Grand Cherokee 2WD V8-5.2L VIN Y (1998)
Catalytic Converter: Service and Repair
REMOVAL
WARNING: if torches are used when working on the exhaust system, do not allow the flame near the fuel lines.
1. Raise and support the vehicle.
2. Saturate the bolts and nuts with heat valve lubricant. Allow 5 minutes for penetration.
3. Remove exhaust clamp from the catalytic converter and exhaust pipe connection.
4. Remove exhaust clamp from the catalytic converter and muffler connection.
5. Disconnect oxygen sensor wiring.
6. Heat the exhaust pipe, catalytic converter and muffler connections with an torch until the metal becomes cherry red.
7. While the metal is still cherry red, twist the catalytic converter back and forth to separate it from the exhaust pipe and the muffler.
INSTALLATION
1. Position the exhaust clamp over the exhaust pipe/catalytic converter connection. Tighten the nuts to 61 Nm (45 ft. lbs.) torque.
2. Install the muffler onto the catalytic converter until the alignment tab is inserted into the alignment slot.
3. Install the exhaust clamp at the muffler and catalytic converter connection. Tighten the clamp nuts to 61 Nm (45 ft. lbs.) torque.
4. Connect oxygen sensor wiring.
5. Lower the vehicle.
6. Start the engine and inspect for exhaust leaks and exhaust system contact with the body panels. Adjust the alignment, if needed.
