52. Cylinder Head Assemble

Cylinder Head Assemble

Special Tools

J 8062 - Valve Spring Compressor - Head Off

For equivalent regional tools, refer to Special Tools (Special Tools) .





1. Clean the cylinder head valve spring shim area.


Note

When using the valves and related components again, install the parts to their original location.

2. Install the valves (228) into the proper port. Refer to Separating Parts (Separating Parts) .
3. Install the valve stem oil seal (222).
4. Install the valve spring (223).
5. Install the valve spring cap (224).




6. Using the J 8062 - compressor , compress the valve spring.
7. Install the valve stem keys.

1. Use grease in order to hold the keys in place and remove the J 8062 - compressor .
2. Ensure the keys seat properly in the groove of the valve stem.
3. Tap the end of the valve stem with a plastic face hammer to seat the keys, if necessary.





8. Using a ruler, measure the valve spring installed height.
Measure from the base of the valve spring to the top of the valve spring.

* If the installed height exceeds 46.25 mm (1.82 in), install a valve spring shim of approximately 0.5 mm (0.02 in) thick.
* Do not shim the valve spring to obtain less than the specified height.
* Do not assemble the components without a spring shim on the cylinder head.


9. Install the remaining valves, springs, and other components.




10. Install sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the coolant temperature sensor (725).
Caution: Refer to Fastener Caution (Fastener Caution) .
11. Install the coolant temperature sensor into the left cylinder head and tighten to 20 Nm (15 lb ft) .




12. Install sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the cylinder head plug (229).
13. Install the cylinder head plug to the right cylinder head. Tighten the cylinder head plug to 20 Nm (15 lb ft) .




14. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the sides of the cylinder head plugs (216).
15. Install the cylinder head plugs into the cylinder head.
A properly installed plug should be installed 2.5 mm (0.1 in) below the end face of the head.






Note

Second design applications use a rivet type plug at the top rear coolant passage of each cylinder head.

16. Install the rivet plug into a rivet gun.




17. Insert the rivet into the coolant passage of the cylinder head.
18. Squeezing the handle of the tool, install the rivet.




19. Inspect for proper installation of the rivet (1).
A properly installed plug should be installed flush with the surface of the head.




20. Installation of the first design coolant air bleed cover (313) and bolt (312) may be used instead of the rivet plug to complete the repair.