What Does it Mean if My Vehicle Overheats?

When a vehicle overheats, it simply means that the temperature of the engine is higher than it is supposed to be.  Driving under those circumstances for any extended period of time can do significant damage to expensive components of your vehicle, including the engine.  Every vehicle has some type of temperature gauge on the dashboard. Usually they are marked with a C for cold on one side and an H for hot on the other.  Periodically observe where your vehicle’s gauge is during normal operation.  Then, if you see that the needle is higher than normal or actually moving toward the hot portion of the gauge, you know something is causing your vehicle to overheat. If overheating is ignored, your vehicle will actually boil over.  If a boil over is occurring or eminent, a warning light and/or audible signal will sound and the needle of the temperature gauge will register completely on the hot side of the gauge. You may observe steam or smoke coming from under your hood. This may be accompanied by a burning scent.  

Early Warning Signs of Overheating and What to do if Overheating Occurs

In addition to the obvious changes in the temperature gauge, several other things usually indicate you are at risk for overheating.  Water and the chemicals in vehicle coolants are necessary to manage engine heat.  Coolant leaks could deplete the coolant supply and result in overheating. In winter months, a coolant leak or reduced coolant level may result in the heater not generating heat. If you observe any sort of puddle under your vehicle after it has been parked, you should have your mechanic investigate what may be leaking. The water and coolant levels in your radiator must be checked periodically.  Have one of our technicians add these items when they are low or out of proportion.  At times these fluids may need to be completely flushed from the system and the system started over with all new coolant.  

When Does Overheating Usually Occur

For obvious reasons, overheating almost always happens in warm weather. If you suspect that your vehicle is overheating, immediately turn off the air conditioner and open the windows.  As soon as possible, look for a safe and convenient place to pull over.  If shutting down the air conditioner is not having an impact on the temperature gauge, you may need to actually run the heater to draw heat off the engine and push it back to the passenger compartment. Once you are able to pull over, allow the vehicle to cool down before checking under the hood.  Do not attempt to remove the radiator cap while the vehicle is hot.  If possible, communicate with one of our mechanics for further instructions. 

Can a Poor Thermostat Cause Overheating

The first and easiest thing to check when a vehicle overheats is the coolant level, but it isn’t the only thing that impacts temperature. Your vehicle’s thermostat plays a crucial role in keeping the passenger compartment comfortable and in keeping the vehicle from overheating.  If you observe any overheating or under heating issues, you may have a thermostat that needs to be replaced or at least repaired on your vehicle. Repeated temperature fluctuations as well as decreased engine performance may be early signs that the thermostat is not functioning properly.