Hummer H3. Manual — part 332
Fig. 185: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.
5. Remove the J 44221 from the camshafts. See Special Tools.
2007 Hummer H3
2007 ENGINE Engine Mechanical - 3.7L - H3
Fig. 186: Identifying Chain Alignment Links
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Every 7th link of the timing chain is darkened to aid in
aligning the timing marks.
2007 Hummer H3
2007 ENGINE Engine Mechanical - 3.7L - H3
6. Align the marked links (1) of the timing chain with the timing marks on the following:
The exhaust camshaft position actuator sprocket
The Intake camshaft sprocket
The crankshaft sprocket
7. Install the engine front cover. Refer to Engine Front Cover Replacement.
8. Install the camshaft cover. Refer to Camshaft Cover Replacement.
TIMING CHAIN GUIDE REPLACEMENT - UPPER
Removal Procedure
2007 Hummer H3
2007 ENGINE Engine Mechanical - 3.7L - H3
Fig. 187: View Of Upper Timing Chain Guide
Courtesy of GENERAL MOTORS CORP.
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement.
2. Remove the upper timing chain guide bolts.
3. Remove the upper timing chain guide from the cylinder head.
Installation Procedure
Fig. 188: View Of Upper Timing Chain Guide
Courtesy of GENERAL MOTORS CORP.
2007 Hummer H3
2007 ENGINE Engine Mechanical - 3.7L - H3
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