Cylinder Head Disassemble (LDK, LHU)

Special Tools

• EN-8062  Valve Spring Compressor
• EN-36017  Valve Seal Remover
• EN-43963  Valve Spring Compressor (off car)

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

Fig 1: Intake Camshaft Position Sensor
Courtesy of GENERAL MOTORS COMPANY
1. Remove the intake camshaft position sensor (1) and bolt.
Fig 2: Valve Train Components
Courtesy of GENERAL MOTORS COMPANY
WARNING:

Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

CAUTION:

Do not compress the valve springs to less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.

NOTE:

Ensure that the valve train components are kept together and identified in order for proper installation in their original position.

2. Using the EN-8062  compressor and the EN-43963  compressor, compress the valve spring.
3. Remove the valve keys (1).
4. Slowly release the EN-8062  compressor and the EN-43963  compressor from the valve spring assembly.
5. Remove the retainers (2).
Fig 3: Valve Springs
Courtesy of GENERAL MOTORS COMPANY
6. Remove the springs (1).
Fig 4: Valve Seals
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Do not damage the valve guide. Remove any burrs that have formed at the key groove by chamfering the valve stem with an oil stone or a file.

7. Using the EN-36017  remover, remove the valve seals (1). Do not reuse the valve seals.
Fig 5: Keeping Engine Valves In Order
Courtesy of GENERAL MOTORS COMPANY
8. Remove the valves (1).
Fig 6: Cylinder Head Plugs
Courtesy of GENERAL MOTORS COMPANY
9. Remove the cylinder head plugs (1).