C 1500 Truck 2WD V8-6.0L VIN U (2002)
7. Remove the heat shield bolts (3), and shield (2) from the exhaust manifold (1), if necessary.
8. Clean and inspect the exhaust manifold.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the heat shield (2), and bolts (3) to the exhaust manifold (1), if necessary.
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Tighten the exhaust manifold heat shield bolts to 9 Nm (80 inch lbs.).
Important:
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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.
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The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.
Important: Do not apply sealant to the first three threads of the bolt.
2. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N United States 12345493, GM P/N Canada 10953488, or equivalent to the threads of the
exhaust manifold bolts.
3. Install the exhaust manifold, NEW gasket and bolts.
3.1.
Tighten the exhaust manifold bolts a first pass to 15 Nm (11 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center two bolts.
Alternate from side-to-side, and work toward the outside bolts.
3.2.
Tighten the exhaust manifold bolts a final pass to 25 Nm (18 ft. lbs.). Tighten the exhaust manifold bolts beginning with the center two
bolts. Alternate from side-to-side, and work toward the outside bolts.
4. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the rear of the left cylinder head.
5. Install the spark plugs.
6. Raise the vehicle.
