Important: To assist in installing the exhaust manifold to the engine, the tabs on a NEW exhaust manifold gasket will hold the gasket and bolts in place.
- Sub-assemble the bolts, spark plug wire shields, and NEW gaskets to the exhaust manifold.
The stud installs in the front hole.
- Ensure that the exhaust manifold bolts are held in place by the tabs on the exhaust manifold gaskets.
- From under the hood position the exhaust manifold by the engine.
- Raise the vehicle to the proper height.
- Working the wheelhouse opening, install the exhaust manifold.
- Install the spark plug wire shields.
- If reusing the fasteners, apply threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts and stud.
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.
- Install the exhaust manifold bolts and stud.
Tighten
- Tighten the exhaust manifold bolts and stud on the first pass to 15 N·m (11 lb ft).
- Tighten the exhaust manifold bolts and stud on the final pass to 30 N·m (22 lb ft).
- Install the spark plug wires to the spark plug wire retainers.
- Install the spark plug wires onto the spark plugs.
- Install the fender wheelhouse extension.
- Install the front tire to. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Raise the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Connect the exhaust pipe to the exhaust manifold. Refer to
Exhaust Manifold Pipe Replacement
.
- Lower the vehicle.
- Connect the ECT sensor electrical connector.
- Install the radiator inlet hose support bracket and nut.
Tighten
Tighten the radiator inlet hose support bracket nut to 36 N·m (27 lb ft).
- Install the intermediate steering shaft. Refer to
Lower Intermediate Steering Shaft Replacement
in Steering Wheel and Column.
Notice:
• | Handle the MAF sensor carefully. |
• | Do not drop the MAF sensor in order to prevent damage to the MAF
sensor. |
• | Do not damage the screen located on the air inlet
end of the MAF. |
• | Do not touch the sensing elements. |
• | Do not allow solvents and lubricants to come in contact with the
sensing elements. |
• | Use a small amount of a soap based solution in order to aid in
the installation. |
- Install air cleaner outlet duct to throttle body.
- Install air cleaner outlet duct to MAF sensor.
- Connect the IAT sensor harness connector.
- Install the air cleaner outlet duct retaining wingnut.
- Connect the breather tube to the air cleaner outlet duct.