LR
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Fuel systemMedium severity

Diesel leaking from the Tdi injection pump

Will get worse if left.

Symptoms

Diesel weeping from the top of the Bosch pump or the throttle shaft, smell of fuel, possible air in the system and hard starting.

Likely cause

Hardened seals on the pump top cover, throttle shaft or fuel inlet.

Suggested fixes

Listed roughly in the order most owners try them.

  1. 1

    Fit a pump top cover seal kit

    Seal kits are available for the top cover and throttle shaft. Work cleanly and take care not to disturb the fuelling setting.

    Difficulty:
    Moderate DIY
    Cost:
    £ (Under about £50 in parts)
  2. 2

    Renew the banjo washers

    Leaks at the fuel inlet and return are often just old copper washers. Fit new ones and torque correctly.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)
  3. 3

    Have the pump overhauled

    If the pump leaks from several places or the shaft is worn, a diesel specialist can rebuild it.

    Difficulty:
    Specialist job
    Cost:
    £££ (Over about £300)

This is general guidance gathered from owner experience and workshop practice, not a substitute for a workshop manual or a qualified mechanic. Costs are rough parts-only guides. Brakes, steering and suspension work affects safety, so if in doubt have it checked professionally.

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