Updated at: 10-08-2023 - By: micdot

The cooling system is one of the most important parts of any automobile. Keeping the engine’s operational temperature within acceptable limits is the primary function of a vehicle’s cooling system. In addition, the pressurized system may not be kept in place. Your vehicle’s engine can overheat if there is a leak in the vehicle while it is running. In addition, your vehicle may be in need of repairs in the near future. Consequently, if you are concerned about your vehicle’s coolant loss while driving, you’ve come to the perfect place.

This article explains why your vehicle is losing coolant and what you need to do about it. Let’s get this party started now.

Why Does My Car Leak Coolant Only When I Drive?

Almost every car has a cooling system that consists of a sealed compartment with hoses and cylinders running through it all. The cooling system includes the engine and radiator. There is a chance of a leak in any of these places. When driving, coolant may drop from these leaks. A blown head gasket, failing water pump, or a problem with the coolant tank extension are just some of the possible sources of leakage.

1. There Are External Leaks.

The fluid in the radiator will be pushed into the engine, where it will be heated. It will then return to the radiator, where it will be cooled, before exiting the engine. A leak in these areas is considered an exterior leak, which might cause dripping if the vehicle is running.

Analyzing an exterior coolant spill from a car is a simple task. Devices aren’t required to perform any kind of testing. Keep an eye out for any signs of failure.

2. There Are Radiator Leaks.

If your car is running, the radiator hose is responsible for the external coolant leaks. Over time, the elastic hoses might deteriorate and even rupture.

The hoses and other coolant systems might also become disconnected. Fluid coolant can leak if there are open clasps.

3. There Are Radiator Cap Leaks.

The radiator cap has the unenviable task of maintaining the precise pressure required to effectively transfer the coolant-water combination. The cooling fluid cannot enter the system if there is a loss of pressure. Your car’s radiator is a pressurized system, and you should realize that. As a result, heated engine fluid can enter the radiator’s cylinder layout. Taking a trip can also help you cool down and keep the engine cool. Pressure in the radiator will drop if the radiator cap leaks.

4. There Is A Blown Head Gasket.

The health of your engine is directly related to the state of the head gasket. You may not be aware of a blown head gasket for some time. Even if you drive a few kilometers, you won’t notice anything amiss. There are a wide range of temperatures that the head gasket can handle. This is located between the cylinder head and the cylinder block of the engine. It is well-known that this will blow if it begins to leak.

It’s impossible to keep the coolant and the motor oil separate if that happens. This can lead to serious engine damage if left unchecked.

5. There Is A Failed Water Pump.

The water pump is critical to the cooling system’s ability to maintain a constant flow of coolant. This is close to the driving belts and has a belt in the engine’s lower portion. A radiator-heated basement is also included.

Long periods of hose leakage are possible. Rust can also build up on it. It can also be harmed by something outside of itself.

6. There Are Issues With The Coolant Extension Tank.

An additional tank can be added to the vehicles. Additionally, this can be pumped into the radiator. The majority of the extension tanks are made of plastic, and they are positioned very next to the motor.

A radiator and an elastic hose are commonly found on these units. Using this pipe, the coolant will be brought to the radiator, and the other way around. When the engine is warming up or cooling down, this is what happens.

What To Do When You Have This Issue?

A radiator hose inspection is highly recommended. Inspect the hoses for cracks, bulges, holes, or other signs of damage. Replace any hoses that have been damaged as soon as possible. Radiator damage can cause an exterior leak while you are driving. If your radiator is leaking, get it looked out. You’ll also need to drive to a service center to have the radiator cap pressure tested. You can also look in the owner’s manual or under the radiator cap to see if anything is amiss. Damage to the water hose may also be the result of normal wear and tear. You’ll have to get new ones if you want to keep your pipes from leaking. If you follow the correct amount of coolant for the extension tank, you can also prevent the coolant from leaking while driving your car. Changing the coolant in your radiator necessitates a standard maintenance plan. As a result, the current coolant will begin to degrade.

A buildup of aluminum in your radiator could potentially cause it to turn acidic. Visit a mechanic to get an accurate diagnosis of the issue.

Can Coolant Leak While Driving?

Yes. A major cause of coolant leaks when driving is the engine’s high temperature and pressure, which can lead to leaks. Even if your engine is operating, you may have coolant leaks from a cracked coolant hose, an unrepaired leaky radiator, a broken radiator cap, or a ruptured head gasket. If your engine is operating, coolant can leak through a fractured hose or a faulty gasket. Coolant can also be pumped around the engine at high pressure.


To summarize, motorists have begun discovering coolant leaks while on the road. Because coolant stops your engine from overheating, this annoys automobile owners.

This article is here to help you out. It’s best to consult this guide if you’re experiencing coolant leakage. It is possible to fix leaks.