Catalytic Converter - 5.0L: Installation

All catalytic converters 

1. Install a new ball clamp on the exhaust H-pipe.

   LH catalytic converter 

2. NOTE: Prior to installation, inspect 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 exhaust H-pipe. Keep foreign materials out of the catalytic converters.
   NOTE: Hand-tighten all the catalytic converter nuts.

   Install the LH catalytic converter, gasket and 2 new nuts.

   • Do not tighten the LH catalytic converter-to-exhaust manifold nuts at this time.

   RH catalytic converter 

3. NOTE: Prior to installation, inspect 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 exhaust H-pipe. Keep foreign materials out of the catalytic converters.
   NOTE: Hand-tighten all the catalytic converter nuts.

   Install the RH catalytic converter, gasket and 2 new nuts.

   • Do not tighten the RH catalytic converter-to-exhaust manifold nuts at this time.

   All catalytic converters 

4. Using a jackstand, support the exhaust H-pipe.

   LH catalytic converter 

5. NOTE: Tighten the LH catalytic converter-to-exhaust manifold nuts alternately in 10 Nm (89 lb-in) increments to maintain torque and draw flange evenly to assure alignment of exhaust system. Tighten the new nuts to 40 Nm (30 lb-ft).
   NOTE: Make sure to correctly align the catalytic converter to the exhaust manifold and exhaust H-pipe before tightening the fasteners.

   Tighten the 2 LH catalytic converter-to-exhaust manifold nuts.

   • Tighten to 40 Nm (30 lb-ft).
     • Alternately tighten, in 10 Nm (89 lb-in) increments.

   RH catalytic converter 

6. NOTE: Tighten the RH catalytic converter-to-exhaust manifold nuts alternately in 10 Nm (89 lb-in) increments to maintain torque and draw flange evenly to assure alignment of exhaust system. Tighten the new nuts to 40 Nm (30 lb-ft).
   NOTE: Make sure to correctly align the catalytic converter to the exhaust manifold and exhaust H-pipe before tightening the fasteners.

   Tighten the 2 RH catalytic converter-to-exhaust manifold nuts.

   • Tighten to 40 Nm (30 lb-ft).
     • Alternately tighten, in 10 Nm (89 lb-in) increments.

   All catalytic converters 

7. Tighten the catalytic converter-to-exhaust H-pipe ball clamp.
   • Tighten to 30 Nm (22 lb-ft).
8. Connect the Catalyst Monitor Sensor (CMS) electrical connector.