Chevrolet Silverado / GMC Sierra. Service manual — part 337

Fig. 368: View Of Camshaft
Courtesy of GENERAL MOTORS CORP.

2. Remove the camshaft.

1. Install the camshaft sprocket bolt into the camshaft front bolt hole.

2. Using the bolt as a handle, carefully rotate and pull the camshaft out of the engine

block.

3. Remove the bolt from the front of the camshaft.

PISTON, CONNECTING ROD, AND BEARING REMOVAL

NOTE:

All camshaft journals are the same diameter, so care must be
used in removing or installing the camshaft to avoid damage to
the camshaft bearings.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Tools Required

J 24270 Cylinder Bore Ridge Reamer. See Special Tools.

J 41556 Connecting Rod Guide. See Special Tools.

Removal

Fig. 369: Removing Cylinder Bore Ring Ridge
Courtesy of GENERAL MOTORS CORP.

1. Use the J 24270 in order to remove the cylinder bore ring ridge, if required. See Special

Tools.

1. Turn the crankshaft until the piston is at the bottom of the stroke.

2. Place a cloth on top of the piston.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

3. Use the J 24270 , or equivalent, in order to remove a cylinder ring ridge. See Special

Tools.

4. Turn the crankshaft so the piston is at the top of the stroke.

5. Remove the cloth.

6. Remove the cutting debris from the cylinder and piston.

Fig. 370: Matchmarks On Connecting Rods & Caps
Courtesy of GENERAL MOTORS CORP.

2. Using a paint stick or etching tool, place matchmarks or numbers on the connecting rods and

the connecting rod caps. The connecting rods and caps MUST be assembled to their original

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

position and direction.

A stamping mark on the side of the connecting rod, at the crankshaft journal, may
affect component geometry.

Mark the top of the piston to the specific cylinder bore.

Fig. 371: Connecting Rod Bolt, Cap & Bearing
Courtesy of GENERAL MOTORS CORP.

3. Remove the connecting rod bolts (102), cap (103) and bearing (104).

IMPORTANT: Mark, sort, or organize the connecting rod bearings so they

may be installed to their original position and location. The
connecting rods and the bearing caps are NOT
interchangeable. Refer to Separating Parts.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2