AUTONET TV

Automotive Tips from Darrell's Firestone: Alignment Inspection

Uneven tire wear, the car pulling to one side or a steering wheel that is off-center are signs for Farmington drivers that their wheels may be out of alignment.

When doing an alignment inspection, the service advisor at Darrell's Firestone will inspect your tires for uneven wear as well as suspension and steering parts for signs of wear or damage. He?ll also compare your current alignment with the vehicle manufacturer?s settings.

Your vehicle owner?s manual will have a recommendation for when to check alignment. Of course, this recommendation is based on normal driving. If you have been in a crash, hit a curb/pothole, frequently drive off-road around Farmington, or notice any symptoms of misalignment, have your Darrell's Firestone service advisor perform an important alignment check.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

Alleviate the Creaks and Squeaks (Chassis Lubrication)

If your vehicle creaks and squeaks when you drive down the road, it may mean that some of the metal parts are rubbing against each other and need to be lubricated.  Those could be parts of the suspension, steering system and the drivetrain. 

Years ago, most vehicles had to have their chassis (what you think of as the frame) regularly lubricated.  Newer vehicles are made with what some call "lifetime lubrication," but there are still parts of the chassis that need to be maintained with lubricants.  Your service advisor can help you know when that needs to be done.

In your owner's manual, the vehicle's manufacturer lists components that need regular maintenance. Things like u-joints, steering joints, sway bars, bushings and joints in the suspension. Some of them may have that "lifetime lubrication," while others may not. When you bring your vehicle in for service, a technician will look for any parts that have grease fittings.  They will inspect these components, clean the fittings so dirt and other contaminants won't be forced into the part and then lubricate them with a lubricant that meets the manufacturer's specifications. 

Sometimes a chassis lubrication is done at the same time as an oil change.  That's also an ideal time for the technician to check other parts of your vehicle that may need attention.  That could include greasing other parts such as the fuel door, trunk and door hinges, suspension springs and door latches.

Times have changed since the days when a "lube" job was synonymous with an oil change. Depend on your owner's manual and advice from your service advisor to know when "grease" is the word—and appropriate for your vehicle.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

Upsizing Wheels and Tires With Darrell's Firestone

Many Farmington drivers want to accessorize their vehicle - you know, make it theirs. One of the easiest ways to get a custom look is to get some new wheels. There are thousands of wheel designs at Farmington area tire shops to get you the look you want. And for many Farmington drivers, that look includes bigger wheels. It used to be that cars came from the factory with 15 or 16 inch wheels. Now 16, 17 and even 18 inchers are standard. And the factories are offering optional wheel packages up to 20 inches or more.

So let's talk about what to consider when you want to upsize your wheels. It's not exactly a DIY project, so you need to know a thing or two before you get started. The most important term to know is rolling diameter. The rolling diameter is simply the overall height of your tire. Unless you want to modify your vehicle suspension, you'll want to keep your rolling diameter the same when you upsize your wheels.

Let's think about those three golden doughnuts in front of you. They're all about the same size. So if we pretend they're tires, they would have the same rolling diameter. The doughnut hole is the size of the wheel. Now pretend we've made the hole bigger on some. That's like having a bigger wheel - but the rolling diameter is the same.

It's important to keep the rolling diameter the same for several reasons. First of all, if the tire is bigger, it might not fit in the vehicle wheel well. Next the speedometer, odometer and anti-lock brake system are all calibrated for the factory rolling diameter. In order for your anti-lock brakes to work properly, the rolling diameter must stay within 3% of the factory recommendation. If you ignore that, you run the risk that your anti-lock brakes won't work properly.

Some have vehicles with electronically-controlled suspension that will be negatively affected by changing the rolling diameter. Let's think about the doughnuts again. You see, as the size of the wheel gets bigger, the sidewall gets shorter. The tire holds less air, so the sidewalls are made stiffer to compensate.

Low profile tires from top manufacturers use special compounds that give the sidewall the strength it needs without compromising ride quality. As you increase your wheel size, you'll typically get a slightly wider tire. This means that you have a larger contact patch. The contact patch is part of the tire that contacts the road. Because there's more rubber on the road, the vehicle will handle better. And braking distances will be shorter. A lot of Farmington folks with trucks or SUVs love the extra control.

MI drivers need to watch out that the contact patch isn't so big that the tires rub in turns or over bumps. What we're talking about here is fitment. Your tire professional at Darrell's Firestone can help you get this right. He'll install your new wheels, add spacers if needed to make sure your brakes fit inside your new wheels and get you rolling.

Also, if you drive off-road in MI a lot, you may need a higher profile tire to protect your new rims. And make sure your new tires have the load rating you need if you tow a trailer or haul heavy loads. Again, your tire professional at Darrell's Firestone knows how to help.

And don't forget about tire pressure. If you have larger rims, your new tires will hold less air and they'll need to run a slightly higher pressure. Forget that and you'll wear your tires out fast. Finally, get an alignment at Darrell's Firestone after you get your new shoes. 

Stop by Darrell's Firestone to learn more about how you might upsize your wheels or tires.

You'll find us at:

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

Catalytic Converter Replacement

Many of us have become aware of how important it is to keep our planet’s air clean, and your vehicle has a key component that helps do just that: the catalytic converter.  It’s in the exhaust system, and its job is to superheat unburned, harmful byproducts in the exhaust, so they don’t get spewed out into the atmosphere.

There’s another important purpose the catalytic converter has: it improves your vehicle’s efficiency. 

Most of us don’t give the catalytic converter much thought until it breaks or someone steals yours, something that’s been happening much more frequently in recent years.  The reason people steal them is that catalytic converters use precious metals such as platinum, palladium, and rhodium to do their job. So, they contain valuable materials thieves can sell.

The most likely reason you will have to replace your catalytic converter is age.  The more distance your vehicle travels and the more hours your engine runs, it’s putting wear and tear on the converter.  T

You can tell if your catalytic converter is failing by looking out for these signs:

• Smell of rotten eggs inside your cabin or outside near the exhaust
• Check Engine light is on
• Vehicle power isn’t what it used to be, or fuel economy has plunged
• Vehicle backfires

If you need a new catalytic converter, it can be replaced with an original equipment part if it’s available, or an aftermarket converter can be welded into the exhaust pipe.  It’s not uncommon for oxygen sensors to need replacing as well.  The technician will also check for other problems in your powertrain that may have contributed to your converter failing.

Check to see if an emissions test is required where you live.  If it is, you will have to have a properly functioning catalytic converter to pass it.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net