Hummer H3. Manual — part 246

Fig. 600: Installing Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

5. Tighten the new cylinder head bolts in the following sequence:

Tighten:

1. Tighten the (12) long cylinder head bolts in sequence to 30 N.m (22 lb ft).

2. Use J 45059 to tighten the cylinder head bolts in sequence an additional 155 degrees.

See Special Tools.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2006 Hummer H3

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

3. Tighten the (2 Short) end bolts to 7 N.m (62 lb in).

Use J 45059 to tighten the short cylinder head end bolts an additional 60 degrees. See
Special Tools.

4. Tighten the (1 Long) end bolt to 7 N.m (62 lb in).

Use J 45059 to tighten the long cylinder head end bolt an additional 120 degrees. See
Special Tools.

VALVE ROCKER ARM AND VALVE LASH ADJUSTER INSTALLATION

Fig. 601: View Of Valve Lash Adjusters
Courtesy of GENERAL MOTORS CORP.

1. Lubricate and fill the valve lash adjusters with engine oil.

2006 Hummer H3

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

2. Install the valve lash adjusters in their original locations.

Fig. 602: View Of Valve Rocker Arms
Courtesy of GENERAL MOTORS CORP.

3. Lubricate the valve rocker arm.

4. Install the valve rocker arms in their original locations.

CAMSHAFT INSTALLATION

Tools Required

J 44221 Camshaft Holding Tool. See Special Tools.

2006 Hummer H3

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

Fig. 603: 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.

2006 Hummer H3

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