Exhaust Manifold Heat Shield Replacement

Exhaust Manifold Heat Shield Replacement (LLR)

Removal Procedure
Warning: Refer to Exhaust Service Warning (Exhaust Service Warning).

Warning: Refer to Protective Goggles and Glove Warning (Protective Goggles and Glove Warning).





1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair).
3. If equipped with an automatic transmission, remove the transmission filler tube bracket nut from the secondary air injection (AIR) adapter, and position aside.
4. Remove the heated oxygen sensor (HO2S) from the exhaust manifold. Refer to Heated Oxygen Sensor Replacement - Sensor 1 (Heated Oxygen Sensor Replacement - Sensor 1).




5. Remove the nuts securing the heat shield to the exhaust manifold.
6. Remove the exhaust manifold heat shield.

Installation Procedure




1. Install the exhaust manifold heat shield to the exhaust manifold.
2. Apply anti-seize GM P/N 12371386 (Canadian P/N 993128) to the exhaust manifold heat shield nuts.

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the exhaust manifold heat shield nuts.

Tighten the nuts to 10 Nm (89 lb in).

4. Install the HO2S to the exhaust manifold. Refer to Heated Oxygen Sensor Replacement - Sensor 1 (Heated Oxygen Sensor Replacement - Sensor 1).




5. Position the automatic transmission filler tube to the AIR adapter if previously removed.
6. Install the automatic transmission filler tube bracket nut.

Tighten the nut to 12.5 Nm (111 lb in).

7. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair).
8. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).