MANIFOLD - EXHAUST
DESCRIPTION
The exhaust manifolds are tube in shell airgap design to maximize durability and performance. The exhaust manifolds are made of stainless steel stamped shells and stainless steel tubes with a powdered metal outlet. A layered graphite over perforated steel manifold gasket is used to provide sealing to the cylinder head.
OPERATION
The exhaust manifolds collect the engine exhaust exiting the combustion chambers, then channels the exhaust gases to the exhaust pipes attached to the manifolds.REMOVAL
EXHAUST MANIFOLD - LEFT SIDE
1. Remove air cleaner housing.
2. Disconnect negative battery cable.
3. Remove exhaust pipe to manifold bolts, remove pipe.
4. Remove starter (1) and heat shield (3).
5. Remove knock sensor.
6. Remove the front propeller shaft at the front axle, and position out of the way. (Refer to 3 - DIFFERENTIAL & DRIVELINE/PROPELLER SHAFT/PROPELLER SHAFT - REMOVAL).
7. Remove both left and right side engine mount to frame bolts (3).
8. Install engine support fixture special tool # 8534 (1). Do not use the third leg.
9. Raise engine using special tool # 8534 to provide clearance to remove the exhaust manifold.
10. Remove the top row of bolts from manifold from under the hood.
11. Remove the bottom row of bolts from manifold from under vehicle.
12. Remove manifold from under vehicle.
EXHAUST MANIFOLD - RIGHT SIDE
1. Disconnect negative battery cable.
2. Remove exhaust pipe to manifold bolts, remove pipe.
3. Remove knock sensor.
4. Remove both left and right side engine mount to frame bolts (3).
5. Install engine support fixture special tool # 8534 (1). Do not use the third leg.
6. Raise engine using special tool # 8534 to provide clearance to remove the exhaust manifold.
7. Remove the top row of bolts from manifold from under the hood.
8. Remove the bottom row of bolts from manifold from under vehicle.
9. Remove the manifold from under vehicle.
CLEANING
Clean mating surfaces on cylinder head and manifold. Wash with solvent and blow dry with compressed air.
INSPECTION
Inspect manifold for cracks.
Inspect mating surfaces of manifold for flatness with a straight edge. Gasket surfaces must be flat within 0.375 mm (0.0147 in.) around each port opening, and 0.75 mm (0.0295 in.) overall.
INSTALLATION
EXHAUST MANIFOLD - LEFT SIDE
1. Install manifold gasket and manifold.
2. Install manifold bolts and torque to 31 N·m (23 ft. lbs.) using the sequence provided.
3. Install the knock sensor.
4. Install starter (1) and heat shield (3).
5. Lower the engine using special tool # 8534 (1).
6. Install both left and right side engine mount to frame bolts (3).
7. Remove engine support fixture special tool # 8534 (1).
8. Install the front propeller shaft. (Refer to 3 - DIFFERENTIAL & DRIVELINE/PROPELLER SHAFT/PROPELLER SHAFT - INSTALLATION).
9. Install the exhaust pipe to manifold bolts.
10. Reconnect negative battery cable.
EXHAUST MANIFOLD - RIGHT SIDE
1. Install manifold gasket and manifold.
2. Install manifold bolts and torque to 31 N·m (23 ft. lbs.) using the sequence provided.
3. Lower the engine using special tool # 8534 (1).
4. Install both left and right side engine mount to frame bolts (3).
5. Remove engine support fixture special tool # 8534 (1).
6. Install the air cleaner housing.
7. Install the knock sensor.
8. Install the exhaust pipe to manifold bolts.
9. Reconnect negative battery cable.