Exhaust Manifold Heat Shield Replacement

Exhaust Manifold Heat Shield Replacement
Removal Procedure

Caution: Refer to Exhaust Service Caution in Service Precautions.

Caution: Refer to Protective Goggles and Glove Caution in Service Precautions.





1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 3.5L (L52).
2. Remove the air cleaner assembly.
3. If equipped with an automatic transmission, remove the transmission filler tube bracket nut from the secondary air injection (A.I.R.) adapter, and position aside.
4. Remove the heated oxygen sensor (HO2S) from the exhaust manifold.





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.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the exhaust manifold heat shield nuts.
Tighten the nuts to 10 Nm (89 inch lbs.).
4. Install the HO2S to the exhaust manifold.





5. Position the automatic transmission filler tube to the A.I.R. adapter if previously removed.
6. Install the automatic transmission filler tube bracket nut.
Tighten the nut to 12.5 Nm (111 inch lbs.).
7. Install the air cleaner assembly.
8. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 3.5L (L52).