Autobahn West

Providing superb car service and repairs to BMW, Mini Cooper, Porsche, Volvo and Mercedes owners since 1976

Autobahn West - Providing superb car service and repairs to BMW, Mini Cooper, Porsche, Volvo and Mercedes owners since 1976

Cooling System Components


Today we want to talk about a vital system in our cars – the cooling system. It’s one of those things that Mission Viejo car owners don’t give much thought to until it fails and then they’re stranded by the side of a road in Mission Viejo.

Cooling systems fail more often than any other mechanical system – usually because of neglect. Don’t you hate it when something breaks, and you could have done something to prevent it?

The good news is that if Mission Viejo car owners take care of their cooling systems they can keep working for the life of their car.

Here at AutoNetTV and Autobahn West in Mission Viejo, we emphasize key preventive maintenance services like replacing your coolant according to the factory schedule. But the various parts that make up the cooling system need attention too. The major components of the cooling system are the water pump, freeze plugs, the thermostat, the radiator, cooling fans, the heater core, the pressure cap, the overflow tank and the hoses.

It sounds complicated, but we Mission Viejo motorists don’t have to be experts – we can leave that to our understanding service advisor at Autobahn West. But, having an overview will help us remember how to take care of your car’s cooling system.

Most Mission Viejo folks would be surprised to know that burning fuel in your engine produces up to 4,500 degrees of heat. And all that heat has to be dealt with. If the heat can’t be drawn off the engine, the pistons will literally weld themselves to the inside of the cylinders – then you just have to throw the engine away and get a new one. That would cost thousands of dollars.

Now the water pump is what forces the coolant through passages in the pickup engine to absorb heat. The pump is driven by a belt that needs replacement from time to time. And the water pump will eventually wear out and need to be replaced. Spending some cash on replacing the belts and water pump is much less than the cost of repairing the extremely pricey damage that can be done when an engine seizes.

There’s another little but essential part of the coolant system that protects the engine. It’s called a freeze plug. If you remember from high school chemistry, water expands when it freezes. In very cold areas, the coolant can actually freeze when the pickup is left sitting.

It is hard to believe, but the expanding frozen coolant is effective enough to actually crack the engine block. The freeze plugs fit into the engine block. They fit tight enough to withstand the pressure of a running engine, but can expand or pop out if the coolant freezes. These little things save a lot of engine blocks.

That brings up a good point. An engine has to work in all kinds of CA temperatures – extremely hot as well as very cold. How does the pickup cooling system adapt to external temperatures as well as varying operating conditions?

Well, it’s much like the way you keep your Mission Viejo house at a comfortable temperature all year round – with a thermostat. The thermostat in your pickup controls how much coolant flows through your engine. When the engine is cold, it restricts coolant flow until the engine comes up to an efficient operating temperature. Then it starts opening up to move more coolant to keep the temperature within a specified range.

The thermostat needs to be replaced from time to time as well. It’s easy for your Autobahn West service specialist to diagnose a failed thermostat and is fairly inexpensive to replace. We can do this for you at Autobahn West in Mission Viejo, just give us a call: 949.770.2312. Now we’ve been talking about all this heat we’ve got to get rid of, but haven’t really talked about where it goes. That’s where the radiator comes in. The hot coolant passes through the radiator. Air flows past the cooling fins and cools the coolant.

The radiator has two tanks that hold coolant: sometimes one at the top and bottom or one on either side. If you have an automatic transmission in your pickup, one of the tanks will also contain a second tank that cools the transmission fluid. Large SUV’s and trucks often have a separate transmission cooler. So when Mission Viejo car owners drive around Mission Viejo, the air is forced past the radiator. But driving doesn’t produce enough air flow. So the radiator has cooling fans that force fresh air over the radiator. These fans may be powered by a belt or by electric motors.

Mission Viejo auto owners also have something called a heater core. The heater core is like a mini radiator. A small fan blows air over the heater core and into the passenger compartment of your pickup. That’s how Mission Viejo motorists warm their cars when it’s cold out in CA.

Next is the radiator cap. With most newer cars around Mission Viejo, you never remove the radiator cap, except to replace it. You add coolant through the overflow tank. The radiator cap is also called a pressure cap, because its essential job is to maintain pressure in the cooling system.

High pressure raises the boiling point of the coolant, so it cools more effectively even in very demanding Irvine conditions. That is why Mission Viejo auto owners need to replace the cap from time to time. The team at Autobahn West recommends changing it out every time you replace your coolant.

Coming back to the overflow tank, it is key because when the coolant gets hot it expands and the overflow holds the extra volume. The tank helps maintain the proper level of coolant and keeps air out of the system. Mission Viejo drivers should never open the radiator cap or over flow tank when the engine is hot. This could lead to serious burns.

What else do we Mission Viejo car owners need to do to keep our cooling systems working well? Well, there are the hoses that hook all of these pieces together. They’re obviously very tough to deal with the pressure and high temperatures. But they do get worn. Sometimes they get spongy from the heat. Sometimes they lose their connection to the radiator, water pump, etc. It’s a great idea to have your Mission Viejo service center or understanding Autobahn West technician inspect your hoses at least once a year and replace them, if needed, before they break.

The team at Autobahn West can check your cooling system and make any necessary adjustments or repairs. Give us a call at 949.770.2312.

Autobahn West
25800 Jeronimo Rd. #200
Mission Viejo, CA 92691
949.770.2312

Fuel Saving Tip: Mission Viejo Tune Up

Have you ever gone to Irvine to listen to an orchestra? The musicians take the stage early and tune their instruments. Each individual instrument must be in tune, but the critical thing is for the entire orchestra to be in tune with each other. That’s why they tune up together.

Fuel Economy Now this is no surprise; I’m going to relate the orchestra to your car. Your engine has many component systems that each need to be working properly. And the components need to be working in sync, all timed up together in order for the engine to work efficiently.

We call this, (ta-da) a tune-up. When an orchestra’s out of tune you get a bad concert. When your vehicle’s out of tune you get bad performance and bad fuel economy.

So check your owner’s manual for recommended tune-up intervals. Or ask your Mission Viejo service advisor at Autobahn West what he thinks.

…Just be careful not to say you want to make beautiful music together – that kinda makes us uncomfortable.

Fuel Saving Tip: Alignment For Your Mission Viejo pickup

Imagine you’ve left Mission Viejo and you’re up in the arctic on a dog sled.

Your dog team is pulling straight and true. You can cover a lot of ground quickly. Now imagine what would happen if one or two of the dogs wanted to go their own way and were pulling off to the side.

That would slow you down. You would have to work harder to keep the sled going where you want it. The dogs are all working as hard as before, but you’re covering less ground for the same effort.

You’re wasting kibble.

Alignment The same is true of your pickup when the wheels are out of alignment. That wheel that’s pulling to the side is dragging down the rest of the car; so you push a little harder on the gas pedal to keep up your speed. You’re wasting gas.

So have your wheel alignment checked at least once a year. It is key to get it checked right away if you feel the car pulling to one side.

Sometimes we Mission Viejo drivers bump a curb or hit a pothole and knock our wheels out of alignment. An accident can take the wheels out of alignment as well.

Mission Viejo auto owners need to make sure they’re tracking straight. You’ll get better fuel efficiency and your tires’ll last longer. Now, mush!

Autobahn West
25800 Jeronimo Rd. #200
Mission Viejo, CA 92691
949.770.2312

Fuel Saving Tip: Car Weight And Your CA Driving

Weight is the enemy of fuel economy. Everyone from here to Foothill Ranch knows this makes sense.

Some of us in the Foothill Ranch area carry a bunch of unnecessary weight, and I’m not talkin’ what you see in the mirror.

pickup Weight Guys; sports equipment and tools. Ladies; well, just take a look around the passenger compartment and trunk. I think my car has about forty-five pounds of French fries on the floor.

All that extra weight wastes gas as you drive between here and Foothill Ranch, and everywhere else.

Lose the junk and save some money.

…And you really only need one of those spare tires.