Cylinder Head Assemble

Tools Required

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

Fig 1: Locating 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.
3. Look for the following conditions when inspecting the valve springs:
   • Expanded height
   • Unparallel spring ends
   • Spring tension using J 9666  . See Special Tools .
   • Any distorted springs should be replaced
Fig 2: Applying Prussian Blue
Courtesy of GENERAL MOTORS CORP.
4. Assemble the valves.
5. 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 inspection. The traces of Prussian blue transferred to the valve face indicates valve face concentricity.
Fig 3: View Of Valves
Courtesy of GENERAL MOTORS CORP.
6. Replace the valves, if required.
Fig 4: View Of Valve Guides
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7. Install the new valve seals. Fully seat the seals on the valve guides.
Fig 5: View Of Valve Springs
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8. Install the springs.
Fig 6: View Of Valve Train Components
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9. Install the retainer.
10. Using the J 8062  and the J 43963  , compress the valve spring. See Special Tools .
11. Install the valve keys.
12. Slowly release the J 8062  and the J 43963  from the valve/spring assembly. See Special Tools .
13. Inspect for proper valve key seating.
14. Install the remaining valves, springs, and other components.
Fig 7: View Of Intake Camshaft Position Sensor
Courtesy of GENERAL MOTORS CORP.
15. Lubricate the camshaft position sensor O-ring with clean engine oil.
16. Install the intake camshaft position sensor and bolt.

    Tighten:  Tighten the intake camshaft position sensor bolt to 10 N.m (89 lb in).