Service Manual

Fuel Supply Lines ISB, ISBe and QSB (Common Rail [...]
Page 6-62 Section 6 - Injectors and Fuel Lines - Group 06
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Inspect for burrs or debris on metal connectors that may
cause leaks.
On quick-disconnect fittings, be certain that the o-rings
are not frayed or cut, and that the lock tangs are not
damaged.
Inspect the face of the banjo connector for sealing surface
damage.
Use new sealing washers during installation.
Replace the fuel lines if damaged.
Inspect the straight thread fittings and fuel lines for cracks,
bends or any damage.
Inspect and replace o-rings if damaged.
Replace the fuel lines as necessary.
Inspect the face of the banjo connector for sealing surface
damage.
Replace the banjo bolts, sealing washers or fuel lines as
necessary.