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How hot is a car engine when it runs?

The temperature of a car engine can vary depending on the type of engine, the vehicle's make and model, and the operating conditions. However, here are some general guidelines:

1. Normal Operating Temperature: Most modern car engines are designed to operate at a normal temperature range of around 195 to 220 degrees Fahrenheit (90 to 105 degrees Celsius). This temperature allows the engine to function efficiently and smoothly.

2. Higher Temperatures: Under certain circumstances, such as heavy traffic or prolonged idling, the engine temperature can rise above the normal range. This is especially common in hot weather conditions. In such cases, the engine coolant temperature can reach up to 240 degrees Fahrenheit (115 degrees Celsius) or even higher.

3. Engine Overheating: If the engine temperature exceeds safe limits and reaches extremely high levels, it is considered engine overheating. This can be caused by various factors, such as a coolant leak, faulty thermostat, or a problem with the cooling system. Engine overheating can lead to serious damage to various engine components, including head gasket failure, piston damage, and engine seizure.

4. Engine Coolant Temperature: The engine coolant temperature is an important indicator of the engine's overall health and performance. Most vehicles have a temperature gauge in the instrument cluster that displays the coolant temperature. Drivers should monitor the temperature gauge to ensure that the engine is running within the normal range. If the temperature gauge indicates overheating, it's important to pull over and turn off the engine to prevent further damage.

It's worth noting that some high-performance engines or vehicles designed for extreme conditions may have different temperature ranges specified by the manufacturer.