Installation Procedure

Install the heated oxygen sensor 1 to the three way warm up catalytic converter. Refer to Heated Oxygen Sensor Replacement - Sensor 1 .
Pre-install a NEW three way warm up catalytic converter V-clamp.
NOTE: Never re-use the V-clamp.
Install the three way warm up catalytic converter to the turbocharger and the three way warm up catalytic converter brackets. Install a NEW three way warm up catalytic converter to turbocharger seal ring.
Install and hand-tighten the 2 three way warm up catalytic converter bracket nuts (1) and (2).

Fig 1: Catalytic Converter Bracket Nuts
Courtesy of GENERAL MOTORS COMPANY
Lower the vehicle.
Install the three way warm up catalytic converter V-clamp to the catalytic converter to turbocharger flange.
The three way warm up catalytic converter V-clamp (1) should be installed in the shown position.

Fig 2: Catalytic Converter V-Clamp
Courtesy of GENERAL MOTORS COMPANY
Hand-tighten the three way warm up catalytic converter V-clamp.
Raise and support the vehicle.
Tighten the 2 three way catalytic converter bracket nuts to 22 N.m (16 lb ft).
CAUTION: Refer to Fastener Caution .
Install the catalytic converter (3) and a NEW catalytic converter gasket (1) to the three way warm up catalytic converter.

Fig 3: Catalytic Converter
Courtesy of GENERAL MOTORS COMPANY
Install the 3 NEW catalytic converter flange nuts (2) and tighten to 22 N.m (16 lb ft).
Install the engine front compartment insulator if equipped. Refer to Front Compartment Insulator Replacement
Lower the vehicle.
Tighten the three way catalytic converter V-clamp bolt to 13 N.m (115 lb in).
Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (1.8L LUW and LWE) and Exhaust Manifold Heat Shield Replacement (1.4L LUV) .
Connect the heated oxygen sensor 1 wiring harness plug. Refer to Heated Oxygen Sensor Replacement - Sensor 1 .
Connect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
Close the hood.