Installation Procedure

Fig 1: View of Connecting Pipe Mounting Bracket

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: Position the catalytic converter onto the exhaust manifold flange with one upper flange nut.

Install the catalytic converter lower flange nuts and the connecting pipe mounting bracket.
Tighten:
- Tighten the connecting pipe to catalytic converter nuts to 40 N.m (30 lb ft).
- Tighten the connecting pipe mounting bracket bolt to 40 N.m (30 lb ft).

Fig 2: View of Catalytic Converter Upper Flange Nut

Courtesy of GENERAL MOTORS CORP.

Install the catalytic converter upper flange nuts.
Tighten: Tighten the catalytic converter to exhaust manifold nuts to 50 N.m (37 lb ft).

Fig 3: View of Exhaust Manifold

Courtesy of GENERAL MOTORS CORP.

Install the exhaust manifold cover bolts.
Tighten: Tighten the exhaust manifold cover bolts to 15 N.m (11 lb ft).