63. Exhaust Manifold Installation

Exhaust Manifold Installation





Caution: Refer to Fastener Caution (Fastener Caution).

1. Install new exhaust manifold studs and tighten to 10 Nm (89 lb in).




2. Install the secondary air injection pipe assembly (1).
3. Install the secondary air injection pipe assembly bolts (2) and tighten to 10 Nm(89 lb in).




4. Install the exhaust manifold gasket.
5. Install the exhaust manifold to the cylinder head.
6. Install NEW exhaust manifold to cylinder head retaining nuts finger tight.




7. Tighten the NEW exhaust manifold to cylinder head retaining nuts in sequence. Tighten the nuts a second time to 14 Nm (124 lb in).




8. Coat the threads of the oxygen sensor with antiseize GM P/N 12397953 or equivalent.
9. Install the oxygen sensor and tighten to 42 Nm (31 lb ft).




10. Install the exhaust manifold heat shield.
11. Install the exhaust manifold heat shield bolts and tighten to 25 Nm (18 lb ft).




12. Install the secondary air injection studs (3 and 4) and tighten to 10 Nm(89 lb in).
13. Install the secondary air injection valve assembly (1) with a NEW gasket (2).




14. Install the secondary air injection bolts (2,3) and nuts (1).

1. Tighten the secondary air injection assembly to cylinder head bolts (3) to 22 Nm(16 lb ft)
2. Tighten the secondary air injection assembly to pipe assembly bolts (2) to 10 Nm(89 lb in)
3. Tighten the secondary air injection assembly nuts (1) to 22 Nm(16 lb ft)