Hummer H2. Manual — part 1743
Installation Procedure
Fig. 166: Sealant Applied To Front Oil Pan-To-Engine Block Junction
IMPORTANT:
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The alignment of the structural oil pan is critical. The rear bolt hole
locations of the oil pan provide mounting points for the transmission
bellhousing. To ensure the rigidity of the powertrain and correct
transmission alignment, it is important that the rear of the block and the
rear of the oil pan must NEVER protrude beyond the engine block and
transmission bellhousing plane.
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Do not reuse the oil pan gasket.
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It is not necessary to rivet the NEW gasket to the oil pan.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
Courtesy of GENERAL MOTORS CORP.
1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the
engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil
pan surface.
Fig. 167: Sealant Applied To Rear Oil Pan-To-Engine Block Junction
Courtesy of GENERAL MOTORS CORP.
2. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.8 in) long to the
engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil
pan surface.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
Fig. 168: View Of Oil Pan
Courtesy of GENERAL MOTORS CORP.
3. Pre-assemble the oil pan gasket to the pan.
IMPORTANT: Be sure to align the oil gallery passages in the oil pan and engine block
properly with the oil pan gasket.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
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Install the gasket onto the pan.
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Install the oil pan bolts to the pan and through the gasket.
4. Install the oil pan, gasket and bolts to the engine block.
5. Tighten the oil pan bolts until snug. Do not overtighten.
Fig. 169: Identifying Stud & Bolt Securing Transmission To Engine
Courtesy of GENERAL MOTORS CORP.
6. Install the transmission bolt and stud on the right side until snug.
2004 Hummer H2
2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
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