A car can overheat while idling if there is not enough coolant in the radiator or there is a malfunctioning fan, radiator or fan belt. Additionally, some cars have a fan clutch that may cause overheating.Continue Reading
To check a car's coolant levels, allow the car to cool and open the radiator cap. Water should be visible at the top of the radiator. If water is not visible, add the appropriate coolant, typically antifreeze and water, to the radiator and replace the cap. Start the vehicle, and let it idle for several minutes to determine if the problem has been resolved.
If the coolant levels are correct, the problem may be a malfunctioning radiator, cooling fan or fan belt. A radiator leak is typically visible from the bottom of the car. Turn the air conditioning off if necessary, fill the radiator and check under the car for water leaks. Replace the radiator if leaks are present.
The fan and fan belt are also part of the cooling system. Refer to the owner's manual to find out the number and placement of the cooling fans. To determine whether the fan is working properly, turn on the air conditioning and check the engine compartment. If the fan is not turning, the issue may be the fan belt or fan clutch. Replace the faulty part to repair the cooling fan.Learn more about Engine
To check a car’s timing belt, first remove the cover to access the belt, and then inspect the belt for problems such as cracks, contaminants that could cause degradation, and damaged or broken teeth. It is also important to check the belt’s tension to determine if it has become stretched.Full Answer >
Timing marks on a car are used to indicate the pattern of cylinder head movement in the engine relative to the engine's timing belt. They are necessary to ensure that the timing belt is aligned properly with both the cylinders and crankshaft when the belt is replaced during maintenance.Full Answer >
Poorly functioning fans and fan belts, low coolant levels and a dry engine can cause a car to overheat. Drivers can reverse some causes, whereas others are best left to a professional.Full Answer >
When a radiator fan belt breaks, the entire car engine can cease to work. A dead battery is a high possibility. In addition, the break may cause serious damage to the alternator, radiator, steering pump and other parts the belt controls. While some older cars have radiator fan belts, most modern cars have a serpentine belt, which serves the same function but controls many more engine parts.Full Answer >