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Home >> GMC >> 1998 >> Jimmy 4D Utility, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 4.3L V6, 5.0L, 5.7L & 7.4L V8 - VINS [W,X,M,R,J] >> Removal & Installation >> Intake Manifold (Lower) >> Intake Manifold (Lower) Removal (7.4L)

Intake Manifold (Lower) Removal (7.4L)

  1. 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.
  2. Mark and remove distributor. Remove Manifold Absolute Pressure (MAP) sensor from lower intake manifold.
  3. 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.
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