Cylinder Head Disassemble

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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 (9), aluminum heads only, unless service is required.

Do not attempt to replace worn valve guides (8). Worn valve guides should be reamed and sleeved for proper clearance to the valve stem.

A second design valve stem oil seal and shim assembly may be used on later engines.

A separate spring shim is not required with the second design seal and shim assembly.

Remove the spark plugs from the cylinder heads.

Fig 1: Valve Components
Courtesy of GENERAL MOTORS CORP.
Use the J 8062 in order to compress the valve spring.

Fig 2: Compressing Valve Spring Using J 8062
Courtesy of GENERAL MOTORS CORP.
Remove the valve stem keys (3).
Remove the valve spring cap (4).
Remove the valve spring (5).
Remove the valves (11 and 13).
Remove the valve stem oil seal (6), first design.
Remove the valve spring shim (7), first design.
Remove the valve stem oil seal and shim assembly, second design. Refer to Separating Parts .

Fig 3: Valve Components
Courtesy of GENERAL MOTORS CORP.
Remove the cylinder head expansion plugs (1), if required.

Fig 4: Cylinder Head Expansion Plug
Courtesy of GENERAL MOTORS CORP.
Remove the coolant sensor from the left cylinder head, if required.

Fig 5: Coolant Sensor (Left Cylinder Head)
Courtesy of GENERAL MOTORS CORP.
Remove the coolant plug from the right cylinder head, if required.

Fig 6: Coolant Plug (Right Cylinder Head)
Courtesy of GENERAL MOTORS CORP.