Car Radiator Hose: Function, Maintenance, and Replacement

The car radiator hose is a component that uses rubber as the primary material. But, after some time, this rubber can be fragile or cracked. As a result, the radiator hose leaked and even ripped. As you know, the radiator is a crucial component of the whole system in the vehicle's engine, including your car.

The car radiator will reduce engine heat throughout the combustion process.

If the radiator has a problem, the engine temperature will be too high and cause damage to the components. This condition is known as engine overheat, which will make the car stop, and your trip will be interrupted.

Just like other components in the engine room, the radiator also consists of several parts. Some of them are radiator coolant and radiator hose. Well, this time, we will discuss the radiator hose.

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Broken radiator hose

So, how do you take care of the radiator hose so that the condition is always excellent and the service life is longer? What should you consider when replacing a radiator hose? Please read further.

Car Radiator Hose Function


The radiator hose serves to drain cooling fluid (radiator coolant). The fluid radiator will flow into the engine while working to reduce excess engine heat through the combustion process.

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Car radiator hose

Coolant flows from the radiator to the lower-hose then into the engine when the thermostat is open.

After leaving the engine, the hot liquid will return to the radiator through the upper-hose. However, when the thermostat closes, the radiator fluid from the hot engine will accumulate in the radiator until the thermostat reopens.

Also, the radiator hose can reduce vibrations from a working machine.

So, the hose will prevent the vibration from going to the radiator. To reduce engine vibration, then most car radiators placed at a certain distance from the engine block. Thus, the engine vibration will not directly hit the radiator walls.

How to Take Care of a Car Radiator Hose


With a rubber base material, the radiator hose also has a lifetime. Generally, after your car is more than five years old, there will be a problem with the radiator hose because the rubber starts to become brittle.

There is only one problem with the radiator hose: leakage. Therefore, you should check the condition of the radiator hose on cars over five years old. Fragile rubber is a significant cause of hose leakage in hot engine room conditions.

The most straightforward tips when caring for a car radiator hose is always to keep it clean.

Don't leave dirt on the radiator hose accumulated.

Besides, make sure that no rodents can bite the hose and cause leakage.

Also, you need to check the condition of the radiator hose periodically. If the conditions are dirty, just wash with water and wipe clean. Do not use detergent or other cleaning fluids because chemical liquids might damage the elasticity of the rubber on the radiator hose.

Note the fastening clamps on the radiator hose, is it still in good condition or not?

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Radiator hose clamps

The clamps must make the hose stick tightly to the radiator and also the engine part of the car.

However, the metal base of the binder clamps makes it easy to corrode or rust and cause its strength to decrease. So, if the radiator hose clamps look rusty, then you should immediately replace them with new, high-quality clamps.

Car Radiator Hose Replacement


When the radiator hose is fragile, cracked, leaking, or even torn, then you have to change it with a new one. There are different prices for new radiator hoses depending on the brand and type of car. While the cost of radiator hose clamps also varies depending on the material of the clamps

However, some car owners modify it by buying an aftermarket radiator hose. Usually, they do it because car owners want color variations in the engine room. Most aftermarket radiator hoses have a variety of colors that you can choose according to taste. Besides, this replacement process can occur due to changes in engine specifications from the manufacturer's standard specifications, thus requiring better radiator water intake through radiator hoses with better durability.

Some automotive aftermarket manufacturers in the US also have radiator hose variants. However, before deciding to buy it, you must be careful to suit your needs. Also, consider whether you use the car as a daily vehicle, on the race track, or as a modification contest participant.

If you use a car for daily activities, then you should choose an aftermarket radiator hose that is thick and elastic enough. The choice of hose thickness depends on engine specifications.

The right thickness will make the radiator hose resistant to engine heat pressure and easy to bend when it has to put at a narrow machine angle.

Also, make sure the length and diameter of the hose are under the specifications of the car's engine to eliminate the risk of overheating.