Cylinder Head Assemble

Tools Required

• EN 46119  Off-Vehicle Valve Spring Compressor Adapter
• J 8062  Valve Spring Compressor
• J 38820  Valve Stem Seal Remover/Installer

Fig 1: Locating Oil Gallery Plugs
Courtesy of GENERAL MOTORS CORP.
1. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads.
NOTE: Refer to Fastener Notice in Cautions and Notices.
2. Install the (end) oil gallery plugs.

   Tighten:  Tighten the oil gallery plugs to 38 N.m (28 lb ft).

Fig 2: View Of Inner Oil Gallery Plug
Courtesy of GENERAL MOTORS CORP.
3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plugs.
4. Install the (inner) oil gallery plugs.
Fig 3: View Of Water Jacket Plug
Courtesy of GENERAL MOTORS CORP.
5. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plug.
6. Install the water jacket plug.
Fig 4: View Of Valve Stem Seals And Seal Tool
Courtesy of GENERAL MOTORS CORP.
7. Use J 38820  to install the valve seals. There is only one size valve seal.
Fig 5: View Of Valves
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IMPORTANT: Lubricate the valve stems with clean engine oil before installing.
8. Install the valves. 0.075 mm (0.003 in) oversized valves are available if the valve guides needed to be reamed. Use the same (original size) valve seal.
Fig 6: View Of Valve Springs & Retainers
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9. Install the valve spring and the valve spring retainer.
Fig 7: Using J 8062 & J 42037 To Compress Valve Spring
Courtesy of GENERAL MOTORS CORP.
10. Use J 8062  (2) and EN 46119  (1) to compress the valve spring.
Fig 8: View Of Valve Keys
Courtesy of GENERAL MOTORS CORP.
11. Install the valve keys.
12. Remove J 8062  and EN 46119  .
13. Install the remaining valves, springs, and other components.
Fig 9: View Of Spark Plugs
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IMPORTANT: Do not try to centralize the electrode on the spark plug. The electrode is offset by design.
14. Install the spark plugs.

    Tighten:  Tighten the spark plugs to 18 N.m (13 lb ft).

Fig 10: View Of A.I.R. Injection Pipe Cover
Courtesy of GENERAL MOTORS CORP.
15. Install the A.I.R. injection pipe gasket.
16. Install the A.I.R. injection pipe cover.
17. Install the A.I.R. injection pipe studs.

    Tighten:  Tighten the studs to 25 N.m (18 lb ft).