Chevrolet Silverado / GMC Sierra. Manual - part 265
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.
2008 Hummer H2
2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 107: View Of J 22794
Courtesy of GENERAL MOTORS CORP.
8. Remove J 22794 from the spark plug port. See Special Tools.
Fig. 108: View Of Spark Plug And Sparkplug Seat
Courtesy of GENERAL MOTORS CORP.
9. Hand start the spark plug.
Tighten: Tighten the spark plug to 15 N.m (11 lb ft).
10. Install the spark plug wires at the ignition coil.
11. Install the spark plug wire to the spark plug.
12. Inspect the wires for proper installation:
Push sideways on each boot in order to check for proper installation.
Reinstall any loose boot.
13. Install the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement.
NOTE:
Refer to Fastener Notice .
2008 Hummer H2
2008 ENGINE Engine Mechanical - 6.2L - H2
OIL LEVEL INDICATOR AND TUBE REPLACEMENT
Removal Procedure
Fig. 109: View Of Oil Level Indicator
Courtesy of GENERAL MOTORS CORP.
1. Remove the oil level indicator from the tube.
2008 Hummer H2
2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 110: View Of Oil Level Indicator Tube & Bolt
Courtesy of GENERAL MOTORS CORP.
2. Remove the oil level indicator tube bolt.
3. Remove the oil level indicator tube from the engine block.
4. Inspect the O-ring seal for cuts or damage.
IMPORTANT: The O-ring seal may be reused if not cut or damaged.
2008 Hummer H2
2008 ENGINE Engine Mechanical - 6.2L - H2