Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
Vehicle » Powertrain Management » Fuel Delivery and Air Induction » Service Precautions » Fuel System General Precaution  
  Fuel System General Precaution  


General Precaution

When replacing fuel line parts, be sure to observe the following.

  • Put a "CAUTION: FLAMMABLE" sign in the work area.
  • Be sure to work in a well ventilated area and have a CO2 fire extinguisher.
  • Do not smoke while working on the fuel system. Keep open flames and sparks away from the work area.


  • Before removing fuel line parts, carry out the following procedures:
  • Put drained fuel in an explosion-proof container and put the lid on securely. Keep the container in safe area.
  • Release fuel pressure from the fuel lines. Refer to (QR25DE for California), (QR25DE except for California), See: Fuel Pressure\Testing and Inspection (VQ35DE).
  • Disconnect the battery ground cable.
  • Always replace O-rings and clamps with new ones.
  • Do not kink or twist tubes when they are being installed.
  • Do not tighten hose clamps excessively to avoid damaging hoses.


Tighten high-pressure rubber hose clamp so that clamp end is 3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber hose clamps.
Ensure that screw does not contact adjacent parts.

  • After connecting the fuel tube quick connectors, make sure the quick connectors are secure. Check that the connector and resin tube do not contact any adjacent parts.
  • a) Apply fuel pressure to the fuel system by turning the ignition switch to ON (without starting the engine). Then check for fuel leaks at the fuel tube connections.
  • b) Start the engine and rev the engine, then check for fuel leaks at the fuel tube connections.
  • After installing the tubes, run the engine and check for fuel leaks at the connections.
  • Use only a Genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.