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.



2. Use the J 8062 in order to compress the valve spring.




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 .



8. Remove the cylinder head expansion plugs (1), if required.



9. Remove the coolant sensor from the left cylinder head.



10. Remove the coolant plug from the right cylinder head.