K 1500 Truck 4WD V8-4.8L VIN V (2003)
Installation Procedure
Notice:
Refer to Fastener Notice in Service and Precautions.
1. Install the heat shield (2), and bolts (1) to the exhaust manifold (1), if necessary.
Tighten the bolts to 9 Nm (80 inch lbs.).
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 threadlocking material.
Important: Do not apply sealant to the first three threads of the bolt.
2. Apply a 5 mm (0.2 inch) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the exhaust
manifold bolts.
3. Install the exhaust manifold, NEW gasket and bolts.
3.1.
Tighten the bolts a first pass to 15 Nm (11 ft. lbs.). Tighten the bolts beginning with the center 2 bolts. Alternate from side-to-side, and
work toward the outside bolts.
3.2.
Tighten the bolts a final pass to 25 Nm (18 ft. lbs.). Tighten the bolts beginning with the center 2 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 front of the right cylinder head.
5. Install the spark plugs.
6. Raise the vehicle.
