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2 Cooling system XF engine DIAGNOSIS 3-1 3. COOLING SYSTEM XF ENGINE 3.1 FAULT-FINDING TABLE FAULT: ENGINE TEMPERATURE INCREASES Possible cause Remedy Incorrect injection timing or incorrect fuel pump Check the injection timing and/or fuel pump Incorrect injectors installed. Check whether the correct injectors have been Inlet system failure. Check the inlet system. Lubrication system failure. Check the lubricating-oil system. Incorrect V-belt tension. Check the V-belt tension or replace the V-belt. Insufficient coolant. Check the coolant level. Top up if necessary. Coolant pipe torn or blocked. Check the coolant pipes. Contaminated radiator/cooling system. Check the radiator. Clean if necessary. Incorrect or malfunctioning pressure cap. Check the pressure cap. Thermostat opens insufficiently or not at all. Check the thermostat and its operation. Contaminated coolant filter. Check the coolant filter. If necessary, replace Defective water pump. Check the water-pump shaft, bearings and Defective viscous fan. Check operation of viscous fan. 1 ǹ 0008 |