Intake Manifold (Lower) Removal (7.4L)
WARNING: This page does not describe the selected car, but rather 55 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sonoma, and 1999 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Drain cooling system. Remove upper intake manifold. See INTAKE MANIFOLD (UPPER) . Discharge A/C system (if equipped) using approved refrigerant recovery/recycling equipment. Disconnect suction and discharge lines from A/C compressor. Cap off A/C compressor and A/C lines.
- Mark and remove distributor. Remove Manifold Absolute Pressure (MAP) sensor from lower intake manifold.
- Remove upper radiator hose and thermostat housing. Remove heater and bypass hoses. Remove fuel rail. Remove lower intake manifold mounting bolts. Remove lower intake manifold. See Figure.