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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (5.6L) (Except Hybrid) >> Removal And Installation >> Intake Manifold >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
  1. Remove engine cover. Refer to Exploded View .
  2. Remove air duct (inlet) and air duct. Refer to Exploded View .
  3. Disconnect harness connector and harness bracket (bank 2 rear side).
  4. Remove engine cover bracket. Refer to Exploded View .
  5. Disconnect air flow sensor harness connector.
  6. Remove air flow sensor harness connector clip from intake manifold.
  7. Remove vacuum tank, EVAP service port hose and EVAP canister purge control solenoid valve.
  8. Disconnect PCV hoses and vacuum hose from intake manifold.
    • Add matching marks as necessary for easier installation.
  9. Drain engine coolant from radiator. Refer to Draining .
    CAUTION:
    • Perform this step when the engine is cold.
    • Never spill engine coolant on drive belts.
    NOTE: When removing only intake manifold, move electric throttle control actuator without disconnecting the water hoses.
  10. Remove Electric Throttle Control Actuator.
    • Loosen mounting bolts in reverse order as shown in the figure, below.
      Fig 1: Electric Throttle Control Actuator Bolts Tightening Sequence
      GNSJPBIA2362Z-362Courtesy of NISSAN NORTH AMERICA, INC.
    NOTE:
    • The figure shows the electric throttle control actuator (bank 1) viewed from the air duct side.
    • Viewed from the air duct side, the order of loosening mounting bolts of electric throttle control actuator (bank 1) is the same as that of the electric throttle control actuator (bank 2).
    CAUTION:
    • Handle carefully to avoid any impact to electric throttle control actuator.
    • Never disassemble.
  11. Remove engine harness clip on rocker cover.
  12. Remove water pipe mounting bolts. Refer Exploded View .
  13. Remove water pipe mounting bolts (intake manifold back side). Refer Exploded View .
  14. Remove high pressure fuel pump insulator. Refer to Exploded View .
  15. Remove harness bracket (intake manifold back side).
  16. Remove intake manifold.
    • Loosen mounting bolts in reverse order as shown in the figure, below.
      Fig 2: Intake Manifold Mounting Bolt Tightening Sequence
      GNSJPBIA3535Z-535Courtesy of NISSAN NORTH AMERICA, INC.

    SYMBOL

    : Engine front
  17. Remove intake manifold gaskets.
    CAUTION: Cover engine openings to avoid entry of foreign materials.
  18. Remove manifold absolute pressure (MAP) sensor, if necessary.
    CAUTION: Handle carefully to avoid any impact to manifold absolute pressure (MAP) sensor.
  19. Remove acoustic absorbent.
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