Cylinder Head Assemble

Special Tools

• EN-8062  Valve Spring Compressor
• EN-8062-5  Adapter
• EN-50717-1  Compressor Stands
• EN-50717-2  Compressor

For equivalent regional tools, refer to Special Tools .

1. Lubricate the valve stem and the valve guide with clean engine oil.
   Fig 1: Valve Stem Oil Seal And Installer

   Courtesy of GENERAL MOTORS COMPANY
2. Install the valve (5).
   NOTE: Ensure all valve train components will be installed in their original position.
3. Install the NEW valve stem oil seal (4), using the EN-958  installer (2).
4. Loosely install the valve spring (3) and the valve spring retainer (1).
5. Install the EN-8062-5  adapter (3) to the EN-8062  compressor (4).
   Fig 2: Valve Spring Compressor And Adapter Assembly

   Courtesy of GENERAL MOTORS COMPANY
6. Install the compressor assembly to the cylinder head, so that the adapter (5) of the EN-8062  compressor (1) contacts the valve spring retainer properly and the EN-8062-5  adapter (3) contacts the valve disc (2). Prefix the EN-8062  compressor (4).
7. Apply pressure to the EN-8062  compressor to push down the vale spring retainer (1) and compress the valve spring (3) until the valve keys (2) can be inserted. Carefully insert the valve keys then, so that they are proper installed to the valve stem grooves.
   Fig 3: Valve Spring Retainer And Valve Spring

   Courtesy of GENERAL MOTORS COMPANY
   CAUTION: The valve stem keys must correctly seat in the valve spring cap. Engine damage may occur by not installing properly.
8. Carefully release the tension from the EN-8062  compressor.
9. Inspect the valve keys and valve spring retainers for proper seat.
10. Remove the compressor assembly from the cylinder head.
11. Repeat the procedure with the remaining valves.