This blog post will answer the question, ‘What is the optimum car engine coolant temperature?’, and cover topics like causes of an engine that overheats, symptoms of a car engine that overheats, and how to prevent this problem, and steps to take to deal with this problem.
What is the optimum car engine coolant temperature?
The optimum car engine coolant temperature should be between 190-225F. In case the car is running on a temperature exceeding this range, it is considered to be overheating and needs to be pulled over to either refill the coolant or just to let it cool off in an enclosed area.
What happens if my car engine coolant temperature is high?
In case the car is running at a coolant temperature higher than the optimal operating temperature, the car can suffer from overheating. This severe issue can cause further damage to the car if not fixed with immediate effect.
An overheating engine can cause most of its crucial components to fail. It mainly happens due to a coolant leakage from the radiator or a wrong thermostat. A defective water pump or a cooling fan can also cause this problem.
Causes of an engine that overheats
These are the following causes that influence a car engine overheating
Leakage of coolant
The cooling system of the engine is responsible for maintaining a normal operating temperature for the engine and for sucking away all the heat. It comprises the water pump, radiator, coolant hoses, a head gasket, and a thermostat.
These components are crucial for helping the cooling system function optimally and with time and frequent use they can get worn out or even broken, thus causing the coolant to leak out everywhere and hindering the cooling of the engine.
Obstructed hose pipes
In the event of no coolant leakage, the problem might lie in the hose pipes that have been clogged or obstructed due to the accumulated dirt and other debris from the roads, thus hindering the flow of coolant to the engine.
Defective water pump
The water pump is responsible for transporting the coolant material to the engine and can get damaged or worn out after frequent use. It is advisable to take a look at the bump shaft and impeller vanes of the water pump if they are working optimally.
The radiator is another vital component of the car’s cooling system and helps to suck out the heat from the engine coolant, thus allowing it to be recirculated to the engine to cool it.
At times the radiator can face a broken fan or clogged channels and thus hinder the escape of the heat from the coolant thus keeping both the coolant and the engine hot. The radiator cap might also be loose or broken.
Insufficient oil levels
Oils that are meant for the car act as both a lubricant for moving components and a cooling agent for the internal temperatures of the engine.
Low oil levels will result in lower cooling being done for the engine and all its components and also cause a lot of friction between moving components as they rub against each other without any lubrication.
The thermostat is responsible for opening and closing whenever needed to keep the engine at a normal operating temperature. If it gets stuck in either an open or closed position, it can cause the engine to overheat.
Symptoms of a car engine that overheats
These are the following symptoms that help in identifying an overheating car engine.
The temperature gauge reads red
The temperature gauge is vital for determining the car temperature and it consists of a needle that points to the current state of the car. The needle should almost always stay clear of the red area that indicates the car is overheating.
Fumes from under the hood
The car engine when overheated will cause fumes to radiate out of the engine hood, that might be caused due to a faulty radiator that prevents the heat from escaping from the engine coolant.
A car engine is made up of different components like metal, plastic, and rubber. In case of the engine overheating, a distinct burning smell is present inside the cabin and should be tended to immediately.
Weak engine performance
An overheating engine will result in a drop in engine performance, and trying to accelerate or get more out of the car will result in no results as the car will fail to meet any of the demands.
How to prevent this problem?
The problem of a car engine overheating can be prevented by adhering to the following protocols:
- The engine coolant level must be checked on a regular basis, as it is the primary source of cooling for the engine, and also the first suspect in the case of an overheating engine.
- The temperature gauge should not be ignored, as the needle pointing to the red zone can indicate severe overheating of the car engine. The temperature gauge should not be broken or defective, or else it becomes difficult to make out the true state of the engine.
- In case the car AC is on, and the temperature keeps rising, switch it off and after opening the doors and windows, turn on the heater to suck in the heat from the engine into the cabin and send it outside.
- Make sure to check for leaking coolant puddles under the car, and also replace the old coolant with a newer one whenever needed.
- A faulty thermostat must be replaced immediately as it is tasked with regulating the flow of coolant within the engine.
- A broken or worn-out timing belt needs replacement as well, as it helps run the water pump for the coolant circulation within the engine.
- Regularly inspect the radiator cap to make sure it is tightly sealed to keep the coolant under optimal pressure conditions.
Steps to take to deal with this problem
These are the following steps to be taken while trying to tackle this problem:
- The car must be parked in a cool and enclosed space immediately to help in cooling it off
- The air conditioner must be turned off and switched to heater mode, as the heater will allow sucking in the excess heat from the car
- In case of low coolant or oil levels, they must be added immediately.
- Check the thermostat if it is stuck open or closed
- Restart the engine and try to drive slowly, pull over in case of the temperature gauge reads red again
- For a deeper analysis of the problem, it is advisable to consult a professional mechanic or have the car towed to the nearest automotive repair shop.
Research has shown the different types of coolants and the various factors that need to be taken into consideration when selecting the best engine coolant for your car.
This blog post addressed the question, ‘What is the optimum car engine coolant temperature?’
We came across what can happen if the car engine operates on a coolant temperature higher than the optimal range, the various causes of an overheating car engine, the symptoms of this condition, and the various ways to prevent this scenario from taking place, along with steps to tackle it. Please feel free to comment on the content or ask questions in the comments section below.
Frequently Asked Questions (FAQs): What is the optimum car engine coolant temperature?
What temperature is considered overheating in a car?
An engine with an operating temperature of more than 220F is considered to be an overheating engine.
What temp is too high for coolant?
The normal operating temperature of the engine coolant should be somewhere between 235-250F.
Why does my engine feel so hot?
The primary reasons behind a car engine feeling hot are a defective water pump, damaged head gasket, a faulty thermostat, or, insufficient coolant levels.