Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Install the rear exhaust hanger brackets to the rear exhaust hangers.
CAUTION: Refer to FASTENER NOTICE .
Install the two nuts securing the rear exhaust hangers to the rear exhaust hanger brackets.
Tighten

Tighten the rear exhaust hanger nuts to 30 N.m (22 ft lbs).

Fig 1: Installing Rear Exhaust Hanger Brackets To Rear Exhaust Hangers
Courtesy of GENERAL MOTORS CORP.

CAUTION: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on underbody to prevent overheating on the floor pan and possible damage to the passenger compartment insulation and trim materials.
Place a NEW catalytic converter gasket over the catalytic converter studs.
CAUTION: Do not over-flex or damage the flex decoupler joint when moving the flex decoupler joint from normal mounting position. The flex decoupler joint will flex a maximum of six degrees which is equivalent to the pipes connected at the joint which move 1 inch for each foot length of pipe. A three foot pipe would move a maximum of three inches.
With the aid of an assistant, raise the exhaust system into position, aligning the catalytic converter with the exhaust manifold pipe.
Finger tighten the four nuts to the catalytic converter studs.

Fig 2: Installing Catalytic Converter From Exhaust Manifold Pipe
Courtesy of GENERAL MOTORS CORP.
Install the two bolts securing the rear exhaust hanger brackets to the rear compartment rails.
Tighten

Tighten the rear exhaust hanger bolts to 50 N.m (37 ft lbs).

Fig 3: Installing Exhaust System
Courtesy of GENERAL MOTORS CORP.
Install the two bolts securing the center exhaust hangers to the rear suspension support brackets.
Tighten

Tighten the center exhaust hanger bolts to 30 N.m (22 ft lbs).

Fig 4: Installing Exhaust Hangers To Rear Suspension Support Brackets

Courtesy of GENERAL MOTORS CORP.

Tighten the four catalytic converter nuts previously installed in step 5.
Tighten

Tighten the catalytic converter nuts to 25 N.m (18 ft lbs).
Install the heated oxygen sensor. Refer to DOWNSTREAM HEATED OXYGEN SENSOR .
Install the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
Lower the vehicle.