Hummer H3. Manual — part 211

10. Inspect the pressure regulator valve spring for loss of tension or bending. Replace the

pressure regulator spring if damaged.

11. Inspect the oil pump pipe pickup tube and screen assembly for the following conditions:

Looseness - If the oil pump pipe pickup tube is loose or bent, replace the oil pump
pipe pickup tube.

Broken wire mesh or screen

Inspect the O-ring seal at the base of the oil pump pickup tube for damage.

OIL PAN CLEANING AND INSPECTION

Fig. 466: Inspecting Oil Pan
Courtesy of GENERAL MOTORS CORP.

1. Clean the oil pan in solvent. Remove all sludge and debris from the oil pan.

IMPORTANT: Do not use a motorized tool or bristle disc to clean this

component.

2006 Hummer H3

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

2. Remove all sealing material from the oil pan rails.

3. Inspect the oil pan sealing surfaces for nicks or damage. Remove any minor nicks with a fine

flat file.

4. Inspect the threads in the oil drain plug hole.

5. Replace the oil pan if necessary.

ENGINE FRONT COVER CLEANING AND INSPECTION

2006 Hummer H3

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

Fig. 467: Inspecting Engine Front Cover
Courtesy of GENERAL MOTORS CORP.

1. Clean the engine front cover with cleaning solvent.

IMPORTANT: Do not use a motorized tool or bristle disc to clean this

2006 Hummer H3

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

2. Remove all sealing material.

3. Inspect the engine front cover sealing surfaces for nicks or damage. Use a fine flat file to

remove any minor nicks.

4. Inspect the engine front cover threaded holes for damage.

5. Repair or replace the engine front cover as necessary.

INTAKE MANIFOLD CLEANING AND INSPECTION

Fig. 468: Inspecting Intake Manifold
Courtesy of GENERAL MOTORS CORP.

1. Clean the intake manifold gasket mating surface.

component.

2006 Hummer H3

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