Cylinder Head Disassemble

Tools Required 

J 8062  Valve Spring Compressor

Important:  Remove the spark plugs from the cylinder head with the components at room temperature.

Mark, organize, or sort the cylinder head components for assembly. Return the components to their original location during assembly.

Do not remove the cylinder head expansion plugs (7) or valve seats (8 and 11) unless service is required.

1. Remove the spark plugs from the cylinder heads.
   Fig 1: Identifying Cylinder Head Components

   Courtesy of GENERAL MOTORS CORP.
2. Use the J 8062  in order to compress the valve spring.
   Fig 2: Compressing Valve Spring

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   Important:  Early design LS6 applications use a copper plated spring shim. A shim of the same design must be installed during assembly.

3. Remove the valve stem keys (2).
4. Remove the valve spring cap (3).
5. Remove the valve spring (4).
6. Remove the valves (9 and 10).
7. Remove the valve stem oil seal and shim assembly (5). Refer to SEPARATING PARTS  .
   Fig 3: Identifying Cylinder Head Components

   Courtesy of GENERAL MOTORS CORP.
8. Remove the cylinder head expansion plugs (1), if required.
   Fig 4: Removing Cylinder Head Expansion Plugs

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9. Remove the coolant sensor from the left cylinder head.
   Fig 5: Removing Coolant Sensor From Left Cylinder Head

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10. Remove the coolant plug from the right cylinder head.
    Fig 6: Removing Coolant Plug From Right Cylinder Head

    Courtesy of GENERAL MOTORS CORP.