Cylinder Head Assemble

Tools Required

• J 8062  Valve Spring Compressor. See Special Tools .
• J 9666  Valve Spring Tester
• J 43963  Valve Spring Compressor (off car). See Special Tools .

Fig 1: View Of Cylinder Head Plugs
Courtesy of GENERAL MOTORS CORP.
NOTE: In order to avoid damage, install the spark plugs after the cylinder head has been installed on the engine.
1. Install NEW cylinder head plugs. Coat the plugs with sealer GM P/N 12345382 (Canadian P/N 10953489) or equivalent.
2. Inspect the valve springs for the following conditions:
   • Expanded height
   • Unparallel spring ends
   • Spring tension using J 9666 
   • Any distorted springs should be replaced
Fig 2: Applying Prussian Blue To Valve Seat & Face
Courtesy of GENERAL MOTORS CORP.
3. Assemble the valves.
4. Use the following steps to measure valve runout:
   1. Apply a dab of Prussian blue on the entire valve face. Seat the valve but do not rotate it. The Prussian blue traces transferred to the valve seat are an indication of concentricity of the valve seat.
   2. Clean all traces of Prussian blue.
   3. Apply a dab of Prussian blue on the valve seat and repeat the check. The traces of Prussian blue transferred to the valve face indicates valve face concentricity.
Fig 3: Identifying Engine Valves
Courtesy of GENERAL MOTORS CORP.
5. Replace the valves, if required.
Fig 4: Identifying Valve Seals
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6. Install the new valve seals. Fully seat the seals on the valve guides.
Fig 5: View Of Valve Springs
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7. Install the spring.
Fig 6: Identifying Valve Spring Retainers
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8. Install the retainer.
9. Using the J 8062  and the J 43963  , compress the valve spring. See Special Tools .
10. Install the valve keys.
11. Slowly release the J 8062  and the J 43963  from the valve/spring assembly. See Special Tools .
12. Inspect for proper valve key seating.
13. Install the remaining valves, springs, and other components.
Fig 7: Identifying Cylinder Head Air Bleed Tube
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice .
14. Install the cylinder head air bleed tube.

    Tighten:  Tighten the tube to 15 N.m (133 lb in).