Installation Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

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 (1, 5).
Install the valve spring (4).
Install the valve spring cap (3).
Courtesy of GENERAL MOTORS COMPANY

Compress the valve spring using the J 38606 Valve Spring Compressor.
Install the valve keys:
- 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 Valve Spring Compressor.
- Tap the end of the valve stem with a plastic faced hammer to seat the keys (if necessary).
Courtesy of GENERAL MOTORS COMPANY

Remove J 22794 Spark Plug Port Adapter from the spark plug port.
Courtesy of GENERAL MOTORS COMPANY

CAUTION:
Refer to Fastener Caution .

Hand start the spark plug and tighten 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 .