Hummer H3. Manual — part 336

Fig. 199: View Of Camshaft Caps
Courtesy of GENERAL MOTORS CORP.

5. Install the camshaft caps according to the identification marks.

6. Install the camshaft cap bolts. Tighten the bolts evenly in order to compress the valve

springs before final torque.

Tighten: Tighten the bolts to 12 N.m (106 lb in).

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 200: View Of J 44222 Installed Onto Cylinder Head
Courtesy of GENERAL MOTORS CORP.

7. Carefully slide the sprockets with the timing chain from the J 44222 to the camshafts. See

Special Tools.

8. Remove the J 44222 from the cylinder head. See Special Tools.

IMPORTANT:

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

Ensure the alignment pins are properly engaged with the
camshafts

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

9. Install the new intake camshaft sprocket bolt.

10. Install the new exhaust camshaft actuator bolt.

Tighten:

1. Tighten the intake camshaft sprocket 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.

2. Tighten the exhaust camshaft sprocket bolt a first pass to 25 N.m (18 lb ft). Using the J

45059 rotate the bolt a final pass an additional 135 degrees. See Special Tools.

Fig. 201: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.

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

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

12. Install the intake CMP sensor. Refer to Camshaft Position Sensor Replacement -

Intake .

13. Install the exhaust CMP sensor. Refer to Camshaft Position Sensor Replacement -

Exhaust .

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

OIL FILTER ADAPTER REPLACEMENT

Removal Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3