Navigator 4WD V8-5.4L (2010)
Exhaust Pipe: Service and Repair
Exhaust Y-Pipe - Dual Catalytic Converter
Exhaust Y-Pipe - Dual Catalytic Converter
Removal
NOTICE: Do not use oil or grease-based lubricants on isolators as they deteriorate the rubber.
NOTE: The exhaust Y-pipe dual catalytic converter is a 2-piece assembly. The RH and LH converters can be serviced separately as needed.
All vehicles
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Vehicle Jacking and Lifting.
2. Disconnect the Heated Oxygen Sensor (HO2S) and Catalyst Monitor Sensor (CMS) electrical connectors.
3. Remove the transmission support crossmember.
4. Loosen the exhaust and transmission mounting bracket cap bolt.
Rear Wheel Drive (RWD) vehicles
5. Remove the 3 bolts and then slide off the exhaust and transmission mounting bracket from the exhaust Y-pipe dual catalytic converter.
Four-Wheel Drive (4WD) vehicles
6. NOTE: On Four-Wheel Drive (4WD) vehicles, the exhaust and transmission mounting bracket will not slide off the exhaust Y-pipe dual catalytic
converter until the exhaust Y-pipe dual catalytic converter is removed from the vehicle.
NOTE: RH side shown, LH side similar.
Remove the 4 bolts from the exhaust and transmission mounting bracket.
