Engines get hot when they run. This heat can build up and damage vital engine parts, so engines need a cooling system to keep them running. Cooling system failure is the most common mechanical failure in vehicles. This is unfortunate, because these failures are usually easy for St. Peter motorists to prevent.

The radiator is the best-known and most recognizable part of the cooling system. Hoses filled with coolant (also known as antifreeze) connect the radiator to the engine. The coolant draws heat from the engine, and then flows to the radiator. Air passing through cooling fins on the radiator cools the coolant. The coolant then cycles back into the engine to start the process over again.

The most critical component of the cooling system, however, is the coolant itself. A mixture of water and coolant/antifreeze helps keep it both from freezing and from boiling away. Either can result in serious engine damage.

Different engines require different types of coolant/antifreeze. The owner’s manual will list what kind a vehicle requires. Using the wrong type or mixing different types of may void the warranty on the cooling system and may damage it as well.

Insufficient coolant can lead to engine failure. Coolant levels need to be checked regularly and topped off as necessary. If coolant levels drop quickly or consistently, the cooling system should be inspected for leaks. Coolant/antifreeze contains additives that protect the radiator and other coolant components from rust, scale and corrosion. Over time, these additives are depleted, so it is necessary for St. Peter drivers to replace coolant at specified intervals. Changing coolant should be part of routine preventive maintenance for any vehicle.

This service is often ignored, though, since old coolant still cools the engine. Vehicle owners don’t realize there is a problem until the system fails. They are left with major repairs and possibly a damaged engine, which could have been prevented with a cooling system service at Autotronics of ST Peter in St. Peter.

If your minivan sends a warning message to check its coolant or if the temperature gauge is reading in the red or hot zone, then the cooling system needs a diagnostic examination. This service is vital and should not be put off since the potential for damage is high.

In an emergency situation, water or antifreeze can be added to your minivan so that it can be driven to a service center for proper car care. For this reason, owner’s manual contains instructions for how to top off insufficient coolant – allow 45 minutes for the engine to cool before attempting to add coolant or water. However, the fluid should be added to the coolant overflow bottle, not to the radiator itself. Removing the radiator pressure cap can result in severe burns.

Topping off in an emergency, however, does not fix the problem. The vehicle should immediately be taken to your St. Peter service center or Autotronics of ST Peter where they can inspect the cooling system, repair any leaks, and clean it if necessary. They can identify what caused the emergency situation in the first place and ensure it doesn’t happen again.

Regular maintenance of a vehicle’s cooling system is just good auto advice for St. Peter car owners. Cooling system service is relatively inexpensive and doesn’t take long at Autotronics of ST Peter. Lack of it, however, can put a vehicle in the scrap heap.

Talk to your Autotronics of ST Peter service advisor for more information.

The cooling system keeps MN car owners’s engines from overheating while they are driving around St. Peter, Saint Peter and Le Sueur. Its job is to move heat away from the engine. Let’s talk about the various components of the system and how they make this happen.

The radiator is the part most St. Peter motorists associate with the cooling system. Coolant flows through the radiator which has fine cooling fins that draw the heat out of the coolant and dissipate it into the air. To make sure there’s enough airflow over the radiator, a fan pulls air over the cooling fins even when the minivan is idling.

In some minivans, the fan is powered by the serpentine belt. On others, an electric motor runs the fan. Electric fans turn on and off as needed. You may have heard the fan kick on shortly after you turn your minivan off. The sensor has determined that the engine needs a little help cooling down to a safe temperature.

A hose connects the radiator to the water pump. The water pump pushes the water into the minivan engine block. Now the engine block and cylinder heads have passages for the coolant to pass through without getting into the oil or the combustion chamber. In the automotive community, these passages are referred to as the “water jacket”.

While the coolant is passing through the water jacket, it absorbs heat from the minivan engine on its way to the radiator for cooling. Between the engine and the radiator is a gatekeeper called the thermostat. The thermostat’s job is to regulate the temperature of the engine just like your home thermostat regulates the temperature in your St. Peter house. It gets your engine up to the correct operating temperature and then keeps it from overheating.

When you first start the engine, it’s very cold and needs to warm up. So the thermostat blocks the flow of coolant to the radiator. As the engine warms up, the thermostat starts to let coolant flow through the system.

The final component the team at Autotronics of ST Peter wants to point out is the overflow reservoir. This bottle is designed to hold some of the coolant. It’ll have a mark that indicates whether or not you have enough coolant. This is where you should add coolant if you just need to top it off.

Caution: never open the reservoir or the radiator cap when the car’s hot. The cooling system is pressurized and opening them while it’s hot can cause hot coolant and steam to escape resulting in serious burns.

Cooling system failure is the most common mechanical failure in vehicles around St. Peter, MN. At Autotronics of ST Peter, we can do a periodic inspection of the components for dangerous leaks, loose connections and weakening hoses.

Autotronics of ST Peter
111 Jefferson Avenue
St. Peter, MN 56082
507.934.9290

Your automobile manufacturer has also specified a cooling system service interval. With a cooling system service at Autotronics of ST Peter in St. Peter, the old coolant is replaced with correct clean fluid that contains the additives required to prevent corrosion. The additives are depleted over time and you need fresh fluid for adequate protection. Your radiator pressure cap should be replaced at this service as well.

St. Peter motorists rely on their car’s coolant system to keep their engine cool. Coolant (also called antifreeze) mixed with water flows through your minivan engine and absorbs heat. The mixture then flows out to the radiator where it’s cooled by air flowing over the radiator. From there the coolant/water mix circulates back through the engine to absorb more heat.

There’s a reason we mix coolant and water. Water alone actually does a good job transferring heat from the engine. The problem is that water boils at a temperature that’s easily reached inside your minivan’s engine, so it can turn to steam which does not conduct heat as well and is harder to contain.

Also, if it’s freezing outside in St. Peter, the water in your engine could freeze while your vehicle is sitting out in the MN cold.

So, if you remember your St. Peter high school chemistry, you’ll know that a mixture has both a higher boiling point and a lower freezing point than either component alone.

Coolant, or antifreeze, is specially formulated to keep your engine safe in a wide range of environmental and operating temperatures in and around St. Peter.

Whenever your minivan is running, the coolant in the cooling system is working to keep your engine from overheating. When it’s cold outside, the coolant acts as antifreeze to keep the fluid from freezing in your engine.

All that exploding fuel in your engine creates a lot of heat. Without coolant, the metal minivan engine parts would expand so much that the engine would seize up and stop running. The pricey parts could be broken or warp so badly they would have to be replaced. It could even be so bad that the whole minivan’s engine is ruined and has to be junked.

This is why it is critical that St. Peter drivers check coolant levels frequently and have their minivan cooling system inspected for leaks. Also your minivan auto manufacturer has a maintenance requirement for draining and replacing your coolant. These recommendations can vary widely, so check your owner’s manual or ask us at Autotronics of ST Peter in St. Peter.

The reason St. Peter auto owners need to change the coolant is that it has additives in it to protect the cooling system. As you can imagine, with all the heat, the cooling system’s a pretty harsh environment. The additives keep the fluid from becoming corrosive and damaging the radiator and other minivan cooling system components. Over time, the additives are depleted and the coolant just has to be replaced.

Many St. Peter auto owners ask Autotronics of ST Peter why there are different colors of antifreeze. It is very important that you use the correct type of antifreeze. The different types of antifreeze – or coolant – are different colors so you don’t mix them up.

The auto manufacturers use different materials to make the cooling system, and they require different types of antifreeze to protect them.

So check with us at Autotronics of ST Peter in St. Peter or your owner’s manual for the right kind because using the wrong coolant can void the warranty for your minivan cooling system.