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 .

Fig 1: Identifying the Coolant Air Bleed Hose Fitting
Courtesy of GENERAL MOTORS CORP.
1. Remove the coolant air bleed hose fitting (1).
Fig 2: View of Valve Keys and Retainer
Courtesy of GENERAL MOTORS CORP.
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 re-installation in their original position.
2. Using the EN-8062:  compressor and the EN-43963:  compressor (off car), compress the valve spring.
3. Remove the valve keys (1).
4. Slowly release the EN-8062:  compressor and the EN-43963:  compressor (off car) from the valve spring assembly.
5. Remove the retainers (2).
Fig 3: View of Valve Springs
Courtesy of GENERAL MOTORS CORP.
6. Remove the springs (1).
Fig 4: View of Valve Seals
Courtesy of GENERAL MOTORS CORP.
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: View of Valves
Courtesy of GENERAL MOTORS CORP.
8. Remove the valves (1).
Fig 6: Identifying Cylinder Head Plugs
Courtesy of GENERAL MOTORS CORP.
9. Remove the cylinder head plugs (1) and oil restrictor.