Positive Crankcase Ventilation – PCV Valve Service at Brothers Tire
Posted September 23, 2018 07:16 AM
Hello Kannapolis! Did you know that the first federally-mandated emissions control device was introduced in the 1960's? The Positive Crankcase Ventilation valve, or PCV valve, has been installed in North Carolina vehicles since 1964 and represents the first legislation by the United States government to regulate harmful emissions as well as to improve performance in the country's vehicles.
The PCV valve, as you can probably guess, is located on the crankcase. The crankcase is the lowest part of a vehicle's engine. It houses the crankshaft and the engine oil. The crankshaft connects to the pistons that power the engine.
Pistons are pushed down when fuel is burned in an engine. This causes the crankshaft to rotate, which sends power to the transmission. It ultimately turns the axles and causes the vehicle to move. Some of the gases released by the burning fuel squeeze around the pistons and down into the crankcase.
If the escaped gases mix with the engine oil in the crankcase, oil sludge develops. This sludge has the consistency of petroleum jelly and can cause damage by clogging up passageways in the engine. Further, escaped gases can build up pressure inside the crankcase that can blow out seals and gaskets.
Before 1964, a hose was attached to the crankcase that vented escaped gases out into the air. These gases contained about 70% unburned fuel as well as harmful emissions. The PCV valve was designed to curb these harmful emissions as well as recapture unburned fuel.
The PCV valve is a small, one-way valve that allows escaped gases to exit the crankcase. The gases are then routed into the intake system so they can be re-burned in the engine. Fresh air enters the crankcase through a breather tube to facilitate this circulation and keep the air in the crankcase clean.
The PCV valve, like most working parts on a vehicle, will wear out over time. Usually it simply gets gummed up. Preventive maintenance, including routine oil changes at Brothers Tire in Kannapolis, will extend the life of the valve, but eventually it will have to be replaced. A sticking PCV valve won't allow gases to circulate properly, which can increase pressure in the crankcase. Over time, that pressure will lead to oil leaks.
Your vehicle manufacturer recommends that a PCV valve be replaced every 20,000 to 50,000 miles (32,000 to 80,000 kilometers), depending on the vehicle and Kannapolis driving conditions. It's an inexpensive repair but may not be included in the maintenance schedule in your owner's manual. So if you're looking for auto advice about the PCV valve, you may have to ask our pros at Brothers Tire.
Taking care of our PCV valve protects the environment in North Carolina and improves vehicle performance. It's just part of good vehicle care for Kannapolis drivers and a way all of us can do our part to improve the world we live in.
Cruisin' on Down Main Street
Posted September 16, 2018 08:27 AM
When automakers first came out with cruise control, it was a real luxury item. The older cruise controls used a mechanical vacuum system but it worked. Well, some of the time.
Now days, cruise control is all electronic, thanks to computers. It's reliable and a real convenience on long trips. Cruise control is offered on most vehicles and standard on a lot of them. Because it's electronic, when it breaks, it's usually some electronic component. Your vehicle's cruise can be the victim of a blown fuse. Or your vehicle's speed sensor, which—not surprisingly—measures your vehicle's speed, can also stop working. And that will cause your cruise to stop cruising.
Vehicles with cruise control also have a built-in feature that, when the brakes are applied, turns off the cruise. With electronic cruise control, that happens thanks to the brake pedal switch, and if a problem develops in that switch, the cruise might not work.
The newest cruise control is called "adaptive." What that means is that it will maintain your vehicle's speed as well as the distance between you and the vehicle ahead of you. That means if a car ahead of you slows down, your vehicle will slow down to the same speed and even stop if the car ahead stops. Pretty cool, right? As you can imagine, adaptive cruise control is more sophisticated and has many more components than standard cruise. The systems vary from manufacturer to manufacturer, but they use on-board radar units and cameras to calculate what your vehicle should do to maintain a safe distance and speed.
Finally, there are still some of the older style cruise controls out on the roads. They'll stop working when the vacuum actuator develops a problem, a vacuum hose starts leaking or breaks or the cable between the actuator and the throttle kinks, breaks, seizes up or becomes detached.
If your cruise control isn't working, your service repair facility will be able to determine what kind your vehicle has and what it will take to fix it. Good news for the cruise blues.
Wishy-Washy in Kannapolis
Posted September 09, 2018 02:50 AM
Perhaps you've found yourself driving when something all of a sudden splashes on your windshield, obstructing your view. You know that sinking feeling when you try to turn on the windshield washers and no fluid comes out. Now you're blinded even more. What can you do?
The best thing is to make sure your windshield washer fluid is always topped off and ready for these situations. You probably figure you'll grab a bottle of that blue stuff you see in the store. But is that really the right choice?
One thing you know ISN'T the right choice is plain water. It can freeze when temperatures drop. Plus, when it's close to the freezing mark outside, spraying water on your windshield can freeze, turning it literally into frosted glass and blinding you suddenly. Water freezing in your vehicle's washer lines can also damage them.
There are different types of windshield washer fluid made for different climates. Many have alcohol to prevent them from freezing; their label will usually tell you at what temperature they'll start to freeze.
Some washer fluids will have detergents in them so they can cut through contaminants and dirt. Still other washer fluids have a chemical in them to prevent streaking.
Also keep in mind some washer fluids are made to be put in your fluid reservoir as is; others are made to be diluted.
No matter what washer fluid you pick, make sure you have plenty of it in your vehicle. Our pros at Brothers Tire can top off your levels with the right kind of fluid. That's also a good reminder to have your windshield washer system working properly. Your technician can check not only the washers but the wiper blades and motor to make sure all are in top condition. The worst time you can discover it is usually when you need it most.
Tacky or Techie? The Tachometer.
Posted September 02, 2018 10:04 AM
There's a gauge that many vehicles have that says RPM on it. And there are a lot of people who either don't pay any attention to it or don't even know what it is. Here's why it's a good gauge to know about.
It's called a tachometer, and that "RPM" label means it is measuring how many revolutions per minute (RPM) the engine is turning. Automotive experts know that a vehicle's engine can be damaged if it turns too fast (revving too high) or too slowly ("lugging" the engine).
A tachometer (sometimes called a tach) is almost a "must-have" gauge for vehicles with a manual transmission; the driver has to manually change gears; the tach helps the driver know when revolutions are in the optimal range.
Some say you don't need a tachometer if you drive a vehicle with an automatic transmission. It's true that most drivers of automatics don't even look at it. But there are times when paying attention to the tach can help you prevent an expensive repair.
Here's a good example. Manufacturers now build many of their automatic transmission vehicles with shift paddles. They let you shift gears without a clutch. That's manual shifting, and drivers need to know they're not revving the engine too high. That's where the tachometer comes in, since it shows you visually when you are in the red zone (RPM too high).
Here's another way the tach can help you: fuel economy. Generally speaking, the lower the RPM, the better the fuel economy. It's not good to go too low, of course, and the tachometer will help you find that spot of maximum efficiency.
You can also spot problems by paying attention to the tach. When your vehicle stays in first gear longer than usual (higher reading on the tach), then the RPM dip lower than usual after shifting, it may be that your vehicle's transmission is skipping a gear. Plus, if your vehicle's RPM go up but your speed doesn't, it could mean your transmission is slipping. Either situation should be checked by a trained technician.
If your commute takes you down some long grades, you might like to put your vehicle in a lower gear to help slow down the car (and not burn up the brakes). Having a tachometer keeps tabs on when your engine is revving too high.
So, consider the tachometer a "bonus" gauge. It's one more helpful assistant that can help you spot and prevent problems in your vehicle.