Hummer H3. Manual — part 553

Fig. 230: View Of Timing Chain Tensioner & Bolts
Courtesy of GENERAL MOTORS CORP.

7. Remove the bolts (231) and timing chain tensioner (232).

8. Remove the camshaft sprocket and reposition the timing chain.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 231: Camshaft Sprocket Bolts &Retainer
Courtesy of GENERAL MOTORS CORP.

9. Remove the camshaft retainer bolts (204) and retainer (203).

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 232: View Of Camshaft
Courtesy of GENERAL MOTORS CORP.

10. Install a bolt into the camshaft.

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

12. Clean and inspect the camshaft and bearings. Refer to Camshaft and Bearings Cleaning

and Inspection.

Installation Procedure

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 H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 233: View Of Camshaft
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the camshaft journals and the bearings with clean engine oil.

2. Using the bolt as a handle, carefully install the camshaft into the engine block.

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

IMPORTANT: If camshaft replacement is required, the valve lifters must

also be replaced.

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 H3

2008 ENGINE Engine Mechanical - 5.3L - H3