The fuel supply and return lines are constructed from PA nylon tubes and are retained by clips which are made of plastic. The fuel lines are protected under the vehicle by a plastic cover, which is clipped to welded studs.
Within the engine compartment, some fuel lines are produced from steel for improved robustness.
The fuel supply and return lines are separated into three sections. The fuel line connections have quick release couplings at each end to secure them to the fuel tank lines and front end fuel lines.
For additional information, refer to: Quick Release Coupling (310-00 Fuel System - General Information, General Procedures).
Fuel level sensor
CAUTION:Make sure that the fuel tank level sensor float and arm are not damaged during the installation.
NOTE:Make sure that the installation marks are aligned.
The fuel tank must be completely removed from the vehicle before the fuel level sensor unit can be removed.
For additional information, refer to: Fuel Tank (310-01 Fuel Tank and Lines - 1.6L Duratec-16V Ti-VCT (Sigma), Removal and Installation).
Installation of a new fuel level sensor may not solve fuel indication issues which may occur during the vehicles life time.
Fuel filter
1
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Fuel filter to fuel pump fuel supply line
2
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Fuel tank to fuel filter fuel supply line
4
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Fuel filter drain screw
5
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Fuel filter mounting bracket
The 2.0L Duratorq-TDCi (DW) diesel engine fuel filter is located adjacent to the fuel tank The fuel filter has an electric fuel heater which is located next to the fuel filter inlet pipe.
When the temperature is below 15ºC, a valve inside the fuel filter opens allowing fuel which is pre-heated by the fuel pump to be recirculated back through the fuel filter to the fuel pump. This aids engine performance during warm up.
Fuel is delivered through the fuel supply lines to the fuel filter. The fuel filter cleans the fuel of water and contaminants. Unused fuel is returned to the fuel tank through the fuel pump return line.
The fuel filter is also equipped with a water-in-fuel sensor which is located at the base of the fuel filter housing. This sensor measures the amount of water which has collected in the fuel filter element. If the quantity of water present is greater than 90 ml then a warning indicator located on the instrument cluster is illuminated and the fuel filter element should then be drained of water.
When a new fuel filter has been installed it must be bled using a hand pressure pump. Make sure that the arrows indicating the direction of fuel flow is pointing towards the fuel filter.
For additional information, refer to: Fuel Filter (310-01 Fuel Tank and Lines - 1.6L Duratec-16V Ti-VCT (Sigma), Removal and Installation).
Fuel tank vent valve