Exhaust Manifold Heat Shield Replacement

Exhaust Manifold Heat Shield Replacement (LLR - 3.7L)

Removal Procedure
Caution: Refer to Exhaust Service Caution (Service Precautions) .
Caution: Refer to Protective Goggles and Glove Caution (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 M30, remove the transmission filler tube bracket nut from the A.I.R. adapter, and position aside.
4. Remove the heated oxygen sensor (HO2S) from the exhaust manifold. Refer to Heated Oxygen Sensor 1 Replacement (Service and Repair) .




5. Remove the 4 nuts securing the heat shield to the exhaust manifold.
6. Remove the exhaust manifold heat shield from the exhaust manifold.

Installation Procedure




1. Position 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.

Notice: Refer to Fastener Notice (Fastener Notice) .

3. Install the exhaust manifold heat shield nuts.

Tighten the nuts to 10 N.m (89 lb in).

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




5. Position the transmission filler tube to the A.I.R. adapter if previously removed.
6. Install the transmission filler tube bracket nut.

Tighten the nut to 12.5 N.m (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) .