Los Altos Auto Repair

Hot summer sun, got to love it but sometimes your car does not, Cayenne here and today we want it COOL.

The cooling system keeps CA drivers's engines from overheating while they are driving around Los Altos, Mt. View and Sunnyvale. 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 Los Altos car owners 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 sedan is idling.

In some sedans, 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 sedan 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 sedan 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 sedan 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 Los Altos 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 Allied Auto Works 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 Los Altos, CA. At Allied Auto Works, we can do a periodic inspection of the components for harmful leaks, loose connections and weakening hoses.

Allied Auto Works
2073 Grant Road
Los Altos, CA 94024
650.968.7227

Your vehicle manufacturer has also specified a cooling system service interval. With a cooling system service at Allied Auto Works in Los Altos, 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.

Now I know I just heard the ice cream man,  I need to go run him down and keep it COOL!

Cayenne

Los Altos drivers' cars have to operate in a wide range of CA temperatures which requires our engine coolant to be able to perform 'no matter what'. Think for a moment about the environment where the coolant does its thing. Very hot, high pressure, corrosive...

And all the while, it has to protect the components of the cooling system from corrosion. These components are made from steel and aluminum, plastics and rubber. The coolant has to be formulated to protect against corrosion for all of these different materials. That’s why manufacturers recommend different types of anti-freeze for our Los Altos, CA vehicles.

There are several different 'families' of anti-freeze available to us here in Los Altos, CA. Your owners’ manual will tell you what kind you should use. Of course, the automotive professionals at  Allied Auto Works will know the right kind for your car.

It’s critical to stay on top of this because coolant system failure is the most common mechanical problem people have here in Los Altos, CA. Regular service at Allied Auto Works needs to be done to avoid failures and also to keep your warranty in place.

While the specifics of the service required may vary from vehicle to vehicle, your personal Allied Auto Works tech will know what to do. You’ll be advised to replace the coolant at specified intervals.

Some manufacturers recommend periodic coolant system flushes. A flush adds a cleaning step to the fluid replacement process. Again, check to see what your Los Altos tech recommends.

Someday, you may have to deal with an overheating problem, so you need to know what to do if your coolant temperature warning light comes on or your temperature gauge is in the hot zone.

Now, overheating can be very pricey. Los Altos drivers can literally melt down their engine and have to replace the whole thing. So don't ignore warning signs.

First turn off the air conditioner. This will lower engine temperature right away. Next, crank up your heater to maximum heat and run the fan at high speed. You might need to roll down the windows, but this will take a lot of heat off the engine.

Pull over as soon as you can safely do so, especially if you are stuck in slow-moving traffic, and shut the car off. It may take as much as 45 minutes for the engine to cool to the point that it’s safe to operate the car again.

If you need to add water or antifreeze, be sure to wait until the car cools down. Opening the radiator cap or even the overflow bottle when the coolant is hot and under pressure may result in serious burns.

After the engine has cooled for 45 minutes or so, look to see if the coolant is low in the overflow tank. If so, you can cover the overflow tank cap with a large cloth and open the lid. Then start the engine and pour in some water or antifreeze. Pouring it in when the car is running will circulate the new, cool fluid with the warmer fluid in the engine and avoid engine damage.

Of course, overheating is a serious problem and you need to get it fixed right away. Allied Auto Works can make sure the coolant is right before you drive home.

Those spring and winter inspections really come in handy when they head off a cooling system problem. And don’t forget that severe service driving conditions, like towing or hot, dusty driving around Los Altos, CA, mean that you’ll need to service your coolant more frequently.

At AutoNetTV, we suggest that you have Allied Auto Works inspect your coolant system to find small problems before they become big, and to change belts and hoses before they fail. After all, we don’t want you to lose your cool out there in Los Altos, CA.

Los Altos drivers rely on their car's coolant system to keep their engine cool. Coolant (also called antifreeze) mixed with water flows through your sedan 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 sedan'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 Los Altos, the water in your engine could freeze while your vehicle is sitting out in the cold.

So, if you remember your Los Altos 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 Los Altos.

Whenever the sedan 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 sedan engine parts would expand so much that the engine would seize up and stop running. Expensive parts could be broken or warp so badly they would have to be replaced. It could even be so bad that the whole sedan's engine is ruined and has to be junked.

This is why it is critical that Los Altos drivers check coolant levels frequently and have their sedan cooling system inspected for leaks. Also your sedan 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 Allied Auto Works in Los Altos.

The reason you 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 sedan cooling system components. Over time, the additives are depleted and the coolant just has to be replaced.

Many Los Altos auto owners ask Allied Auto Works 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.

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 Allied Auto Works or your owner’s manual for the right kind because using the wrong coolant can void the warranty for your sedan cooling system.

The coolant system is a vital part of your vehicle. It is also the second most common cause for vehicle failures. Even though coolant system failure is fairly common in Los Altos, it is easy to prevent.

Allied Auto Works
2073 Grant Road
Los Altos, CA 94024
650.968.7227

The most recognizable part of the coolant system to Los Altos drivers is the radiator. It is connected to the engine with hoses and is filled with coolant. The coolant draws heat off the engine and then passes into the radiator. Air passes through cooling fins to reduce the temperature of the coolant and then it's back to the engine again.

There are several ways for the cooling system failure. Most common is with the coolant itself. Coolant is comprised of water and antifreeze. The proper ratio keeps the coolant from either boiling away or freezing. Understandably, either can lead to massive engine damage.

Another essential coolant issue that is often overlooked by Los Altos drivers is the age of the coolant itself. Antifreeze has additives that protect the coolant system from corrosion. As these additives are depleted over time, they can't protect the radiator and other parts from rust, scaling and corrosion. That old container of coolant gathering dust in your garage may still keep your engine cool, but it won't protect it from corrosion.

If get a warning message to check the coolant or if the sedan temperature gauge is in the hot zone, your cooling system needs to be checked. It's OK to add water or antifreeze yourself. But you need to be cautious. Remember four things:

• First, you never want to open the radiator pressure cap. You could be severely burned.
• Second, get to Allied Auto Works in Los Altos immediately if your coolant is low. If that is not possible, follow the directions in your sedan owners manual - it will direct you to only make additions to the coolant overflow bottle.
• Third, remember that you need a proper mixture of water and antifreeze. If you make an emergency addition to your cooling system, follow-up with your Allied Auto Works service center where we can make necessary adjustments.
• Fourth, not all cars use the same type of antifreeze. You need to check your sedan owners manual to make sure you use the right kind. Mixing antifreeze types or using the wrong kind of antifreeze may void the manufacturers warranty on your cooling system. Again, another reason to depend on your Allied Auto Works service center in Los Altos to do things right.

Remember, your Los Altos service center has the equipment to change your coolant quickly and inexpensively.