Like any vehicle, Range Rovers run best when the engine is kept at a constant, ideal temperature. The Range Rover's cooling system keeps the engine running well by cooling the engine with antifreeze to prevent overheating. When the cooling system's thermostat malfunctions, it can cause the vehicle to overheat.
The thermostat is an essential part of the cooling system that helps to regulate a Range Rover's engine temperature. If the engine temperature is too cool, the vehicle may have a bad fuel economy and a high level of emission. If the engine temperature is too hot, the engine can overheat and self-destruct. The thermostat is a small component that is mounted between the radiator and the engine. The thermostat will remain closed when the engine is warming up. When the engine has reached an ideal temperature, the thermostat opens to let antifreeze in, which cools the radiator and maintains the engine temperature.
If a Range Rover's thermostat breaks, it can cause the cooling system to function improperly. Problems often occur when the thermostat becomes stuck in one place. If a thermostat gets stuck in the open position, the engine will be cooled before it ever heats to the ideal temperature. If a thermostat gets stuck in the closed position, the engine will become too warm and overheat. Driving a vehicle for too long while it is overheating can melt the engine and cause permanent damage.
If your Range Rover is overheating, a broken thermostat might be to blame. Thermostats aren't expensive to replace compared to other components of the cooling system. To locate the thermostat, open the engine cover and look for a raised housing with a radiator hose entering on one side. To replace the thermostat, remove it from its housing discard. Buy a new thermostat and place it in the housing. Install the new thermostat with the bleed hole at the top.
Many other components of the cooling system can cause the engine to overheat. The first sign of a cooling system problem is a low coolant level sensor. Radiator fins plugged with debris can prevent the system from cooling properly. Often times, the coolant pump or tubes may be damaged. Whatever the case, the cooling system leaks and failures are common in Range Rovers, and must be repaired immediately to avoid meltdowns due to overheating.
General maintenance can prevent your Range Rover's coolant system from failing. The Range Rover's cooling system hoses wear out, so replace them every three to four years. In addition, you should periodically unbolt the radiator to clean out debris in the cooling fan.