Exhaust Manifold Heat Shield Replacement

Exhaust Manifold Heat Shield Replacement (L52)

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.
2. Remove the air cleaner assembly.
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.





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 in Service Precautions.

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





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 transmission filler tube bracket nut to 12.5 Nm (111 inch lbs.).
7. Install the air cleaner assembly.
8. Install the air cleaner outlet duct.