Installation Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Cylinder Head Components

Courtesy of GENERAL MOTORS CORP.

Clean the cylinder head valve spring seat and/or shim area.
Lubricate the valve guide and valve stem oil seal with clean engine oil.
Install the valve stem oil seal and shim (222) assembly.
Install the valve spring (223).
Install the valve spring cap (224).

Fig 2: Compress The Valve Spring (Cylinder Head Installed) Using Special Tools

Courtesy of GENERAL MOTORS CORP.

Compress the valve spring using the J 38606 . See Special Tools .
Install the valve stem keys (225).
- Use grease in order to hold the valve keys in place.
- Make sure the keys seat properly in the groove of the valve stem.
- Carefully release the valve spring pressure, making sure the valve keys stay in place.
- Remove the J 38606 . See Special Tools .
- Tap the end of the valve stem with a plastic faced hammer to seat the keys (if necessary).

Fig 3: View Of J 22794

Courtesy of GENERAL MOTORS CORP.

Remove J 22794 from the spark plug port. See Special Tools .

Fig 4: View Of Spark Plug And Sparkplug Seat

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

Hand start the spark plug.
Tighten: Tighten the spark plug to 15 N.m (11 lb ft).
Install the spark plug wires at the ignition coil.
Install the spark plug wire to the spark plug.
Inspect the wires for proper installation:
- Push sideways on each boot in order to check for proper installation.
- Reinstall any loose boot.
Install the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement .