Lincoln Aviator: Exhaust System - 3.0L EcoBoost / Removal and Installation - Catalytic Converter RH

Removal

NOTE: If the catalytic converter is not being replaced, the HO2S and the catalyst monitor sensor do not need to be removed from the catalytic converter. Disconnecting the electrical connectors is still necessary.

NOTE: The exhaust Y-pipe dual catalytic converter is a 2-piece assembly. The LH and RH converters can be serviced separately as needed.

1. With the vehicle in NEUTRAL, position it on a hoist.
   Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
   

1. Remove the RH side exhaust flexible pipe.
   Refer to: Exhaust Flexible Pipe (309-00A Exhaust System - 3.0L EcoBoost, Removal and Installation).
   

1. 
   On both sides.
   
   • Remove the wheel arch liner to front subframe retainers.
     

1. Disconnect the HO2S electrical connector.
   

1. Disconnect the HO2S electrical connector.
   

1. Position the adjustable jack stand under the transmission system mount bracket.
   

1. Remove and discard the transmission mount bracket bolts.
   Torque: 59 lb.ft (80 Nm)

1. Lower the transmission system.
   

1. • Remove the nut.
     
   • Remove the pin-type retainers and the steering shield from the RH subframe.
     

1. Remove the bolt and position the RH underbody shield aside.
   Torque: 22 lb.in (2.5 Nm)

1. Remove the bolt and position the LH underbody shield aside.
   Torque: 22 lb.in (2.5 Nm)

1. • Remove the nut.
     
   • Remove the pin-type retainers and the steering shield from the LH subframe.
     

1. Loosen the middle subframe bolts.
   Torque: 195 lb.ft (265 Nm)

1. 
   
   • Support the rear of the subframe with adjustable jack stands.
     

   • NOTICE: Only use hand tools when removing rear subframe bolts.

     Loosen the rear subframe bolts.
     Torque: 52 lb.ft (70 Nm)
   • Lower the subframe.
     

1. Remove the RH catalytic converter nuts and discard.
   

1. Remove the bracket studs and nuts. Remove the RH catalytic converter from the vehicle.
   

1. Clean and inspect the studs and the gasket surface, replace the studs if necessary.
   Torque: 18 lb.ft (25 Nm)

Installation

1. Clean all exhaust connections before reassembly.
   

1. NOTE: Make sure that new gasket is installed.

   Install the exhaust gasket.
   

1. NOTE: The studs and nuts are only finger tight in this step.

   Install the catalytic converter and bracket studs and nuts.
   

1. NOTE: Make sure that new nuts are installed.

   Install the RH catalytic converter nuts.
   Torque: 35 lb.ft (48 Nm)

1. Tighten the catalyst assembly bracket studs and nuts.
   Torque:
      Studs:   18 lb.ft (25 Nm)
      Nuts:   18 lb.ft (25 Nm)

1. To install, reverse the removal procedure.
   

1. Check the exhaust system for leaks.