How does a radiator work in a car and its importance?

How does a radiator work in a car and its importance?

The radiator moves the heat from the fluid inside to the air outside, in this manner cooling the fluid, which thus cools the engine. Car radiators are additionally frequently used to cool programmed transmission fluids, air conditioning system refrigerants, intake air, and occasionally to cool engine oil power steering fluid. 

Radiators are ordinarily mounted in a position where they get airflow from the car when being driven ahead through the front grill. Where car engines are mid-or rear-mounted, it is entirely expected to mount the radiator behind a front grill to accomplish adequate airflow, despite the fact that this requires long coolant pipes. The radiator can also draw air from the flow over the top of the vehicle or from the side-mounted grills. 

Car radiators are built of a couple of metal or plastic header tanks, connected by a centre with many restricted ways, giving a high surface region comparative with volume. This centre is generally made of stacked layers of metal sheet, squeezed to shape channels and welded or brazed together. 

For a few years in the past radiators were produced using metal or copper centres patched to metal headers. Current radiators have aluminium centres and frequently save money and weight by utilising plastic headers with gaskets. This development is more inclined to failure and less handily fixed than conventional materials.

The five most common problems occurring in a car radiator

Your car radiator is one of those parts of your car that you do not consider much until there is an issue with it. Be that as it may, when it needs to, it typically has no issue standing out enough to be noticed. The radiator, thermostat and water pump make up your car cooling system.

If there is an issue with it, the incredibly high temperatures of your running engine will make the car overheat and likely fail. Your engine runs hot, around 200 degrees Fahrenheit and without something cooling it off, that heat can unleash devastation on different parts of the engine. 

The radiator avoids the engine from overheating by cooling the fluid that streams around the engine block to scatters the engine heat. At the point when you see smoke coming from the radiator, it is a marker that the radiator has not had the option to do this work and therefore, your car is overheating as a result.

It is critical to understand what the most common car radiator issues are, the way to stay away from them and how to fix them to keep your car as solid as could really be expected:


The most common reason for radiator leak are flawed hoses, however, you can have leaks in the actual radiator which can be a more concerning issue. The coolant ceaselessly running from your radiator to your hot, running engine and back again makes a ton of pressing factor. That pressure development will in the end spell destruction for your radiator hoses. 

The hoses will either get damaged or come free, permitting coolant to escape from the system, which will eventually prompt overheating. In the event that you see green liquid under your vehicle or close to it and you smell something sweet, it is a sign your radiator is leaking. On the off chance that your radiator is too corroded, this can cause a leak in the body of your radiator regardless of whether the hoses are intact.

It is recommended to get your car mechanic to check your hoses when you complete your regular service.

Rusty or corroded radiator

In the event that the outside of your car rusts, you are certain to take note. Yet, in light of the fact that you do not see it, does not mean it is not occurring in your car. At the point when you combine air, metal and liquid, oxidation and rust will undoubtedly happen. Each one of those ingredients is available in your radiator, which means rust is a genuine danger. On the off chance that your radiator gets excessively rusted, it can end up with holes and leak or in any case completely fail and break down. 

On the off chance that your vehicle is running excessively hot, check your radiator for rust. You can also tell if your radiator is rusty or corroded if the shade of your coolant gets brownish in colour. In the event that you work your car in cold climate environments, you ought to be particularly cautious of rust.

The best solution for this is to ask your car garage to complete a coolant flush with your yearly full service. The reason for this is the product the trained technicians use instantly neutralises acid that causes corrosion.

The build-up of gunk and other obstructions

Another normal radiator issue is the build-up of deposits, which is frequently more generally referred to as gunk. You know gunk when you see it, it is a thick, unattractive, lumpy substance that appears to exist exclusively to clog up things. Deposits such as dirt, debris and another obstructive build-up in your radiator make it harder for the radiator to stream the legitimate measure of coolant to the engine. On the off chance that your vehicle is overheating or getting hot excessively fast and you do not see a rust issue, breaks or isolating of the hoses, check inside the radiator for gunk development.

The recommended solution for this problem is also to complete a coolant flush. This is because the coolant flush does not only get rid of rust but also all the build-up of gunk blocking the passages of the radiator. Make sure to tell your car repair and maintenance garage not to just drain out the current coolant and top it back up as this will not resolve the issue.

Bad water pump or thermostat

Keep in mind, your radiator is only one piece of an interconnected coolant system, and all of the pieces of that system require to be working appropriately to keep your engine cool. In the event that the thermostat does not work and fails, the system will not realise when to deliver fluid into the radiator, and if the water pump falls flat, the system will not have the correct amount of pressure to circulate the coolant. On the off chance that both of these things occur, the radiator will not function as planned.

The only solution to this issue is to get your car repair specialist to complete either a thermostat replacement or a water pump replacement. In the worst-case scenario, you may need to get both parts replaced.

Overheating when idle

An overheated radiator or engine is an ordinary after effect of any issue with the cooling system. Nonetheless, on the off chance that you wind up in a circumstance where the temperature check spikes when you are sitting in rush hour grid lock or standing by for some other explanation, a typical offender is a failed radiator fan. Another piece of your coolant system, particularly in the modern cars nowadays, is an electric fan that brings air into the radiator to ensure it stays cool while you are sitting or on the off chance that you are driving at low speed. At the point when this fan breaks, inactive overheating is a common issue.

Unfortunately, the only solution to this problem is to complete a car radiator fan replacement.


Book your service now Book your car MOT, service, repair or diagnostics.