Archive for December, 2010

Stop It! You Need Good Brakes

Thursday, December 23rd, 2010

Good brakes are obviously very important. If you’ve ever had your brakes go out while you’re driving around the Tallahassee area, you’ll know how terrifying it can be. Today we’ll focus on how to tell when you have a brake problem, and how to make good repair choices.

Often, the first indication that something’s wrong with the brakes is an unusual sound. It could be a squeal, chatter or grinding sound.

Some brake pads have a little piece of metal embedded in them that will make a squeal or chirping sound when the brake pads have been worn down to the point that they need to be replaced. It’s an early warning indicator.

When you hear that sound, schedule an appointment at Auto Super-Service Center soon.

Now a chattering sound is more urgent. That usually indicates that something is loose. It could be a brake pad or even the brake calipers. If one of those parts falls off, you could have some serious trouble stopping the vehicle. It would be a good idea to park it until you can get into the shop.

A grinding noise usually means that the brake pad is completely worn away and the metal parts of the brake are rubbing directly on the metal brake rotor. That means the rotor is being damaged and will need some work. More on that later.

Another warning sign is that your brake pedal may feel soft and spongy – or it may even feel very hard to push in. Both could mean trouble. And of course, you may get a dashboard brake warning light.

Now when it comes time to replace your brake pads, you have a choice to make. You can get the same pads that came standard on your vehicle. You can expect the same performance and durability as with the pads that came on the car from the factory.

Now you can also get a budget brake pad. Sometimes drivers insist on lower cost pads. That’s OK if the budget demands it, but you need to be aware of the trade offs. Lower grade pads are usually noisier, so you’ll have to live with more noise when you apply the brakes. They also tend to generate a lot more brake dust, you know, that black dust that accumulates on your wheels. And they probably won’t last as long either. In our opinion, that’s a lot of compromise for just a few dollars in savings.

You can also choose to buy premium brakes pads. These perform at higher specifications than the factory pads. You can expect quieter operation, less brake dust and better stopping power.

Now, getting back to the rotors. The rotors are the discs that the brake pads clamp down on to stop the vehicle. If you’ve been driving with completely worn brake pads, you’ve scratched grooves into the rotors. If the grooves aren’t too deep, the rotor can be resurfaced. A thin layer of metal is cut off the surface of the rotor to make it smooth again.

Now, if the grooves are too deep or if the rotor has already be resurfaced before, there may not be enough material to resurface and still have a rotor that’s thick enough to safely stop the vehicle. In that case, the rotor will have to be replaced.

Something that’s often overlooked is the brake fluid. Your manufacturer has a recommended schedule for evacuating the old brake fluid, cleaning the system and refilling it with fresh brake fluid. This is really important to brake performance.

So here’s the bottom line: if you suspect, inspect. If you notice any of these warning signs, have your brakes inspected. Your advisor can help you make the repair decision that’s right for you.

Share

Posted in Brakes | No Comments »

Drive Train – What You Need to Know In Tallahassee

Wednesday, December 15th, 2010

One Tallahassee automotive service issue that doesn’t get much attention is driveline service. Drivelines don’t get talked about very much around Tallahassee, but they’re very important. First let’s define what the driveline is:

Taking a small step back, the power plant is comprised of the engine and transmission. The driveline starts there and includes all of the components that transfer power from the transmission to the wheels.

That’s not really a lot of components, but they handle the full force of the engine. Without the driveline you’re not moving. So we need to take good care of it. The driveline components differ depending on whether your vehicle has front wheel drive, rear wheel drive, all wheel drive or four wheel drive. For purposes of our discussion, we’re going to have to over simplify a bit.

If you are ready to have your drive train looked at, give us a call:
Auto Super-Service Center
3781 N. Monroe St.
Tallahassee, Florida 32303
Call Us at 850-562-4608

Let’s start with front wheel drive. The point where the transmission stops and the driveline begins is a little blurred with front wheel drive because the transaxle houses both the transmission function and the differential function. The half shafts that send power to each front wheel, come out of the transaxle. The shaft is connected to the wheel by a constant velocity, or CV, joint. The CV joint is protected from dirt and water by an airtight, flexible rubber boot.

So, driveline service would include properly servicing the transaxle and inspecting the CV boot to see if it’s torn or loose. If it is, it needs to be replaced and the CV joint inspected for damage. Repairs may be in order. Besides visual damage to the airtight CV boot, you might hear a clicking noise when turning. Recommended maintenance for the transaxle and CV joints will be spelled out in your owner’s manual or check with your Tallahassee service advisor.

On to rear wheel drive. The driveline for a rear wheel drive vehicle starts with the driveshaft – that long tube that connects the transmission with the differential on the rear axle. Some vehicles in Tallahassee have a two piece drive shaft. The shafts are connected to the transmission and the differential with big universal joints. You’ve probably heard the term ‘u-joints‘. These joints can wear out, just like the CV joints in front wheel drive vehicles. You may hear some clunking or feel a jolt when shifting into drive or reverse – if you do, get your driveline inspected.

The differential on the rear axle sends power out to each rear wheel through half shafts in the axle. The differential fluid needs to be drained periodically and replaced with clean fluid. When the seal on the end of the axel is damaged or leaks, the axel will need to be serviced. The routine maintenance item here is differential service. Be sure to check your owner’s manual or Tallahassee service advisor for intervals.

Now let’s go on to all wheel drive. Remember that the difference between all wheel drive and four wheel drive is that an all wheel drive vehicle is essentially providing power to all of the wheels all of the time. The vehicle may be able to shift more of the power to the front or to the back depending on where you need traction. All wheel drive vehicles are designed to work well on dry pavement. Even some high-end sports cars from makers like Lamborghini and Porsche have all wheel drive.

Some all wheel drive vehicles are designed to work well off-road, but all hard-core rock crawlers are four wheel drive. These guys thrive in mud, sand, rocks and hills – but they don’t work well on dry pavement when they’re in four wheel drive. So they have the option to shift to rear wheel drive only on dry pavement.

Most all-wheel drive vehicles are very similar to front wheel drive when it comes to the front end. They also have a center differential that transfers power to the rear differential. Connecting it all is a shaft from the transaxle to the center differential and another from the center differential to the rear differential. So all of the normal front wheel drive service is required as well as service to the center and rear differentials.

Four wheel drive can be thought of as a rear wheel drive vehicle that can also send power to the front axle. There’s a transfer case in the middle of the vehicle that can be shifted to send power through a drive shaft to a differential on the front axle. So you need differential service for the front and rear differentials and for the transfer case as well.

The bottom line is that the maintenance schedules are in your owner’s manual. Your Tallahassee service advisor can answer any questions you’ve got. If this is the first time you’ve heard some of this stuff – it’s time to ask someone at Auto Super-Service Center if any of it needs to be done now.

Watch our auto tips video from AutoNetTV.

Share

Posted in Drive Train | No Comments »

Looking Down the Road – Headlamps

Thursday, December 9th, 2010

If you’ve ever been driving around Tallahassee and had a headlamp go out, you’ve probably just wanted to replace the bad bulb. If your car uses halogen headlamps, they dim over time. So if you just put in one, they won’t have the same brightness which can be distracting and will affect your field of vision.

To have your headlights inspected, visit us at Auto Super-Service Center. We’re at 3781 N. Monroe St. in Tallahassee, Florida 32303. Or give us a call at 850-562-4608

Experts in Tallahassee recommend replacing your halogen headlamps every year. It’s easy to remember if you do it when daylight savings time changes in the fall. That way you’ll have bright headlamps for those long Tallahassee winter nights.

There are other types of headlamps in addition to halogen. There are the old standard bulbs that have been around for decades. These are OK, but you can usually upgrade to halogen. They cost a little more but you can’t believe the difference. If you do a lot of night driving you might want to use a premium halogen bulb that filters out the yellow hues and give a very white light that’s a lot like daylight.

You may have noticed those bluish headlights on luxury cars. They are high intensity discharge or, HID lamps. They really light up the road. You can upgrade to HID on some vehicles. These cost quite a bit, but they’ll last for the life of your car. If you want your Tallahassee friends to think you have HIDs, you can get halogens with a bluish tint – no one needs to know.

Seriously, though, night driving is all about reaction time – time to stop – time to get out of the way. You can’t react to what you can’t see. You need headlamps that’ll give you a good view down the road and good peripheral vision as well. And your headlights need to be aimed correctly so you can see and also, to keep your lights from shining off into on-coming traffic.

You may have seen older vehicles with headlights that are awfully dim and maybe even yellow. That’s because the plastic headlight lenses have gotten cloudy and yellowed with age. They can be replaced, but many Tallahassee service centers offer a service to restore the lens that’s a lot cheaper.

You can’t drive if you can’t see. AAA reports that nine out of ten vehicles have dirty or yellowed headlamps. So run the window squeegee over your headlights when you gas up to clear the dirt and bugs. Get your lenses restored if they need it and don’t forget to replace your standard or halogen bulbs every fall.

Share

Posted in Maintenance | No Comments »

Direct Fuel Injection Update From Auto Super-Service Center

Thursday, December 2nd, 2010

For those of you in Tallahassee Florida who pay attention to these things, you may have been hearing about the new direct injection engines and want to learn more about them. Some deliver the power of a V8 with the economy of a V6.

For example, in one family of engines the conventional V6 makes about 250 horsepower. The direct injection version of the same engine makes over 300 horsepower and gets essentially the same gas mileage. The turbocharged version makes over 350 horsepower.

So what are the differences from a conventional engine?

The core difference is in the fuel injection system. The system most vehicles use now is called a port injection system. The fuel injector squirts fuel into a port just outside the cylinder where it’s then drawn into the engine with the air.

With a direct injection system, the injector squirts the fuel directly into the cylinder. The gain in power and economy come because fuel injected directly into the cylinder during the combustion cycle is burned much more efficiently.

First, the fuel is squirted in at hundreds of times more pressure, so it’s atomized much better and burns cleaner and stronger. The other big advance is in electronics. Faster engine management computers can control the additional precision required to manage direct fuel injection.

Fuel injectors are precision instruments. They have to deliver a precise amount of fuel at exactly the right time. The design of the engine also dictates a particular spray pattern for the fuel. If a fuel injector is dirty or gummed up, it can’t do its job as well. That means less power and worse fuel economy for your all passenger cars & light trucks and can lead to damaged fuel injectors.

Replacing fuel injectors isn’t cheap. Direct injection injectors are even more expensive because of the extremely high-pressure they use. Same thing for diesel fuel injectors; we’re talking mortgage payment-range to replace a set of diesel injectors.

A professional fuel system cleaning from Auto Super-Service Center gets out the gum and varnish in the whole system, including the fuel injectors. Keep those injectors clean and they’ll last a long, long time.

Share

Posted in Fuel System | No Comments »