Installation Procedure

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Catalytic Converter Assembly Outlet Pipe Clamp

Courtesy of GENERAL MOTORS COMPANY

Slide 2 service clamps (1) over the catalytic converter assembly outlet pipe.
Do not tighten at this time.

Fig 2: Identifying Catalytic Converter Assembly & Intermediate Pipe

Courtesy of GENERAL MOTORS COMPANY

NOTE:

Ensure the O2 sensor boss is facing the right side of the vehicle.

Slide the catalytic converter assembly (1) outlet pipe over the intermediate pipe (2).

Fig 3: View Of Exhaust Pipe To Catalytic Converter

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Refer to Exhaust System Inspection Caution .

Place a NEW catalytic converter gasket over the catalytic converter studs.

CAUTION:

Refer to Flex Decoupler Caution .

Raise the exhaust system into position, aligning the catalytic converter with the exhaust manifold pipe.
Install the nuts securing the catalytic converter to the exhaust manifold pipe.
Do not tighten at this time.

Fig 4: View Of Center Exhaust Hangers & Bolts

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Refer to Fastener Caution .

Install the bolts securing the center exhaust hangers to the rear suspension support brackets.
Tighten

Tighten the center exhaust hanger bolts to 30 N.m (22 lb ft).
Tighten the catalytic converter nuts.
Tighten

Tighten the catalytic converter nuts in a crisscross pattern to 25 N.m (18 lb ft).
Remove the jack from under the vehicle.

Fig 5: View Of Catalytic Converter Assembly Outlet Pipe Clamp

Courtesy of GENERAL MOTORS COMPANY

Position the service clamps midway on the catalytic converter assembly outlet pipe, as close together as possible.
Rotate the clamps so the fastening ends are pointing in opposite directions.
Tighten

Tighten the service clamps to 54 N.m (40 lb ft).
Lower the vehicle.
Check the exhaust system for leaks.