Nissan 240SX/Altima 1993-1998 Repair Guide

Fuel Filter


Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

The fuel filter contains a paper element that keeps most dirt and sediment from entering the fuel system. Clean fuel is especially important on fuel injected engines, due to the small orifice size of the injectors. Even the smallest piece of dirt could clog an injector, causing serious engine performance problems.

Although the manufacturer does not give a specific inspection or replacement schedule, it is a good idea to replace the filter at 30,000 mile (48,300 km) intervals.


See Figure 1

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Fig. Fig. 1: The fuel filter is attached to a bracket on the firewall. Always plug fuel lines after disconnecting them from the filter

  1. Properly relieve the fuel system pressure.
  3. Disconnect the negative battery cable.
  5. Place shop rags over the engine, beneath the fuel hoses and filter, to prevent fuel spillage.
  7. Loosen the fuel hose clamps.
  9. Remove the fuel filter.

To install:
  1. Position a new, high pressure type fuel filter in the engine compartment.
  3. Install the fuel hoses and position the hose clamps so they are 0.12 in. (3mm) from the hose ends. Tighten the clamps.
  5. Connect the negative battery cable.
  7. Start the engine and check for leaks.