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.
- Install the exhaust manifold gaskets to the exhaust manifold.
- Position the exhaust manifold to the engine.
- Raise the vehicle to the proper height.
- Working through the wheelhouse opening, install the exhaust manifold.
- Install the spark plug wire shields.
- Apply threadlock GM P/N 12345493 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 left front tire. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Raise the vehicle.
- Install the exhaust pipe to the exhaust manifold. Refer to
Exhaust Manifold Pipe Replacement
.
- Lower the vehicle.
- Install the EGR valve
inlet pipe to the exhaust manifold.
Tighten
Tighten the EGR valve inlet pipe nut to 30 N·m (22 lb ft).
- Connect the engine coolant
temperature (ECT) sensor electrical connector.
- Install a new AIR pipe
gasket and the AIR pipe to the exhaust manifold.
- Install the AIR pipe nuts.
Tighten
Tighten the AIR pipe nuts to 25 N·m (18 lb ft).
- 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 - Standard.
- Install the air cleaner outlet duct. Refer to
Air Cleaner Outlet Resonator Replacement
in Engine Controls-4.3 L.