Cylinder Head Disassemble

WARNING: This page is about a different variant/trim than selected.

Special Tools

EN-8062 Valve Spring Compressor - Head Off
EN-46116 Valve Stem Seal Remover/Installer
EN-46117 Valve Stem Key Remover/Installer
EN-46119 Off-Vehicle Valve Spring Compressor Adapter

Equivalent regional tools: Special Tools

Courtesy of GENERAL MOTORS COMPANY

NOTE:
Ensure valve heads will not contact anything during the following step in order to avoid bending or damage.

Using an appropriately sized deep socket and a plastic hammer, lightly tap on the valve spring retainer to loosen the valve keepers.
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.

Compress the valve spring using the EN-8062 Valve Spring Compressor - Head Off and the EN-46119 Off-Vehicle Valve Spring Compressor Adapter.
Courtesy of GENERAL MOTORS COMPANY

Use the magnet of the EN-46117 Valve Stem Key Remover/Installer in order to remove the valve keepers (1).
Remove the valve spring compressor and the adapter.
Courtesy of GENERAL MOTORS COMPANY

Remove the valve spring retainer (1).
Remove the valve spring (2).
Courtesy of GENERAL MOTORS COMPANY

Remove the valves (1 and 2).
Courtesy of GENERAL MOTORS COMPANY

NOTE:
NEVER reuse a valve stem oil seal.

Remove the valve stem oil seal (1) using the EN-46116 Valve Stem Seal Remover/Installer and discard.
Repeat these procedures for the remaining valves.