Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Catalytic Converter Seal & Exhaust Manifold Components

Courtesy of GENERAL MOTORS CORP.

Install a NEW exhaust manifold to catalytic converter seal (2) into the exhaust manifold.
Place the exhaust manifold into position and install the manifold studs to the catalytic converter.
Place the NEW exhaust manifold gaskets (1) between the manifold and the cylinder head.

NOTE: Refer to Fastener Notice .

Install the exhaust manifold bolts and stud.
Tighten: Tighten the bolts/stud to 30 N.m (22 lb ft).

Fig 2: View Of Exhaust Manifold Heat Shield & Bolts

Courtesy of GENERAL MOTORS CORP.

Install the spark plugs. Refer to Spark Plug Replacement .
Position the exhaust manifold heat shield to the manifold and install the bolts.
Tighten: Tighten the bolts to 9 N.m (80 lb in).

Fig 3: View Of Catalytic Converter To Exhaust Manifold Nuts

Courtesy of GENERAL MOTORS CORP.

Raise and support the vehicle.
Install the catalytic converter to exhaust manifold nuts (1).
Tighten: Tighten the nuts to 50 N.m (37 lb ft).
Lower the vehicle.