112. Exhaust Manifold Installation - Right Side

Exhaust Manifold Installation - Right Side





Caution: Refer to Fastener Caution (Fastener Caution).

1. If the engine is equipped with coolant heaters, install the right side (1) heater as follows:

1. Place the coolant heater (1) in position on the cylinder block.
2. Install the coolant heater bolt and tighten to 10 Nm (89 lb in).




2. Position a new manifold gasket (1) in place on the cylinder head studs.
3. Using two hands, position the manifold (2) onto the cylinder head.
4. Install two outer manifold nuts (3) to hold the manifold in place.
5. Install the remaining manifold nuts. Tighten the exhaust manifold nuts (3) to 25 Nm (18 lb ft).




6. Coat the oxygen sensor threads with high temperature anti-seize, GM P/N 12377953 or equivalent.
7. Install the oxygen sensor (1) and tighten to 40 Nm (30 lb ft).





Note: DO NOT reuse the old secondary air injection (AIR) valve pipe gasket.

8. Install the NEW AIR valve pipe gasket.
9. Install the AIR valve.
10. Install the AIR valve bolts through the mounting bracket and tighten to 9 Nm (80 lb in).
11. Install the AIR valve pipe nuts to the exhaust manifold. Tighten the AIR valve pipe nuts to 9 Nm (80 lb in).




12. Install the exhaust intermediate pipe.




13. Install the exhaust intermediate pipe bolts and tighten to 30 Nm (22 lb ft).




14. Install the engine rear lift bracket.
15. Install the engine rear lift bracket bolts and tighten to 30 Nm (22 lb ft).





Note: The exhaust gas recirculation (EGR) valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

16. Install the NEW EGR valve inlet pipe into the water crossover port.




17. Loosely thread the EGR valve inlet pipe nut (1) onto the fitting on the exhaust intermediate pipe.




18. Loosely thread the EGR valve inlet pipe bolt into the water crossover.
19. Tighten the EGR valve inlet pipe nut and tighten to 60 Nm (44 lb ft).
20. Tighten the EGR valve inlet pipe bolt and tighten to 28 Nm (21 lb ft).