Hummer H3. Manual — part 117

Aligning the marked link (1) on the timing chain with the timing mark on the intake
camshaft sprocket.

2. Install the intake camshaft sprocket onto the intake camshaft.

3. Install a NEW intake camshaft sprocket bolt.

Tighten: Tighten the bolt a first pass to 20 N.m (15 lb ft). Using the J 45059 rotate the bolt
a final pass an additional 100 degrees. See Special Tools.

IMPORTANT:

To aid in aligning the sprocket to the camshaft, use a 25
mm (1 in) wrench on the hex of the camshaft to rotate

Ensure the alignment pin is properly engaged with the
camshaft

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2006 Hummer H3

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

Fig. 126: Installing 44217 & EN-44217-45 To Timing Chains
Courtesy of GENERAL MOTORS CORP.

4. Remove the J 44217 (1) and the EN-44217-45 (1). See Special Tools.

2006 Hummer H3

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

Fig. 127: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.

5. Remove the J 44221 from the camshafts. See Special Tools.

6. Install the intake CMP sensor. Refer to Camshaft Position (CMP) Sensor Replacement-

Intake in Engine Controls - 3.5L (L52).

7. Install the camshaft cover. Refer to Camshaft Cover Replacement.

TIMING CHAIN AND SPROCKETS REPLACEMENT

Tools Required

J 44221 Camshaft Holding Tool. See Special Tools.

2006 Hummer H3

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

J 45059 Angle Meter. See Special Tools.

Removal Procedure

1. Remove #1 cylinder spark plug. Refer to Spark Plug Replacement in Engine Controls -

3.5L (L52).

2. Remove the camshaft cover. Refer to Camshaft Cover Replacement.

3. Remove the exhaust camshaft position (CMP) sensor. Refer to Camshaft Position (CMP)

Sensor Replacement-Exhaust in Engine Controls - 3.5L (L52).

4. Remove the intake CMP sensor. Refer to Camshaft Position (CMP) Sensor

Replacement-Intake in Engine Controls - 3.5L (L52).

5. Remove the engine front cover. Refer to Engine Front Cover Replacement.

2006 Hummer H3

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