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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 888 (Engine Mechanical) >> Intake Manifold >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: To avoid the danger of being scalded, never drain the coolant when the engine is hot.
  1. Remove the engine cover using power tool.
  2. Release the fuel pressure. Refer to "FUEL PRESSURE CHECK ."
  3. Remove air cleaner case (upper) and mass air flow sensor, and air intake tube as an assembly. Refer to "REMOVAL AND INSTALLATION ".
  4. Partially drain the coolant when the engine is cool. Refer to "DRAINING ENGINE COOLANT ".
  5. Disconnect fuel tube quick connector at vehicle piping side.
  6. To remove the quick connector cap, hold the sides of the connector, push in the tabs and pull out the tube.
    NOTE: If the connector and the tube are stuck together, push and pull several times until they start to move. Then disconnect them by pulling.
    CAUTION:
    • The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.
    • Do not use any tools to remove the quick connector.
    • Keep the resin tube away from heat. Be especially careful when welding near the tube.
    • Prevent acid liquids such as battery electrolyte, etc. from getting on the resin tube.
    • Do not bend or twist the tube during removal or installation.
    • Do not remove the remaining retainer on the tube
    • When the tube is replaced, also replace the retainer with a new one.
    • To keep the connecting portion clean and to avoid damage and foreign materials entering, cover the ends of the fuel tubes with plastic bags or something similar.
  7. Disconnect the power brake booster vacuum hose, the coolant hoses from the electric throttle control actuator, the swirl control vacuum lines, the fuel injectors electrical connectors, and the PCV hose.
    CAUTION:
    • Cover any engine openings to avoid the entry of any foreign material.
  8. Disconnect the electric throttle control actuator electrical connectors.
  9. Remove the windshield wiper assembly. Refer to "WIPER MOTOR AND LINKAGE ".
  10. Disconnect the power steering hose bracket.
  11. Remove the vacuum tank from the back of the intake manifold collector (lower).
  12. Remove the intake manifold collector (upper) and electric throttle control actuator by loosening the four bolts in a diagonal pattern.
    CAUTION: Handle carefully to avoid any shock to the electric throttle control actuator.
    Fig 1: Disconnecting Quick Connector
    G04875524Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Applying Plastic Bags To Cover Quick Connector
    G04875526Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Loosen the bolts in the order as shown, and remove the intake manifold collector (lower) using power tool.
    Fig 3: Identifying Intake Manifold Collector (Lower) Bolts
    G04904579Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove the fuel rail with the fuel injectors attached, from the intake manifold. Remove the fuel injector O-rings and use new O-rings for installation.
  15. Loosen the bolts in the order as shown, and remove the intake manifold using power tool.
    Fig 4: Identifying Intake Manifold Bolts With Loosening Sequence
    G04904592Courtesy of NISSAN MOTOR CO., U.S.A.
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