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Home >> Isuzu >> 1992 >> Impulse XS, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.6L 4-CYL - VINS [4,5,6] & 1.8L 4-CYL - VIN [8] >> Removal & Installation >> Cylinder Head >> Removal (DOHC Turbo)

Removal (DOHC Turbo)

  1. Release fuel pressure. See FUEL PRESSURE RELEASE  under REMOVAL & INSTALLATION. Disconnect negative battery cable. Mark hood and hood hinge for reassembly reference. Remove hood.
  2. Drain cooling system. Remove left and right undercovers. Remove intercooler. See INTERCOOLER  under REMOVAL & INSTALLATION. Disconnect accelerator cable from upper intake manifold. Disconnect breather hose.
  3. Remove air cleaner housing, ducting and element. Disconnect Manifold Absolute Pressure (MAP) sensor vacuum hose. Disconnect vacuum hose for brake booster. Disconnect 2 canister hoses from pipes attached to upper intake manifold.
  4. Disconnect O2 sensor connector. Disconnect Throttle Position Sensor (TPS) connector from throttle valve assembly. Disconnect coolant temperature sensor connector and thermo unit connector.
  5. Disconnect 2 wiring harness connectors (12-pin and 16-pin) near left strut tower. Disconnect ground cables from upper intake manifold. Disconnect ground cable for cam angle sensor bracket from battery tray.
  6. Remove upper radiator hose. Disconnect throttle valve coolant hoses. Remove coolant by-pass pipe from cylinder head. Disconnect fuel inlet and return hoses.
  7. Remove intercooler bracket with wastegate Vacuum Switching Valve (VSV). Remove alternator harness clip from upper intake manifold. Disconnect oil cooler lines. Disconnect clutch cable. Remove heat shield from manifold converter.
  8. Remove manifold converter from wastegate manifold. Disconnect coolant outlet hose from turbocharger. Remove turbocharger oil feed pipe joint bolt from cylinder block.
  9. Remove coolant recovery tank with bracket. Remove 2 bolts attaching power steering pump to engine. Position power steering pump with hoses attached out of way.
  10. Support engine. Remove cruise control pump and VSV (if equipped). Remove right side engine mount with bracket. Remove valve cover center cover. Remove spark plug wires. Disconnect PCV hose. Remove upper timing belt cover. Remove power steering pump bracket.
  11. Remove valve cover. Remove timing belt. See TIMING BELT  under REMOVAL & INSTALLATION. Remove cylinder head bolts in proper sequence. See Figure .
  12. Hoist cylinder head assembly enough to disconnect knock sensor connector and boost hose from boost meter. Remove cylinder head assembly from vehicle.
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