Hummer H3. Manual — part 528
Fig. 142: Cylinder Head
Courtesy of GENERAL MOTORS CORP.
9. Remove and discard the cylinder head gasket (217).
10. If required, clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and
Inspection.
Installation Procedure
CAUTION: Wear safety glasses in order to avoid eye damage.
NOTE:
Clean all dirt, debris, and coolant from the engine block cylinder
2008 Hummer H3
2008 ENGINE Engine Mechanical - 5.3L - H3
Fig. 143: Identifying Cylinder Head Locating Pins Installation Position
head bolt holes. Failure to remove all foreign material may result in
damaged threads, improperly tightened fasteners or damage to
components.
IMPORTANT:
Do not reuse the cylinder head bolts. Install NEW cylinder
head bolts during assembly.
Do not use any type of sealant on the cylinder head gasket
(unless specified).
2008 Hummer H3
2008 ENGINE Engine Mechanical - 5.3L - H3
Courtesy of GENERAL MOTORS CORP.
1. Clean the engine block cylinder head bolt holes, if required. Thread repair tool J 42385-
107, found in J 42385-200 may be used to clean the threads of old threadlocking material.
See Special Tools.
2. Spray cleaner GM P/N 12346139, P/N 12377981 (Canadian P/N 10953463), or equivalent
into the hole.
3. Clean the cylinder head bolt holes with compressed air.
4. Check the cylinder head locating pins for proper installation (a) 8.3 mm (0.327 in).
Fig. 144: Cylinder Head
Courtesy of GENERAL MOTORS CORP.
2008 Hummer H3
2008 ENGINE Engine Mechanical - 5.3L - H3
5. Install the NEW cylinder head gasket (217) onto the locating pins.
Fig. 145: Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.
6. Install the cylinder head (218) onto the locating pins.
7. Install the NEW cylinder head bolts (220, 221).
IMPORTANT: When properly installed, with FRONT on the right side, the
tab on the cylinder head gasket should be located right of
center.
2008 Hummer H3
2008 ENGINE Engine Mechanical - 5.3L - H3
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