Installation Procedure

Important:  When installing a new exhaust system component, always use new gaskets and seals.

1. Install the front pipe/TWC assembly to the vehicle.
2. Support the TWC with a hanger.
3. Attach the front pipe/TWC assembly with a new gasket to the resonator/muffler/tail pipe assembly.
4. Secure the resonator/muffler/tail pipe assembly with 2 nuts. Do not fully tighten the nuts.
5. Attach the electrical connector to the heated oxygen sensor (H02S2) (6).
Fig 1: Connecting Heated Oxygen Sensor Connectors (2.0L)
Courtesy of GENERAL MOTORS CORP.
6. Connect the front pipe/TWC assembly, with a new seal, to the exhaust manifold and secure with 2 bolts. Do not fully tighten the bolts.
   NOTE: Refer to FASTENER NOTICE .
7. Align all system components before tightening the fasteners, in order to prevent noise or vibrations.

   Tighten 

   • Tighten the front pipe/TWC assembly-to-exhaust manifold bolts to 50 N.m (37 lb ft).
   • Tighten the front pipe/TWC assembly-to-resonator/muffler/tail pipe assembly nuts to 35 N.m (26 lb ft).
8. Lower the vehicle.