by Benjamin Yong
If your engine overheats while on the road, here’s our advice for handling the situation with confidence.
After a long, hot summer, the high temperatures can have a taxing effect on your vehicle — fluids are depleted, and some components, like the radiator, have been working harder. On older cars in particular, this can lead to engine overheating, although newer models aren’t immune either if there are any issues with the cooling system.
And if you're curious exactly why this annoying (and potentially fatal to your car's health) incident even occurs, how it happens, and the various components involved like the cooling system, here's a great breakdown by Jason Unrau at YourMechanic.com.
In the instrument cluster, there is either a physical or digital gauge marked with a small thermometer or Celsius symbol that measures the coolant temperature of the engine. The needle usually sits near the middle when everything is working as it should, but if you notice it creeping towards the hot side, that means there’s a problem. In such a situation...
Keep this checklist in mind for overheated engines:
If You’re Still In Traffic...
1. Engines Off
The engine powers the air conditioner, so if your car is equipped with one, turn it off to reduce strain on the motor and roll down your windows instead.
2. Release the Heat
Turn on the blower and set the climate control to hot, to draw heat away from the engine and out through the air vents instead. Make sure all the windows are down when you do this so you don’t overheat.
3. Circulate the Air
Stuck in gridlock? Put the car into neutral or park and tap the gas pedal slightly for a few seconds. The increase in rpms will get the fan and water pump working, which circulates air and liquid through the radiator.
Pull Over When Safe To Do So...
4. Turn off Ignition When Possible
If possible, find a safe place to pull over and turn off the ignition immediately, as continued operation can damage the engine.
5. Hood Open
Open the hood to cool things down, being mindful you might be greeted with a face full of steam. It’s a good idea to wait a few minutes.
6. Check Things Out
Do a quick check for the problem. Locate your coolant tank somewhere near your radiator that is supposed to be full of colourful coolant. If it’s empty, it may just need a fill or there could be a leak somewhere in the system. Check the ground underneath for any puddles.
7. If You Have to Drive
Option: if you must keep driving a little further, once things are no longer boiling hot, you can add a little water or coolant directly to the radiator to get you a few more kilometres. Wait for at least 20 minutes to let the motor cool down first before attempting to remove the radiator cap, which by then should be cool to the touch. Place something like a cloth overtop to protect your hand.
8. Call the Pros
If you’d rather leave it to the pros, call a tow truck right away and have your service department diagnose the problem. Possible issues could range from worn belts/hoses, to a broken water pump or thermostat.
In conclusion - here it is again listed out: