Hummer H3. Manual — part 333

1. Position the upper timing chain guide to the cylinder head.

2. Apply threadlock to the upper timing chain guide bolt threads. Refer to Sealers, Adhesives

and Lubricants.

3. Install the upper timing chain guide bolts.

Tighten: Tighten the bolts to 10 N.m (89 lb in).

4. Install the camshaft cover. Refer to Camshaft Cover Replacement.

TIMING CHAIN GUIDE REPLACEMENT - LOWER

Removal Procedure

1. Remove the timing chain tensioner shoe. Refer to Timing Chain Tensioner Shoe

Replacement.

2. Slide the crankshaft sprocket from the crankshaft sprocket snout, in order to gain slack in

the timing chain to remove the lower timing chain guide.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 189: View Of Cylinder Head Access Hole Plugs
Courtesy of GENERAL MOTORS CORP.

3. Remove the cylinder head access hole plug.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 190: View Of Timing Chain Guide & Bolts
Courtesy of GENERAL MOTORS CORP.

4. Remove the lower timing chain guide bolts.

5. Remove the lower timing chain guide from the engine.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 191: View Of Timing Chain Guide & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Position the lower timing chain guide to the engine.

2. Install the lower timing chain guide bolts.

Tighten: Tighten the bolts to 18 N.m (13 lb ft).

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3