LR
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CoolingHigh severity

200Tdi or 300Tdi overheating

Safety or reliability risk. Fix promptly.

Symptoms

Temperature gauge climbs when towing or climbing hills, coolant loss, steam from the engine bay.

Likely cause

Blocked radiator core, failed viscous fan coupling, sticking thermostat or head gasket failure.

Suggested fixes

Listed roughly in the order most owners try them.

  1. 1

    Check the viscous fan coupling

    With the engine hot and stopped, the fan should resist turning by hand. If it spins freely, replace the coupling.

    Difficulty:
    Easy DIY
    Cost:
    ££ (About £50 to £300)
  2. 2

    Flush or replace the radiator

    Mud between the radiator and intercooler blocks airflow. Clean or fit a new core.

    Difficulty:
    Moderate DIY
    Cost:
    ££ (About £50 to £300)
  3. 3

    Replace the thermostat

    A cheap test. Fit a new thermostat and housing gasket.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)
  4. 4

    Investigate head gasket failure

    If combustion gases are in the coolant, replace the head gasket and check the head for flatness.

    Difficulty:
    Experienced DIY
    Cost:
    ££ (About £50 to £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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