Hummer H1 (2006+). Manual - part 176

3-46 Fuel, Emissions, and Exhaust

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AIR CLEANER SERVICE

Removal

1.

Remove the filter element (Figure 3-30).

2.

Loosen the clamp and disconnect the air induction hose from the engine side of the air cleaner assembly.

3.

Loosen the clamp and disconnect the CTIS inlet hose from the fitting on the air cleaner assembly.

4.

Remove the central vent line from the fitting on the air cleaner assembly.

5.

Remove the three screws holding the weathercap cover to the air intake duct.

6.

Remove the three bolts and washers holding the air intake duct to the air intake support.

7.

Remove the air intake duct and gasket.

8.

Reaching through the air intake duct opening loosen the clamp holding the intake elbow to the air cleaner assembly and
remove the intake elbow.

9.

Loosen the two strap clamps from around the air cleaner assembly and remove them from each end.

10. Remove the air cleaner assembly.

Cleaning and Inspection 

Replace the air filter if it is plugged or saturated with dirt. Clean the hose and the dust unloader with a shop towel. Clean the other
components with solvent and examine for wear or damage. Replace the worn or damaged parts if necessary.

Installation

1.

Install the intake elbow and the clamp on the air cleaner assembly. Do not tighten the clamp at this time.

2.

Position the air cleaner assembly on the air intake support and align the elbow with the top of the support.

3.

Tighten the clamp on the elbow to 45-53 lb-in. (5-6 N•m). 

4.

Position the air cleaner assembly and the strap clamps on the support brackets and tighten the clamps to 45-53 lb-in. (5-
6 N•m). 

5.

Install the air intake duct and gasket to the air intake support and secure with three bolts and washers.

6.

Install the weathercap and secure with three screws.

7.

Connect the CTIS inlet hose to the fitting on the air cleaner and secure with the clamp.

8.

Install the central vent line to the fitting on the air cleaner assembly.

9.

Install the air induction hose to the engine side of the air cleaner assembly tighten clamp to 45-53 lb-in. (5-6 N•m).

10. Install the filter element.

11. If using a new canister, install new emissions labels on the canister in their original positions.

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 Fuel, Emissions, and Exhaust  3-47

Figure 3-30:   Air Cleaner Assembly and Dust Unloader

WEATHERCAP

AIR CLEANER

ASSEMBLY

VENT

DUST UNLOADER

ELBOW

GASKET

FITTING

AIR INDUCTION

HOSE

MASS AIR

FLOW SENSOR

 FILTER

GASKET

SEAL

 ELEMENT

CLAMP

GASKET

AIR INTAKE

SUPPORT

INTAKE

AIR INTAKE

DUCT

NUT-WASHER

ASSEMBLY

3-48 Fuel, Emissions, and Exhaust

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Air Cleaner Filter Element Service 

Removal

1.

Remove the nut-washer assembly and the seal securing the cover to the air cleaner assembly (Figure 3-31).

2.

Remove the cover and gasket from the air cleaner assembly.

3.

Remove the nut-washer assembly securing the filter element to the stud and pull the filter element out from the air cleaner
assembly.

Figure 3-31:   Air Cleaner Filter Element Removal/Installation 

Inspection/Cleaning

1.

Clean the components with compressed air, examine for wear or damage and replace if necessary.

2.

Remove the dirt and dust from the air filter element by gently tapping around the air filter element and directing flow of
compressed air from the inside to the outside of the filter element. 

Installation

1.

Slide the air filter element onto the air cleaner stud and install the seal and the nut-washer assembly and tighten to 18-35 lb-in.
(2-4 N•m) (Figure 3-31).

AIR CLEANER 

FILTER 

COVER

NUT-WASHER ASSEMBLY

STUD

ASSEMBLY

ELEMENT

NUT-WASHER ASSEMBLY

GASKET

SEAL

SEAL

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 Fuel, Emissions, and Exhaust  3-49

2.

Install the cover, gasket and the seal onto the air cleaner assembly and tighten the nut-washer assembly to 18-35 lb-in.

AIR HORN

Removal

1.

Loosen the clamp and the remove air induction hose from the air horn.

2.

Remove the PCV hose and pipe assembly from the air horn.

3.

Loosen the clamp that secures the air horn to the turbo charger inlet.

4.

Remove the air horn.

5.

Cover the turbo charger opening to prevent any dirt entry.

Installation

1.

Install the air horn on the turbo charger inlet and torque the clamp to 41 lb-in. (4.6 N·m).

2.

Install the PCV hose and pipe assembly to the air horn.

3.

Install the air induction hose to the air horn and torque the clamp to 35 lb in (4 N·m).

Air Induction Hose Replacement

Removal

1.

Loosen the induction hose clamps.

2.

Unplug the mass air flow sensor connector.

3.

Remove the hose from the air horn and the air cleaner (Figure 3-30).

Installation

1.

Install the induction hose on the air horn and the air cleaner.

2.

Connect the mass air flow sensor connector.

3.

Tighten the hose clamps to 44 lb.-in. (5 N•m).

Weathercap Replacement

Removal

1.

Remove the three screws holding the weathercap cover to the air intake duct (Figure 3-32).

2.

Remove the three bolts and washers holding the air intake duct to the air intake support.

3.

Remove the air intake duct and gasket.