Cylinder Head Assemble

Special Tools 

J-8062  Valve Spring Compressor - Head Off

Equivalent regional tools: Special Tools 

Fig 1: Valve, Stem Keys, Valve Spring Cap And Valve Spring
Courtesy of GENERAL MOTORS COMPANY
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 
3. Install a NEW valve stem oil seal (222).
4. Install the valve spring (223).
5. Install the valve spring cap (224).
Fig 2: Compressing Valve Spring
Courtesy of GENERAL MOTORS COMPANY
6. Using the J-8062  spring 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  spring 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.
Fig 3: Measuring Valve Spring Installed Height
Courtesy of GENERAL MOTORS COMPANY
8. After installation, measure the valve spring installed height.

   Measure from the base of the valve spring to the top of the valve spring. If the spring installed height is not within specification, the valve and/or cylinder head must be replaced. Refer to Engine Mechanical Specifications (RPO L96 VIN G) 

9. Install the remaining valves, springs, and other components.
Fig 4: Coolant Temperature Sensor
Courtesy of GENERAL MOTORS COMPANY
10. Install sealant to the threads of the coolant temperature sensor (725). Refer to Adhesives, Fluids, Lubricants, and Sealers 
CAUTION:

Refer to Fastener Caution

11. Install the coolant temperature sensor into the left cylinder head and tighten to 20 N.m (15 lb ft).
Fig 5: Cylinder Head Plug
Courtesy of GENERAL MOTORS COMPANY
12. Install sealant to the threads of the cylinder head plug (229). Refer to Adhesives, Fluids, Lubricants, and Sealers 
13. Install the cylinder head plug to the right cylinder head and tighten to 20 N.m (15 lb ft).
Fig 6: Cylinder Head Core Hole Plug
Courtesy of GENERAL MOTORS COMPANY
14. Apply threadlock to the sides of the cylinder head plugs (216). Refer to Adhesives, Fluids, Lubricants, and Sealers 
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.

Fig 7: Rivet Plug
Courtesy of GENERAL MOTORS COMPANY
16. Install the rivet plug (1) into a rivet gun.
Fig 8: Installing Rivet
Courtesy of GENERAL MOTORS COMPANY
17. Insert the rivet into the coolant passage of the cylinder head.
18. Squeezing the handle of the tool, install the rivet.
Fig 9: Correct Rivet-Type Plug Installation
Courtesy of GENERAL MOTORS COMPANY
19. Inspect for proper installation of the rivet (1).

    A properly installed plug should be installed flush with the surface of the head.

Fig 10: Engine Coolant Air Bleed Cover, Bolts And Seals
Courtesy of GENERAL MOTORS COMPANY
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. Tighten the coolant air bleed bolts to 12 N.m (106 lb in).