Intake Manifold Replacement LY7

1. Turn the ignition OFF.
2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .



3. Remove the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
4. Disconnect the brake booster vacuum hose from the intake manifold.



5. Disconnect the purge solenoid valve electrical connector.



6. Disconnect the purge line (3) from the purge solenoid valve.



7. Remove the wiring harness retainer.



8. Disconnect the throttle body electrical connector.



9. Remove the upper intake manifold brace stud (1), bolt (2), and brace.
10. Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover.



11. Disconnect the barometric pressure sensor electrical connector.



12. Disconnect the intake manifold runner control solenoid electrical connector.



13. Remove the injector harness bracket bolt.
14. Remove the left bank ignition coil wiring harness from the bracket.



15. Remove the upper intake manifold bolts. Some deflection of the cowl panel may be necessary to extract the right rear bolt.
16. Remove the upper intake manifold with the throttle body.
17. If the upper intake manifold is being replaced, disassemble the intake manifold. Refer to Intake Manifold Disassemble .
18. Clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .

1. If the upper intake manifold is being replaced, assemble the intake manifold. Refer to Intake Manifold Assemble .



2. Install a NEW upper intake manifold gasket.
3. Install the upper intake manifold.

Notice: Refer to Fastener Notice in the Preface section.

Important: Tighten the intake manifold bolts in a circular pattern starting at the center (long bolts) and moving outward.

4. Install the upper intake manifold bolts.

Tighten
Tighten the upper intake manifold bolts to 23 N·m (17 lb ft).




5. Connect the barometric pressure sensor electrical connector.



6. Connect the intake manifold runner control solenoid electrical connector.
7. Connect the PCV hose to the right bank camshaft cover.



8. Install the upper intake manifold brace, stud (1) and bolt (2).

Tighten
Tighten the intake manifold brace bolt/stud.

8.1.	Tighten the intake manifold brace bolt (2) to 65 N·m (48 lb ft).

8.2.	Tighten the intake manifold brace stud (1) to 10 N·m (89 lb in).





Notice: Ensure proper engagement of the wiring harness connector. The wiring harness connector must be installed straight onto the component connector and firmly seated. Visually inspect the connector to ensure that the connector latches are engaged and locked. Any damage to the connector or wiring must be repaired. Failure to follow this procedure can lead to an intermittent electrical connection, driveability concerns, and/or wiring harness or wiring harness connector damage or failure.

9. Connect the electrical connector to the throttle body.



10. Install the wiring harness retainer.



11. Connect the purge line (3) to the purge solenoid valve.



12. Connect the purge solenoid valve electrical connector.
13. Connect the brake booster vacuum hose to the intake manifold.



14. Install the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
15. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .

Intake Manifold Replacement LLT

1. Remove the fuel pipe shield. Refer to Fuel Pipe Shield Replacement .
2. Remove the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
3. Disconnect the brake booster vacuum hose (1) from the intake manifold.



4. Disconnect the positive crankcase ventilation (PCV) hose (1) from the intake manifold.



5. Disconnect the purge line (1) from the intake manifold.



6. Remove the purge solenoid bolt (1) from the intake manifold and set the purge solenoid aside.



7. Disconnect the throttle body electrical connector (1).



8. Remove the intake manifold bracket bolt (1).
9. Unclip the engine wiring harness from the intake manifold.



10. Remove the intake manifold bolts (1).
11. Remove the intake manifold and gasket.
12. If replacing the intake manifold, disassemble the intake manifold. Refer to Intake Manifold Disassemble.

1. If installing a new intake manifold, assemble the intake manifold. Refer to Intake Manifold Assemble.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the NEW intake manifold gasket.

Important: Tighten the intake manifold bolts in a circular pattern starting at the center (long bolts) and moving outward.

3. Install the intake manifold.
4. Install the intake manifold bolts (1).

Tighten
Tighten the bolts to 23 N·m (17 lb ft).




5. Clip the engine wiring harness from the intake manifold.
6. Install the intake manifold bracket bolt (1).

Tighten
Tighten the bolt to 23 N·m (17 lb ft).




7. Connect the throttle body electrical connector (1).



8. Install the purge solenoid bolt (1) to the intake manifold.



9. Connect the purge line (1) to the intake manifold.



10. Connect the positive crankcase ventilation (PCV) hose (1) to the intake manifold.



11. Connect the brake booster vacuum hose (1) from the intake manifold.
12. Install Remove the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
13. Install the fuel pipe shield. Refer to Fuel Pipe Shield Replacement.