Exhaust Manifold Replacement - Left Side 4.3L
Removal Procedure
- Remove the engine cover. Refer to
Engine Cover Replacement
in Interior Trim.
- Disconnect the engine coolant temperature (ECT) gage sensor electrical
connector.
- Raise the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Remove the left front tire.
- Remove the left fender wheelhouse extension (1).
- Remove the catalytic converter assembly. Refer to
Catalytic Converter Replacement
.
- Remove the EGR valve inlet pipe from the exhaust manifold.
- Remove the spark plug wires from the spark
plugs.
- Remove the spark plug wire support bolts.
- Remove the spark plug wire support with the spark plug wires.
- Remove the spark plugs.
- Remove the exhaust manifold, gaskets and
the spark plug wire shields from underneath the vehicle.
- Clean all gasket surfaces.
Installation Procedure
Important: To assist in installing the exhaust manifold to the engine, the tabs on a
NEW exhaust manifold gasket will hold the gasket and the bolts in place.
- Sub-assemble the NEW gaskets, the spark plug wire shields, and the bolts to
the exhaust manifold.
- Ensure that the exhaust manifold bolts are held in place by the tabs
on the exhaust manifold gaskets.
Notice: Refer to Fastener Notice in the Preface section.
- Install the exhaust manifold.
Tighten
- Tighten the exhaust manifold bolts - First Pass to 15 N·m
(11 lb ft).
- Tighten the exhaust manifold bolts - Second Pass to 30 N·m
(22 lb ft).
- Install the spark plugs.
- Install the spark plug wires to the spark plugs.
- Install the spark plug wire support and bolts.
Tighten
Tighten the spark plug wire support bolts to 12 N·m (106 lb in).
- Install the EGR valve inlet pipe to the exhaust manifold.
Tighten
Tighten the EGR valve inlet pipe exhaust manifold nut to 30 N·m
(22 lb ft).
- Install the catalytic converter assembly. Refer to
Catalytic Converter Replacement
.
- Install the fender wheelhouse extension
(1).
- Install the left front tire.
- Lower the vehicle.
- Connect the ECT gage sensor electrical
connector.
- Install the engine cover. Refer to
Engine Cover Replacement
in Interior Trim.
Exhaust Manifold Replacement - Left Side 4.8L, 5.3L, 6.0L
Removal Procedure
- Raise the vehicle. Refer to
Lifting and Jacking the Vehicle
.
- Remove the catalytic converter from
the exhaust manifold. Refer to
Catalytic Converter Replacement
.
- Remove the engine cover. Refer to
Engine Cover Replacement
.
- Disconnect the EGR valve pipe from the exhaust manifold if equipped.
- Remove the spark plug wires.
- Remove the exhaust manifold.
- Clean all sealing surfaces.
Installation Procedure
Notice: Refer to Fastener Notice in the Preface section.
- Install the exhaust manifold.
Tighten
- Tighten the exhaust manifold bolts - First Pass to 15 N·m (11 lb ft).
- Tighten the exhaust manifold bolts - Second Pass to 25 N·m (18 lb ft).
- Connect the EGR valve pipe to the manifold.
- Install the spark plug wires.
- Install the exhaust pipe to the exhaust manifold.
- Install the engine cover. Refer to
Engine Cover Replacement
.
Exhaust Manifold Replacement - Left Side 6.6L
Callout
| Component Name
|
Preliminary Procedures
- Remove the left side exhaust pipe. Refer to
Exhaust Pipe Replacement - Left Side
.
- Raise and suitably support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
|
1
| Exhaust Manifold Nut (Qty: 2)
Notice: Refer to Fastener Notice in the Preface section.
Tip Torque the exhaust manifold nuts in the sequence shown in the graphic.
Tighten 38 N·m (28 lb ft) |
2
| Exhaust Manifold Bolt (Qty: 6)
Tip Torque the exhaust manifold bolts in the sequence shown in the graphic.
Tighten 38 N·m (28 lb ft) |
3
| Left Side Exhaust Manifold
Procedure
- Transfer the exhaust manifold heat shield.
- Replace or transfer the exhaust manifold gasket as needed.
|