Exhaust Manifold Replacement - Right

Exhaust Manifold Replacement - Right





1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the surge tank bolt and position the surge tank aside.
3. Remove the exhaust manifold pipe nuts.
4. Lower the vehicle.
5. Remove the spark plugs.
6. Remove the engine oil level indicator tube.





7. Remove the heat shield bolts (1) and shield (2) from the exhaust manifold (1).





8. Remove the exhaust manifold bolts, manifold, and gasket.
9. Discard the gasket.
10. Clean and inspect the exhaust manifold.

Installation Procedure





1. Important:
^ Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.
^ The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or thread locking material.

Important: Do not apply sealant to the first 3 threads of the bolt.

Apply a 5 mm (0.2 inch) wide band of thread lock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts.

2. Notice: Refer to Fastener Notice in Service Precautions.

Install the exhaust manifold, NEW gasket, and bolts.
1. Tighten the exhaust manifold bolts a first pass to 25 Nm (18 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.
2. Tighten the exhaust manifold bolts a final pass to 25 Nm (18 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.
3. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the front of the right cylinder head.





4. Install the heat shield (2) and bolts (1) to the exhaust manifold (1).
^ Tighten the bolts to 9 Nm (80 inch lbs.).
5. Install the engine oil level indicator tube.
6. Install the spark plugs.
7. Install the surge tank.
8. Raise the vehicle.





9. Install the exhaust manifold pipe nuts.
^ Tighten the nuts to 50 Nm (37 ft. lbs.).
10. Lower the vehicle.