Jaguar XJ (X350). Manual — part 1108

Fuel Tank and Lines - VIN Range: G45704-
>G99999

Vehicles without Diesel Engine

Item

Part Number

Description

1

Fuel tank filler pipe

2

Fuel transfer module

3

Fuel tank

4

Fuel pump module

Vehicles with Diesel Engine

Item

Part Number

Description

1

Auxiliary heater fuel supply pump

2

Fuel tank ventilation filter

3

Left-hand fuel level sensor module

4

Fuel tank

5

Right-hand fuel pump module

Fuel Tank

Vehicles without Diesel Engine

The fuel tank is of a plastic construction and is retained to the vehicle by means of two steel support

straps. The fuel tank support straps are mounted onto the underside of the vehicle chassis towards

the front of the fuel tank and bolt to the vehicle towards the rear of the fuel tank. Fuel tank

ventilation is achieved through a fuel tank roll-over valve into an evaporative emission canister which

absorbs fuel tank vapor. The fuel tank roll-over valve is integral to the fuel tank and will prevent fuel

loss from the fuel tank if the vehicle becomes inverted.

Vehicles with Diesel Engine

The fuel tank is of a plastic construction and is retained to the vehicle by means of two steel support

straps. The fuel tank support straps are mounted onto the underside of the vehicle chassis towards

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the front of the fuel tank and bolt to the vehicle towards the rear of the fuel tank. Fuel tank

ventilation is achieved through a fuel tank roll-over valve into a ventilation filter. The fuel tank roll-

over valve is integral to the fuel tank and will prevent fuel loss from the fuel tank if the vehicle

becomes inverted.

Fuel Filter

Vehicles without Diesel Engine

The fuel filter is of a conventional construction being that of a paper element sealed within a steel

canister. The fuel filter is located behind the left-hand front fender splash shield.

Vehicles with Diesel Engine

The diesel fuel filter is located in the engine compartment. Incorporated in to the fuel filter housing is

a bimetallic valve which will start to close at 30°C (86°F) and will fully close at 50°C (122°F).

When the bimetallic valve is open, fuel is only allowed to pass through the fuel cooler in the engine

vee, which aids warm up of the fuel at low temperatures. When the fuel temperature increases, the

bimetallic valve closes, diverting fuel through the under-floor fuel cooler which then lowers the fuel

temperature before returning the fuel back to the fuel filter.

The fuel filter has an air bleed return to the fuel tank which returns excess air and fuel back to the

fuel tank.

Fuel Tank Filler Pipe

The fuel tank filler pipe is of stainless steel construction and is retained to the vehicle by means of

one lower retaining bolt, one lower retaining nut and one upper retaining nut. The fuel tank filler

pipe is fitted with a twist-fit filler cap, which seals the system.

Inertia Fuel Shutoff (IFS) Switch

The inertia fuel shutoff (IFS) switch is designed to cut power to the fuel pump in the event of an

accident. It is located behind the left-hand cowl side trim panel.

Fuel Modules

Vehicles without Diesel Engine

As the fuel tank is of a saddle design, a fuel pump module and a fuel transfer module are

incorporated.

The fuel pump module is an electric turbine type pump and is located inside the fuel tank, on the

right-hand side. Both the fuel pump and fuel transfer module feature an integral fuel tank sender

unit and each is retained to the fuel tank by means of a locking ring.

Vehicles with Diesel Engine

The fuel pump is an electric turbine type and is located in the right-hand side of the fuel tank. The

fuel pump supplies fuel to the fuel injection pump and also circulates fuel from the left-hand side of

the fuel tank by means of fuel transfer pipes incorporated in the fuel pump module.

The fuel tank incorporates two fuel level sensors, one in the right-hand fuel pump module and one in

the left-hand fuel tank level sensor. Both the fuel pump and fuel tank level sensor modules are

retained to the fuel tank by means of a locking ring.

Fuel cooler

Vehicles with Diesel Engine

Two fuel coolers are fitted to the vehicle. One is located in the vee of the engine block, which has a

coolant connection to aid heat transfer. The second cooler is located in the fuel return line and is

located under the vehicle on the left-hand side. Fuel flow through the underfloor cooler is controlled

by the fuel filter.

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