Exhaust Manifold Replacement - Left Side 3.4L

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
2. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.4L.
3. Remove the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Side in Engine Mechanical - 3.4L.
4. Remove the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.



5. Remove the exhaust crossover pipe heat shield bolts.
6. Remove the exhaust crossover pipe heat shield.



7. Remove the exhaust crossover pipe nuts from the left exhaust manifold.



8. Remove the left exhaust manifold heat shield bolts.
9. Remove the left exhaust manifold heat shield.



10. Remove the left exhaust manifold nuts.
11. Remove the left exhaust manifold.
12. Remove the left exhaust manifold gasket.
13. Clean and inspect the left exhaust manifold mating surfaces.

1. Install the left exhaust manifold gasket.
2. Install the left exhaust manifold.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the left exhaust manifold nuts.

Tighten
Tighten the nuts to 16 N·m (12 lb ft).




4. Install the left exhaust manifold heat shield.
5. Install the left exhaust manifold heat shield bolts.

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




6. Install the exhaust crossover pipe nuts to the left exhaust manifold.

Tighten
Tighten the nuts to 25 N·m (18 lb ft).




7. Install the exhaust crossover pipe heat shield.
8. Install the exhaust crossover pipe heat shield bolts.

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

9. Install the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
10. Install the right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Side in Engine Mechanical - 3.4L.
11. Install the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.4L.
12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

Exhaust Manifold Replacement - Left Side 3.8L

1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.
2. Remove the right and the left engine mount struts. Refer to Engine Mount Strut Replacement - Right Side and Engine Mount Strut Replacement - Left Side in Engine Mechanical - 3.8L.
3. Remove the lower right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Lower in Engine Mechanical - 3.8L.
4. Remove the exhaust crossover pipe from the left exhaust manifold. Refer to Exhaust Crossover Pipe Replacement .
5. Remove the spark plug wires from the left side spark plugs. Refer to Spark Plug Wire Replacement in Engine Controls - 3.8L.
6. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement in Engine Mechanical - 3.8L.
7. Remove the left engine lift bracket nut, bolt and engine lift bracket.



8. Remove the left exhaust manifold heat shield nuts and the exhaust manifold heat shield.



9. Remove the left exhaust manifold bolts and the studs.
10. Remove the left exhaust manifold and the gasket.
11. Clean and inspect the left exhaust manifold mating surfaces.

1. Install the left exhaust manifold gasket and the left exhaust manifold to the cylinder head.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the left exhaust manifold bolts and the studs to the left exhaust manifold.

Tighten
Tighten the bolts and the studs to 30 N·m (22 lb ft).




3. Install the left exhaust manifold heat shield to the exhaust manifold.
4. Install the exhaust manifold heat shield nuts.

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




5. Install the left engine lift bracket.
6. Install the engine lift bracket nut and the bolt.

Tighten
Tighten the nut and the bolt to 30 N·m (22 lb ft).

7. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement in Engine Mechanical - 3.8L.
8. Install the spark plug wires to the left side spark plugs. Refer to Spark Plug Wire Replacement in Engine Controls - 3.8L.
9. Install the exhaust crossover to the left exhaust manifold. Refer to Exhaust Crossover Pipe Replacement .
10. Install the lower right engine mount strut bracket. Refer to Engine Mount Strut Bracket Replacement - Right Lower in Engine Mechanical - 3.8L.
11. Install the right and the left engine mount struts. Refer to Engine Mount Strut Replacement - Right Side and Engine Mount Strut Replacement - Left Side in Engine Mechanical - 3.8L.
12. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement In Engine Mechanical - 3.8L.