Jaguar XJ (X350). Manual — part 575

50

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Using the pneumatic vacuum gun, vacuum foreign material from the fuel injection pump,

high-pressure fuel supply line and surrounding areas.

For additional information, refer to Fuel Injection Component Cleaning

51

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CAUTION: Make sure that the tool used to loosen the high-pressure fuel supply line

union is used at the top of the union as this is where there is most material. Failure to

follow this instruction may result in damage to the union.

CAUTION: Make sure that the high-pressure fuel supply line remains in contact

with both the fuel injection pump and the fuel rail until both unions have been detached

and cleaned. Failure to follow this instruction may result in foreign matter ingress to the

fuel injection system.

NOTE:

While maintaining the pressure on the high-pressure fuel supply line, clean and vacuum

foreign material from the line and unions.

Remove the high-pressure fuel supply line.

52 . Remove the fuel rail.

53 . Remove the fuel rail securing bracket .

54 . Remove the engine cover and wiring harness retainers.

55 . Remove the valve cover.

Remove and discard the valve cover gasket.

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Installation

WARNING: Wait at least 30 seconds after the engine stops before commencing any repair to

the high-pressure fuel injection system. Failure to follow this instruction may result in personal

injury.

WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working

on or near any fuel related components. Highly flammable mixtures are always present and may

ignite. Failure to follow these instructions may result in personal injury.

WARNING: This procedure involves fuel handling. Be prepared for fuel spillage at all times

and always observe fuel handling precautions. Failure to follow this instruction may result in

personal injury.

WARNING: Do not carry out any repairs to the fuel injection system with the engine

running. The fuel pressure within the system can be as high as 1650 bar. Failure to follow this

instruction may result in personal injury.

CAUTION: Make sure the workshop area in which the vehicle is being worked on is as clean

and as dust free as possible. Foreign matter from work on clutches, brakes or from machining or

welding operations can contaminate the fuel system and may result in later malfunction.

CAUTION: Do not disconnect the fuel injector electrical connectors with the engine running.

Failure to follow this instruction may result in damage to the vehicle.

CAUTION: Always carry out the cleaning process before carrying out any repairs to the fuel

injection system components. Failure to follow this instruction may result in foreign matter ingress

to the fuel injection system.

CAUTION: Diesel fuel injection equipment is manufactured to very precise tolerances and

fine clearances. It is therefore essential that absolute cleanliness is observed when working with

these components. Always install blanking plugs to any exposed ports.

1 . Install the valve cover.

Install a new valve cover gasket.

Tighten to 10 Nm.

2 . Install the engine cover and wiring harness retainers.

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