Catalytic Converter - 5.8L (4V): Installation

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Prior to installation, inspect the Heated Oxygen Sensor (HO2S) and the Catalyst Monitor Sensor (CMS) wiring harness for damage.

NOTE: Using a Scotch Brite® pad, clean the mating surfaces of the manifold outlet flare and the catalytic converter inlet flare, at the catalytic converter outlet flare and the muffler inlet pipe. Keep foreign materials out of the catalytic converters.

NOTE: Using a jackstand, support the catalytic converter near the rear outlet while positioning the converter into place. Align the manifold studs into the pipe flange. Make sure not to damage the studs or mating surfaces.

Install the catalytic converter and the new LH and RH catalytic converter-to-exhaust manifold nuts.
- Tighten to 40 Nm (30 lb-ft).
NOTE: Make sure that the catalytic converter is inserted into the Torca® couplers correctly.

Slide the Torca® couplers over catalyst pipes and engage the coupler clip completely over the converter button.
- Tighten to 48 Nm (35 lb-ft).
  
  Fig 1: Locating Coupler Over Catalyst Pipe
  Courtesy of FORD MOTOR CO.
Connect the RH and LH CMS electrical connectors.
Connect the RH HO2S electrical connector.
- Attach the wiring harness retainer.
Install the battery tray. For additional information, refer to BATTERY, MOUNTING AND CABLES .