Hummer H3. Manual — part 452

Fig. 628: View Of Camshafts
Courtesy of GENERAL MOTORS CORP.

1. Coat the camshaft journals, camshaft journal thrust face and camshaft lobes with clean

engine oil.

2. Install the exhaust camshaft.

3. Install the intake camshaft.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 629: Installing J 44221 To Camshafts
Courtesy of GENERAL MOTORS CORP.

4. Install J 44221 with the camshaft flats up and the number 1 cylinder at top dead center. See

Special Tools.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 630: View Of Camshaft Caps
Courtesy of GENERAL MOTORS CORP.

5. Install the exhaust camshaft caps.

6. Install the intake camshaft caps.

IMPORTANT: Install the same camshaft cap onto the same camshaft

journal from which it was removed. The camshaft caps are
pin stamped for direction and numerical order.

NOTE:

Refer to FASTENER NOTICE .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

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

springs before final torque.

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

8. Remove J 44221 . See Special Tools.

ENGINE LIFT BRACKET INSTALLATION

Fig. 631: Installing Engine Lift Bracket
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3