City Chevrolet

The energy from exploding fuel is what powers your engine. But some of the vapors from the explosions escape into the lower part of the engine, called the crankcase. The crankcase is where your engine oil hangs out. These gases are about 70% unburned fuel. If the gases were allowed to stay in the crankcase, they would quickly contaminate the oil and turn it to sludge. Sludge is one of the biggest enemies of your engine, clogging it up, eventually leading to expensive failures. Also, the pressure build up would cause seals and gaskets to blow out. Therefore, these gases need to be vented out.

Gasoline engines used to simply have a hose that let the poisonous fumes vent out into the air. In 1963, the federal government required gas engines to have a special one-way valve installed to help reduce dangerous emissions. Diesel engines are not required to have these valves.

The positive crankcase ventilation, or PCV, valve routes crankcase gases through a hose and back into the air intake system where they are re-burned in the engine. Fresh, clean air is brought into the crankcase through a breather tube. It’s really a pretty simple system, but does an important job. The re-circulating air removes moisture and combustion waste from the crankcase, preventing sludge. This extends not only the life of your oil, but the engine as well. The PCV relieves pressure in the crankcase, preventing oil leaks.

Eventually, the PCV valve can get gummed up. Then it can not move enough air through the engine to keep it working efficiently. If the PCV valve is sticking enough, you could have oil leaks, excess oil consumption and a fouled intake system. If you experience hesitation or surging or an oil leak, it may be a sign of PCV value problems. Your owners’ manual may give a recommendation for when the PCV valve should be replaced – usually between 20,000 mi/32,000 km and 50,000 mi/80,000 km. Unfortunately, some manufacturers don’t list a recommendation in the manual, so it can be easy to overlook.

Many PCV system problems can be diagnosed with a visual inspection. Fortunately, PCV valve replacement is both quick and inexpensive. Proper oil changes will greatly extend the life of the PCV valve. Skipping a few recommended oil changes can allow varnish and gum to build up in the valve, reducing its efficiency. So now when your Charlotte service technician tells you its time to replace your PCV valve, you will know what he’s talking about. If you have had your car for a while and this is the first you’ve ever heard of a PCV value, ask your tech to check yours out or call City Chevrolet at (866) 409-3468.

Like everything automotive, there have been great strides in headlight technology in recent years. We can all drive more safely at night because of it. Good headlights improve visibility down the road, enabling you to see farther. They also improve your peripheral vision, helping you to see the sides more clearly. The more you can see, the quicker you can react to road conditions. This is important because nearly half of traffic fatalities take place at night. And as the country’s population ages, everything that helps older eyes is welcome.

Most new cars come with halogen headlamps. A decade ago, halogens were exotic and expensive. Now that they are standard equipment, the price has come way down. Many luxury cars are equipped with high intensity discharge, or HID, headlamps. You have probably seen them on the road, they’re very bright and have a bluish tint.

From behind the wheel, there is no doubt that HID headlamps are the best thing going. However, many people complain about HID lights in on coming traffic or when they approach from behind. In fact, when the National Highway Traffic Safety Administration called for public comment, they received a record number of complaints about HIDs. This has lead to several studies – your tax dollars at work. Some expect future regulation of HID lamps.

All halogen headlamps dim over time. Experts recommend that they be changed out once a year. AutoNetTV suggests you replace your headlamps in the fall at the end of Daylight Savings Time. It’s easy to remember – when you change your clock, change your headlamps. Remember to replace all headlamps at the same time – then all your lights will be equally bright. You will appreciate it during those long winter nights.

If you have an older car with old style headlamps – they make halogen replacement lamps for most cars. You’ll be amazed at the difference this upgrade will make.

In addition to regular halogen lamps, you can upgrade to premium lamps that filter some of the yellow light, making a bright white light that’s more like natural sunlight. This light’s easier on the eyes and should improve reaction time.

Now, you may be able to step up to HID headlamps, depending on the kind of car you drive. These lamps should last the life of your car, but cost several hundred dollars a pair. If you want other drivers to think you’re running HID lamps, you can even buy regular halogens that have a bluish tint. Does she or doesn’t she? Only her NC automotive service technician knows for sure.

Over time, plastic headlight covers can get cloudy or yellowed. In fact, AAA reports that nine out of ten headlights are dirty or yellowed, greatly reducing vision. In addition to helping you replace your headlamps, many service centers such as City Chevrolet in Charlotte, NC can restore your headlight covers. Headlights can be restored at a fraction of the cost of replacing.

Today we want to talk about timing belts. They’re something that many Charlotte drivers don’t know much about and yet your vehicle won’t run if it’s broken – and it could cause many thousands of dollars damage if it does break. A broken timing belt is usually a tale of woe. Even though timing belt replacement is scheduled in the owner’s manual, it’s not the kind of thing that most Charlotte car owners remember because it’s not well understood.

Let’s review what a timing belt does. As you know, the engine’s power is generated in the cylinders. A piston rides up and down in the cylinder. During the first down stroke, an intake valve at the top of the cylinder opens and air and fuel is drawn into the cylinder. Then the piston returns to the top, compressing the fuel and air mix. At the top, the spark plug fires, igniting the fuel pushing the piston down in the power stroke. As the piston once again returns up in the final stroke of the cycle, an exhaust valve opens at the top of the cylinder and the exhaust is pushed out. The timing belt is what coordinates the opening and closing of the intake and exhaust valves. It’s called a timing belt because the valves have to open and close at just the right time.

Now, not all Matthews and Belmont vehicles have timing belts. Some have timing chains. Like the name implies, they use a chain rather than a belt to perform the function. It used to be that most engines used timing chains, which are extremely durable. Manufacturers started using belts rather than chains to save money in the manufacturing process. So now we’re left with a component that can break. They sort of shifted the problem to us. There are two broad categories of engine design: interference and non-interference. If the timing belt on a non-interference engine breaks, the engine simply stops running. That could be very dangerous depending on where you are at the time, but it causes no internal engine damage.

Interference engines, on the other hand, will get real messed up when the timing belt breaks, because the valves will actually fall down into the path of the pistons. Things get chewed up when that happens and it’ll cost thousands to repair the engine.

So, what are the warning signs? Unfortunately, there really aren’t any. There aren’t tell-tale sounds. In some vehicles, a technician from City Chevrolet may be able to see part of the belt for a visual inspection, but many have a cover that’s in the way. The reality is that if the belt slips even one notch, it might as well be broken for all the damage it’ll cause. There’s no middle ground.

So how can we avoid these problems? Simply replace the timing belt when your owner’s manual calls for it. It can be 60,000 miles; it might be 90,000 or 100,000 miles. The point is, if you have 60,000 or more miles, ask your City Chevrolet service advisor right away if your manufacturer requires a timing belt replacement.

Contact City Chevrolet to learn more about your car’s Timing Belt
You can find us at:
5101 East Independence Blvd
Charlotte, NC 28212
Or call us at (866) 409-3468

Sometimes you can go quite a while without a failure, but we’ve seen them happen within a couple of oil changes of being due. It’s not worth the risk.

What does it cost to replace a timing belt in Belmont or Mount Holly? Well, that really depends on what kind of car you have. I can tell you that it’s usually not very easy to get to the timing belt – you often have to remove some accessories to get at it. It isn’t a cheap procedure, but it’s a fraction of what it could cost to repair the damage caused by a failure.

At City Chevrolet we’re all about trying to prevent costly repairs, keeping you and your passengers safe and increasing your driving enjoyment. Thanks to AutoNetTV for their great auto video tips.