Overheated Engines: Process to Follow When Driving
As your temperature gauge rises higher than normal, going closer to the red zone, you are given the first indicator that your engine is overheating. The second indication is the warning light your vehicle has to tell you the car is running hot. This light is typically found on the dashboard, and you may see steam rising from the bonnet. When any of these signs appear you need to stop driving the vehicle. To continue driving is asking for brutal and costly injury to the engine.
If your vehicle is overheating you need to pull off the street and turn the vehicle off immediately. You do not want to continue to a mechanic garage or station as this will result in irreparable damage to the engine. The cylinder head when it gets too hot will warp or crack, thus replacement is needed in that situation.
Once safely parked on the side of the road, switch on your hazard lights to warn any following drivers of your problem. Providing that there is no fire present you can open the bonnet, to give the engine a chance to cool down, however do not be tempted to touch any of the engine parts at this point, as it is very likely that you will be burnt.
It can take several minutes or hours for the engine to cool. If you have an overheated engine during the night you will want to keep your sidelights running, to help other drivers see your car. You can also turn on the headlights to help you see what you are doing.
Once the engine has cooled down you will probably need to top up the coolant level. In an emergency it is fine to use ordinary water but make sure it is not too cold or it could crack the plastic water reservoir. If you need to add a lot of water to your coolant it will significantly dilute the concentration of the antifreeze within it, and this will eventually need to be remedied by a qualified mechanic to prevent the coolant freezing during the winter.
The filler cap on the coolant can still be extremely hot even after the engine has cooled down. Underneath the cap is pressure which will cause steam to rise when it is released. This could burn your hand. It is imperative to make sure the radiator is cool to the touch, as well as to use a rag to cover your hand when you open the filler cap.
Reaching out at arms length to fill the container will help stop you from being hit with hot coolant. You will want to stop and check the levels of the reservoir to ensure you are not over filling it. There is a maximum and minimum line on the container. You will need to check that the temperature gauge is back to normal levels before driving again.
It is safe to drive if the coolant was the issue; however there could be another issue which has caused the engine to overheat. You will want to avoid long trips until you can get the car into the garage. If the engine gets hot shortly after you begin to drive again, pull over and call for roadside recovery to tow your vehicle to a garage.