Hummer H3. Manual — part 108

Fig. 95: View Of Cylinder Head
Courtesy of GENERAL MOTORS CORP.

4. Install the cylinder head.

IMPORTANT: Ensure all wires, components, etc. are out of the way when

installing the cylinder head.

2006 Hummer H3

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

Fig. 96: View Of Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

5. Install NEW cylinder head bolts.

NOTE:

This component uses torque-to-yield bolts. When servicing this
component do not reuse the bolts, New torque-to-yield bolts
must be installed. Reusing used torque-to-yield bolts will not
provide proper bolt torque and clamp load. Failure to install
NEW torque-to-yield bolts may lead to engine damage.

2006 Hummer H3

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

Fig. 97: Installing Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

6. Tighten the NEW cylinder head bolts in the following sequence:

Tighten:

1. Tighten the bolts (1-12) a first pass in sequence to 30 N.m (22 lb ft). Using the J

45059 rotate the bolts (1-12) a final pass 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

2. Tighten the (2 Short) bolts (14-15) a first pass to 7 N.m (62 lb in). Using the J 45059

rotate the bolts (14-15) a final pas an additional 60 degrees. See Special Tools.

3. Tighten the (1 Long) bolt (13) a first pass to 7 N.m (62 lb in). Using the J 45059

rotate the bolt (13) a final pass an additional 120 degrees. See Special Tools.

7. Install the timing chain and sprockets. Refer to Timing Chain and Sprockets

Replacement.

8. Install the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.

CRANKSHAFT BALANCER REPLACEMENT

Tools Required

EN 46547 Flywheel Holding Tool. See Special Tools.

J 41478 Crankshaft Balancer Installer. See Special Tools.

J 41816-2 Crankshaft End Protector. See Special Tools.

J 45059 Angle Meter. See Special Tools.

Removal Procedure

1. Remove the drive belt. Refer to Drive Belt Replacement (Without A/C) or Drive Belt

Replacement (With A/C).

2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General

Information.

2006 Hummer H3

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