For 1990-2009 cars

## Exhaust Manifold Replacement - Right Side 6.0L Engine - HSV Maloo

### Removal Procedure -- LS2

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

1. Disconnect the battery ground cable from the battery. Refer to Battery Negative Cable Disconnection and Connection.
2. Remove the engine dress cover. Refer to Engine Cover Replacement.
3. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement.
4. Remove the right side spark plug leads. Refer to Spark Plug Wire Replacement.
5. Remove the right side spark plugs from the cylinder head. Refer to Spark Plug Replacement.
6. Remove the right side catalytic converter. Refer to Catalytic Converter Replacement - Right Side.
7. Loosen the exhaust manifold to cylinder head retaining bolts (1) working from the outside to the centre.

Important: Bolts with micro-encapsulated thread sealant must be discarded after removal.

8. Remove the exhaust manifold to cylinder head retaining bolts (1).

Discard the bolts.

Important: Make sure that the surrounding wiring harness and electrical connectors are not damaged when removing the exhaust manifold (2).

Important: The exhaust manifold gasket (1) and sealing ring (3) are single use parts. They must be discarded after removal.

Important: The right hand exhaust manifold can only be removed upwards out of the engine bay.

9. Remove the exhaust manifold (2).

Discard the exhaust manifold gasket (1) and sealing ring (3).

### Installation Procedure -- LS2

Notice: Refer to Exhaust Service Caution in the Preface section.

1. Before installation inspect for the following:

• | Damage to the gasket sealing surfaces.

• | Distortion of exhaust manifold mating surface.

• | Damage to the exhaust mounting holes.

2. Check for distortion on the mating surface of the exhaust manifold (1) by using a straight edge (2) and a feeler gauge (3).
3. Clean the exhaust manifold and catalytic converter flange mating surfaces.
4. Install a NEW exhaust manifold gasket (1) and a NEW sealing ring (3) onto the exhaust manifold (2).

Notice: Refer to Exhaust System Inspection Notice in the Preface section.

5. Install the exhaust manifold assembly to engine.

Important: Do not fully tighten the exhaust manifold to cylinder head retaining bolts (1) at this stage.

6. Install the NEW exhaust manifold to cylinder head retaining bolts (1).

Do not fully tighten at this stage.

7. Clean the threads of the exhaust manifold to catalytic converter retaining studs with a suitable cleaning solvent.
8. Tighten the exhaust manifold to cylinder head retaining bolts (1) working from the centre to the outside.

Tighten
Tighten the bolts to 20 Nm (15 lb ft).

Important: Make sure the sealing ring is seated correctly.

9. Install the right side catalytic converter. Refer to Catalytic Converter Replacement - Right Side
10. Install the right side spark plugs to the cylinder head. Refer to Spark Plug Replacement.
11. Install the right side spark plug leads. Refer to Spark Plug Wire Replacement.
12. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement.
13. Install the engine dress cover. Refer to Engine Cover Replacement.
14. Connect the battery ground cable to the battery. Refer to Battery Negative Cable Disconnection and Connection.

## Exhaust Manifold Replacement - Right Side 3.6L Engine

### Removal Procedure

1. Disconnect the battery ground cable from the battery. Refer to Battery Negative Cable Disconnection and Connection.
2. Remove the engine dress cover. Refer to Engine Cover Replacement.

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

3. Remove the exhaust manifold heat shield to exhaust manifold retaining bolts (1).
4. Remove the exhaust manifold heat shield (2).

Important: The right catalytic converter to exhaust manifold retaining nuts (3) are single use parts. They must be discarded after removal.

5. Remove the right catalytic converter to exhaust manifold retaining nuts (3).

Discard the nuts.

6. Remove the right catalytic converter. Refer to Catalytic Converter Replacement - Right Side.
7. Lower the vehicle.
8. Loosen the exhaust manifold to cylinder head retaining bolts (1) working from the outside to the centre.

Important: Bolts with micro-encapsulated thread sealant must be discarded after removal.

9. Remove the exhaust manifold to cylinder head retaining bolts (1).

Discard the bolts.

Important: Make sure that the surrounding wiring harness and electrical connectors are not damaged when removing the exhaust manifold (2).

Important: The exhaust manifold gasket (1) and sealing ring (3) are single use parts. They must be discarded after removal.

10. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
11. Remove the exhaust manifold (2).

Discard the exhaust manifold gasket (1) and sealing ring (3).

### Installation Procedure

Notice: Refer to Exhaust Service Caution in the Preface section.

1. Before installation inspect for the following:

• | Damage to the gasket sealing surfaces.

• | Distortion of exhaust manifold mating surface.

• | Damage to the exhaust mounting holes.

2. Check for distortion on the mating surface of the exhaust manifold (3) by using a straight edge (1) and a feeler gauge (2).
3. Clean the exhaust manifold and catalytic converter flange mating surfaces.
4. Install a NEW exhaust manifold gasket (1) and NEW sealing ring (3) to the exhaust manifold (2).

Notice: Refer to Exhaust System Inspection Notice in the Preface section.

5. Install the exhaust manifold assembly to the engine.

Important: Do not fully tighten the exhaust manifold to cylinder head retaining bolts (1) at this stage.

6. Install the NEW exhaust manifold to cylinder head retaining bolts (1).

Do not fully tighten at this stage.

Important: Make sure the sealing ring is seated correctly.

7. Install the right catalytic converter. Refer to Catalytic Converter Replacement - Right Side.

Notice: Refer to Fastener Notice in the Preface section.

8. Install the NEW right catalytic converter to exhaust manifold retaining nuts (3).

Tighten
Tighten the nuts to 45 N·m (33 lb ft).

9. Tighten the exhaust manifold to cylinder head retaining bolts (1) working from the centre to the outside.

Tighten
Tighten the bolts to 20 N·m (15 lb ft).

10. Install the exhaust manifold heat shield (2).
11. Install the exhaust manifold heat shield to exhaust manifold retaining bolts (1).

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

12. Install the engine dress cover. Refer to Engine Cover Replacement.
13. Connect the battery ground cable to the battery. Refer to Battery Negative Cable Disconnection and Connection.

## Exhaust Manifold Replacement - Right Side 6.0L Engine - Except HSV Maloo

### Removal Procedure

1. Disconnect the battery ground cable from the battery. Refer to Battery Negative Cable Disconnection and Connection.
2. Remove the engine dress cover. Refer to Engine Cover Replacement.
3. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement.
4. Remove the right side spark plug leads. Refer to Spark Plug Wire Replacement.
5. Remove the right side spark plugs from the cylinder head. Refer to Spark Plug Replacement.

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

6. Remove the exhaust manifold heat shield to exhaust manifold retaining bolts (2).
7. Remove the exhaust manifold heat shield (1).

Important: The right catalytic converter to exhaust manifold retaining nuts (1) are single use parts. They must be discarded after removal.

8. Remove the right catalytic converter to exhaust manifold retaining nuts (1).

Discard the nuts.

9. Disconnect the right catalytic converter (4) from the exhaust manifold (3).
10. Loosen the exhaust manifold to cylinder head retaining bolts (2) working from the outside to the centre.

Important: Bolts with micro-encapsulated thread sealant must be discarded after removal.

Discard the bolts.
11. Remove the exhaust manifold to cylinder head retaining bolts (2).

Important: Make sure that the surrounding wiring harness and electrical connectors are not damaged when removing the exhaust manifold (2).

Important: The exhaust manifold gasket (1) and sealing ring (3) are single use parts. They must be discarded after removal.

12. Remove the exhaust manifold (2).

Discard the exhaust manifold gasket (1) and sealing ring (3).

### Installation Procedure

Notice: Refer to Exhaust Service Caution in the Preface section.

1. Before installation inspect for the following:

• | Damage to the gasket sealing surfaces.

• | Distortion of exhaust manifold mating surface.

• | Damage to the exhaust mounting holes.

2. Check for distortion on the mating surface of the exhaust manifold (3) by using a straight edge (1) and a feeler gauge (2).
3. Clean the exhaust manifold and catalytic converter flange mating surfaces.
4. Install NEW exhaust manifold gasket (1) and NEW sealing ring (3) to the exhaust manifold (2).

Notice: Refer to Exhaust System Inspection Notice in the Preface section.

5. Install the exhaust manifold assembly to engine.

Important: Do not fully tighten the exhaust manifold to cylinder head retaining bolts (1) at this stage.

6. Install the NEW exhaust manifold to cylinder head retaining bolts (1).

Do not fully tighten at this stage.

Important: Make sure the sealing ring is seated correctly.

7. Lift the right catalytic converter (4) up and forward to connect to the exhaust manifold (3).
8. Clean the threads of the exhaust manifold to catalytic converter retaining studs with a suitable cleaning solvent.

Notice: Refer to Fastener Notice in the Preface section.

9. Install the NEW right catalytic converter to exhaust manifold retaining nuts (1).

Tighten
Tighten the nuts to 45 N·m (33 lb ft).

10. Tighten the exhaust manifold to cylinder head retaining bolts (2) working from the centre to the outside.

Tighten
Tighten the bolts to 20 N·m (15 lb ft).

11. Install the exhaust manifold heat shield (1).
12. Install the exhaust manifold heat shield to exhaust manifold retaining bolts (2).

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

13. Install the right side spark plugs to the cylinder head. Refer to Spark Plug Replacement.
14. Install the right side spark plug leads. Refer to Spark Plug Wire Replacement.
15. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement.
16. Install the engine dress cover. Refer to Engine Cover Replacement.
17. Connect the battery ground cable to the battery. Refer to Battery Negative Cable Disconnection and Connection.