| Cooling System Repairs |
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The simplest and most common repair to cooling systems is replacing the thermostat. Car Words A thermostat is a valve that opens and closes based on temperature, regulating the flow of coolant in an engine. Thermostats have a specific temperature range, called a set point at which they open or close to keep the coolant’s temperature within the designated range. Replacing the thermostat on your car may be easy or difficult, depending on how the engine was designed. On most cars, the thermostat is located inside a metal housing between the engine and the radiator’s top hose. So replacement requires that you drain coolant from the system, remove the hose, remove the housing, and finally remove the thermostat. Install a new one in reverse order. Make sure that you install an exact replacement thermostat because they have different temperature set points. Modern radiators are much smaller than their grand-daddies. So removal should be easier. However, because of tight clearances in modern engine compartments, radiator removal and replacement may require moving everything else. The usual steps are: 1. Drain the cooling system. 2. If your car is equipped with an automatic transmission, disconnect its coolant lines from the radiator. 3. Loosen the radiator hose clamps and detach the hoses. 4. If the cooling fan (pictured) is attached to the radiator, remove it. 5. Loosen and remove bolts holding the radiator to its frame. 6. Remove any other components that are attached to or in the way of removing the radiator. 7. Carefully lift the radiator from the frame. 8. Reinstall the radiator and coolant in reverse order.
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Repairs to the engine’s cooling system typically mean replacing the coolant pump, the fan, or the radiator. The coolant pump and fan typically are replaced as a unit by draining coolant from the engine, removing the pump belt, and disconnecting the pump from the engine.
