Cylinder Head Assemble

Tools Required

• J 8062  (KM 348) Valve Spring Compressor - Head Off
• KM-653-A  Adapter

Fig 1: View Of Oiled Valve Stem And Spring Seat
Courtesy of GENERAL MOTORS CORP.
1. Coat the valve stems with engine oil.
2. Insert the valves in the cylinder head in their original positions.
3. Insert the valve spring seats.
4. Push the accompanying assembly sleeve onto the valve stem.
5. Insert the new valve stem seat.
6. Carefully drive the valve stem seal onto the stop with light taps.
7. Install the valve springs in their original positions.
8. Install the valve spring caps.
Fig 2: View Of J 8062 And KM-653-A Valve Spring Compression Tools
Courtesy of GENERAL MOTORS CORP.
CAUTION: Valve springs can be tightly compressed. Use care when removing the retainers and plugs. Personal injury could result.
9. Compress the valve springs with J 8062  (1) and adapter KM-653-A  (2).
10. Install the valve keys.
11. Remove the J 8062  (1) and the KM-653-A  (2).
Fig 3: View Of Valve Tappet Adjusters
Courtesy of GENERAL MOTORS CORP.
12. Lubricate the valve tappet adjusters with engine oil.
13. Install the valve tappet adjusters.
Fig 4: Identifying Camshaft Bearing Cap Bolt Installation Sequence
Courtesy of GENERAL MOTORS CORP.
14. Install the intake camshaft.
15. Install the intake camshaft bearing caps in their original positions.
16. Install the exhaust camshaft.
17. Install the exhaust camshaft bearing caps in their original positions.
18. Install the camshaft bearing cap bolts.
NOTE: Refer to Fastener Notice .
19. Tighten the camshaft bearing cap bolts gradually and in the sequence shown for each camshaft cap.

    Tighten:  Tighten the camshaft bearing cap bolts to 8 N.m (71 lb in)  .

Fig 5: View Of DIS Coil, EGR, Mounting Bracket And Bolts
Courtesy of GENERAL MOTORS CORP.
20. Install the spark plugs.

    Tighten:  Tighten the spark plugs to 20 N.m (15 lb ft)  .

21. Install the direct ignition system (DIS) coil and exhaust gas recirculation (EGR) mounting bracket.
22. Install the DIS coil and EGR mounting bracket bolts.

    Tighten:  Tighten the direct ignition system coil and exhaust gas recirculation mounting bracket bolts to 25 N.m (18 lb ft)  .

Fig 6: View Of Intake Manifold Retaining Bolt Installation Sequence
Courtesy of GENERAL MOTORS CORP.
23. Install the intake manifold studs.
24. Install the intake manifold gasket.
25. Install the intake manifold.
26. Install the intake manifold retaining nuts and retaining bolt in the sequence shown.

    Tighten:  Tighten the intake manifold retaining nuts and retaining bolt to 22 N.m (16 lb ft)  .

Fig 7: View Of Coolant Bypass Housing And Mounting Bolts
Courtesy of GENERAL MOTORS CORP.
27. Install the fuel rail assembly. Refer to Fuel Rail Assembly Replacement .
28. Install the thermostat housing assembly.
29. Install the thermostat housing mounting bolts.

    Tighten:  Tighten the thermostat housing mounting bolts to 15 N.m (11 lb ft)  .

30. Install the coolant bypass housing and mounting bolts.

    Tighten:  Tighten the coolant bypass housing bolts to 15 N.m (11 lb ft)  .

Fig 8: View Of Exhaust Manifold Retaining Nut Installation Sequence
Courtesy of GENERAL MOTORS CORP.
31. Install the exhaust manifold studs.
32. Install the exhaust manifold gasket.
33. Install the exhaust manifold.
34. Install the exhaust manifold retaining nuts in the sequence shown.

    Tighten:  Tighten the exhaust manifold retaining nuts to 22 N.m (16 lb ft)  .

35. Install the exhaust manifold heat shield.
36. Install the exhaust manifold heat shield bolts.

    Tighten:  Tighten the exhaust manifold heat shield bolts to 8 N.m (71 lb in)  .

37. Install the cylinder head with the intake manifold and the exhaust manifold attached. Refer to Cylinder Head Replacement .