Hummer H3. Manual — part 203

4. Inspect the valve lash adjusters for the following conditions:

Excessive wear

Clogging of the oil passage

Damage

Collapsed or spongy

CYLINDER HEAD DISASSEMBLE

Tools Required

J 8062 Valve Spring Compressor. See Special Tools.

J 42037 Valve Spring Compressor Adapter. See Special Tools.

J 38820 Valve Stem Seal Remover/Installer. See Special Tools.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 437: Installing Spark Plugs
Courtesy of GENERAL MOTORS CORP.

1. Remove the spark plugs.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 438: View Of A.I.R. Injection Pipe Cover
Courtesy of GENERAL MOTORS CORP.

2. Remove the A.I.R. injection pipe cover studs.

3. Remove the A.I.R. injection pipe cover and gasket.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 439: Using J 8062 & J 42037 To Compress Valve Spring
Courtesy of GENERAL MOTORS CORP.

4. Use J 8062 (2) and J 42037 (1) to compress the valve spring. See Special Tools.

IMPORTANT: Organize the valve train components when disassembling so

they can be reassembled in the same location and matched
up with the same components as previously installed.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3