63. Exhaust Manifold Installation

Exhaust Manifold Installation

Notice: Refer to Fastener Notice in Service Precautions.





1. Install new exhaust manifold studs.
Tighten the studs to 10 Nm (89 inch lbs.).





2. Install the exhaust manifold gasket.
3. Install the exhaust manifold to the cylinder head.
4. Install the exhaust manifold to the cylinder head retaining nuts. Follow the tightening sequence.
Tighten the nuts to 12 Nm (9 ft. lbs.).





5. Coat the threads of the oxygen sensor with antisieze compound GM P/N United States 12397953.
6. Install the oxygen sensor.
Tighten the bolts to 30 Nm (22 ft. lbs.).





7. Install the block heater if equipped.
10 Nm (89 inch lbs.)





8. Install the exhaust manifold heat shield.
9. Install the exhaust manifold heat shield bolts.
Tighten the bolts to 25 Nm (18 ft. lbs.).