Grand Cherokee 4WD V8-5.2L VIN Y (1998)
Exhaust Manifold: Service and Repair
Removal and Installation
REMOVAL
Exhaust manifolds are LOG type with balanced flow.
1. Disconnect the negative cable from the battery.
2. Remove the exhaust manifold heat shields.
3. Remove the EGR tube.
4. Raise the vehicle.
5. Remove the bolts and nuts attaching the exhaust pipe to the exhaust manifold.
6. Lower the vehicle.
7. Remove bolts, nuts and washers attaching manifold to cylinder head.
8. Remove manifold from the cylinder head.
INSTALLATION
CAUTION: If the studs came out with the nuts when removing the exhaust manifold, install new studs.
1. Position the exhaust manifolds on the two studs located on the cylinder head. Install conical washers and nuts on these studs.
2. Install new bolt and washer assemblies in the remaining holes. Start at the center arm and work outward. Tighten the bolts and nuts to 27 Nm (20
ft. lbs.) torque.
3. Raise the vehicle.
4. Assemble the exhaust pipe to the exhaust manifold and secure with bolts, nuts and washers. Tighten these nuts to 31 Nm (23 ft. lbs.)torque.
5. Lower the vehicle.
6. Install the EGR tube.
CAUTION: The exhaust manifold heat shields MUST be installed to protect the underhood components.
7. Install the exhaust manifold heat shields. Tighten the nuts to 27 Nm (20 ft. lbs.)torque.
8. Connect the negative cable to the battery.