Checking compression; Refer to Compression Check, Testing and Inspection

Note:
^ When installing an exchange cylinder head with fitted camshaft, lubricate the running contact surfaces the bucket tappets and the camshaft cam surfaces before installing the cylinder head cover.
^ The plastic packing pieces for protecting the open valves must not be removed until immediately before installing the cylinder head.
^ If the cylinder head is replaced, all the coolant in the system must also be replaced.
^ Removing and installing intake manifold; Refer to Intake Manifold, Service and Repair.

Engines with steel cylinder head cover:
^ Engine code AEG

Engines with aluminum cylinder head cover.
^ Engine codes AVH, AZG, BDC, BEV, BGD





Engines with steel cylinder head cover
1. Cover
2. Seal
3. Breather housing
^ Turn to right to remove
4. 10 Nm
5. Seal
^ Replace if damaged
6. Retainer
7. Sealing plug, 15 Nm
^ Replace
8. Seal
^ Replace
9. Union
10. Lifting eye
11. 20 Nm
12. Cylinder head gasket
^ Replace
^ After replacement replace entire coolant amount
13. 15 Nm
14. Rear toothed belt guard
15. Cylinder head
^ Check for distortion; Refer to Fig 1.
^ Reworking sealing surface; Refer to Fig. 1
^ After replacement replace entire coolant amount
16. Cylinder head bolt
^ Replace
17. Oil deflector
18. Cylinder head cover gasket
^ Replace if damaged
^ Coat cylinder head/bearing cap transition points with D 454 300 A2 before installing
19. Cylinder head cover
20. Reinforcing strip
21. Rear toothed belt guard, upper part





Engines with aluminum cylinder head cover
1. Cover
2. Seal
3. 10 Nm
4. To intake manifold
^ Only engine codes BDC, BGD to Positive Crankcase Ventilation (PCV) heating element -N79
5. Shaped hose
^ Engine codes AVH, AZG through Model Year 2001
6. Shaped hose
^ Engine codes AVH, AZG from Model Year 2002
^ Engine codes BDC, BEV and BGD
^ Do not remove union between intake manifold hose and shaped hose.
7. To intake manifold upper part
^ Only Model Year from 2002
8. Seal
^ Replace
9. Sealing plug, 15 Nm
^ Replace
10. Cylinder head bolt
^ Replace
11. Connecting unions
12. 10 Nm
13. Seal
^ Replace
14. 20 Nm
15. Lifting eye
16. Cylinder head gasket
^ Replace
^ After replacement replace entire coolant amount
17. 15 Nm
18. 20 Nm
19. Rear toothed belt guard
20. Toothed belt
21. Cylinder head
^ Check for distortion
^ Reworking sealing surface; Refer to Fig. 1
^ After replacement replace entire coolant amount
22. Oil deflector
23. Cylinder head cover gasket
^ Replace if damaged
^ Coat cylinder head/bearing cap transition points with D 454 300 A2 before installing
24. Cylinder head cover
^ With cable guide





Fig. 1 Checking cylinder head for distortion
Max permissible distortion: 0.1 mm