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Fuel lines and fittings - general information
Fuel and exhaust systems / Fuel lines and fittings - general information


Warning: The fuel system pressure must be released before any part of the system is disturbed - see Section 2. Petrol is extremely flammable, so take extra precautions when you work on any part of the fuel system. DonТt smoke, or allow open flames or bare light bulbs, near the work area. DonТt work in a garage where a natural gas-type appliance (such as a water heater or clothes dryer) with a pilot light is present. If you spill any fuel on your skin, rinse it off immediately with soap and water. When you perform any kind of work on the fuel system, wear safety glasses, and have a Class B type fire extinguisher on hand.

Disconnecting and connecting quick-release couplings
1 Quick-release couplings are employed at all unions in the fuel feed and return lines.

2 Before disconnecting any fuel system component, relieve the residual pressure in the system (see Section 2), and equalise tank pressure by removing the fuel filler cap.

Warning: This procedure will merely relieve the increased pressure necessary for the engine to run - remember that fuel will still be present in the system components, and take precautions accordingly before disconnecting any of them.

3 Release the protruding locking lugs on each union, by squeezing them together and carefully pulling the coupling apart. Use rag to soak up any spilt fuel. Where the unions are colour-coded, the pipes cannot be confused.

Where both unions are the same colour, note carefully which pipe is connected to which, and ensure that they are correctly reconnected on refitting (see illustration).

3.3 Disconnect fuel line quick-release couplings by squeezing together
3.3 Disconnect fuel line quick-release couplings by squeezing together protruding locking lugs and pulling coupling apart

4 To reconnect one of these couplings, press them together until the locking lugs snap into their groove. Switch the ignition on and off five times to pressurise the system, and check for any sign of fuel leakage around the disturbed coupling before attempting to start the engine.

Checking
5 Checking procedures for the fuel lines are included in Chapter 1.

Component renewal
6 If you must renew any damaged sections, use original-equipment replacement hoses or pipes, constructed from exactly the same material as the section you are replacing. Do not install substitutes constructed from inferior or inappropriate material, or you could cause a fuel leak or a fire.

7 Before detaching or disconnecting any part of the fuel system, note the routing of all hoses and pipes, and the orientation of all clamps and clips. Replacement sections must be installed in exactly the same manner.

8 Before disconnecting any part of the fuel system, be sure to relieve the fuel system pressure (see Section 2), and equalise tank pressure by removing the fuel filler cap. Also disconnect the battery negative (earth) lead - see Chapter 5, Section 1. Cover the fitting being disconnected with a rag, to absorb any fuel that may spray out.


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