AUTONET TV

When Metal Meets Metal (Wheel Bearings)

What part of your vehicle has little metal balls inside that are lubricated and allow you to cruise on down the road?  They are wheel bearings, and automotive designers might argue they are human beings' second greatest invention of all time (the first is, of course, the wheel!).

You have a wheel bearing at each wheel.  They allow your wheels to turn freely, minimizing friction that would ordinarily slow you down when metal meets metal.  When one of your wheel bearings starts to go bad, it lets you know. A wheel bearing does its work quietly when it's in good health but starts getting noisy when it isn't.  People describe the noise differently.  Sometimes it sounds like road noise, a pulsating, rhythmic, sound.  That pulse speeds up when your vehicle speeds up. 

Here's what's happening when you hear that sound.  As mentioned, the bearing has these little metal balls inside a ring.  They have a lubricant inside to reduce friction between the balls; modern wheel bearings are sealed and they're intended to do their job without any maintenance. 

Wheel bearings take a beating; you hit some rough potholes or go over some uneven railroad tracks. Sometimes water can get into a bearing and reduce the ability of the lubricant to do its job.  Time starts to take its toll, too. When the lubricant isn't reducing friction like it should, the bearing can heat up. One of those little balls can start shedding pieces of metal and soon those shards start grinding up the other balls.  Friction takes over and soon your wheel isn't turning smoothly. That's what's causing the sound.  If a wheel bearing is not fixed, it could eventually seize up completely, and you can be stranded.

It's a lot easier if you heed the early warning signals, that pulsating noise.  Now, sometimes a similar noise can be caused by a bad tire, but in either case, it's important to have it checked out. Our Gilmore's Auto Service technicians will be able to tell you fairly quickly what the problem is and offer a solution.

Wheel bearings generally don't fail often and usually last from 85,000-100,000 miles/140,000km to 160,000km. But consider them a long-term maintenance item that, once fixed, will keep you heading smoothly to the next destination.

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net

Let's Clear Some Things Up (Headlight Restoration)

You know how exposing your skin to sunlight can cause sunburn and other unhealthy things.  Sunlight can also create major problems for your headlights.  After they've been exposed to ultraviolet light, acrylic headlights can yellow and fog due to oxidation.  And when that happens, less light can pass through the plastic, reducing the effectiveness—and safety—of your headlights. 

It's not just the UV light that causes headlights to turn cloudy.  Road grime and debris gets kicked up and can scratch the plastic, diffusing the light that should pass through them when they're clear.  Plus, when your vehicle was new from the factory, the headlights had watertight seals all around to prevent moisture from getting into them and fogging them up with water vapor.  Just like clouds can hide the sun, tiny water molecules can diffuse the light from your headlight bulbs. 

Sure, you could buy replacement parts and start fresh.  But the good news is many vehicle repair facilities can restore your original headlights to perform like they did when you first bought your vehicle.  Here's how it works:

• A technician will protect your vehicle's paint by either taking the headlights out or by taping off the paint near the headlights and leaving them in place.
• Residue is removed from the headlight surfaces by wet sanding to remove the oxidized plastic.
• Using special compounds, the technician will buff and polish the surface of the lens so it looks as smooth as glass. 
• The newly-polished plastic is then sealed with wax or a special sealant designed to keep them operating like new. 
• If the seals that keep the moisture out of the inside of your headlights have dried out or cracked, they will be restored or replaced to keep condensation from forming again.

Visibility at night is vital for safe driving, and if your headlights aren't performing up to their potential, the less you'll be able to see ahead of you.

There are many advantages of having your headlights restored rather than buying new or aftermarket replacements.  It's friendlier to the planet since plastics are made of oil, so it's reducing the amount of plastic that is manufactured.  And it's usually cheaper to have your headlights restored rather than replaced.

Consider headlight restoration a way to literally recycle those parts of your vehicle.  That seems to be perfectly clear!

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net

When Your Tires are Tired (Tire Replacement)

Tires are so reliable these days that few drivers pay much attention to them.  But tires wear out.  They have a tough job since they are the only point of contact between your vehicle and the road.  They have to get your vehicle going from a stop, keep it going, make sure it is headed in the direction you want it to go, and –importantly – slow and stop it.  

The only time many drivers think about their tires is when there's a problem, such as a flat.  Or, they may lose control when they find their vehicle isn't stopping or steering like it used to.  One major safety organization estimates that 1 out of every 11 crashes is related to a tire issue.  

Many of those problems are caused by tire tread wearing out.  The rubber is worn off by friction after hours and hours on roads.  The sidewalls can also be damaged by your tires hitting curbs, potholes, or other debris. Plus, rubber ages as time passes.  We recommend you let us inspect your tires periodically so we can spot potential problems before it's too late.  

When it's time for you to replace your tires, it's important to know which type is right for your driving habits and what environments your tires usually encounter.  The most common tires are called all-season. As the name says, they are pretty good in every season and their tread lasts a long time.  In other words, they're good all-purpose, all-around tires.

Another option is a performance all-season tire, which has a little more grip but won't last as long. Then there are ultra-high-performance tires (UHP) which have wonderful grip and handling but an even shorter lifespan. They also aren't the greatest in slippery conditions.

For those who live in more extreme climates, especially where there is a lot of snow, winter tires are definitely worth considering because their performance in cold, snowy conditions can make a huge difference in traction, improving steering, and stopping.  Some places require winter tires during certain periods of winter.

Don't underestimate how much of a difference tires can make on your vehicle.  Sure, you probably don't pay much attention to them, but they are one of the most important investments you can make, and they can pay valuable dividends when you need them to come through for you.

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net

10 Things That Are Lowering Your Fuel Economy

Regardless of whatever current gas prices may be, if you could use less gas, wouldn’t you? Well, here are 10 things that are robbing you of better fuel economy that you can change for the better:

   •    Not enough air in your tires.  Underinflated tires have a smaller rolling diameter and more resistance to rolling.  Keep them inflated properly, plus ask us about more fuel-efficient tires.

   •    Faulty oxygen sensor.  A faulty or dirty oxygen sensor can cause your engine to burn too rich a mixture of air and fuel.  That can also trigger a Check Engine light.  Have us check yours.

   •    Oil age and type.  Contaminated or improper viscosities of engine oil can create more resistance in your engine.  Have regular oil changes and consider newer high-mileage oils.

   •    Bad wheel alignment.  When your wheels aren’t lined up straight, they have more resistance.  Let us check your alignment and straighten things out if necessary.

   •    Aging ignition system.  When’s the last time your spark plugs, spark plug wires and coils were changed? Misfires can rob you of good mileage.

   •    Dirty fuel injectors.  They can be inefficient if they’re not clean.  Have us check yours to make sure they’re working as they should.

   •    Fouled fuel filter. After filtering impurities out of your fuel, the filter may be clogged and affect your engine’s performance.

   •    Worn out or stuck brakes. This creates drag on the wheels and prevents you from rolling freely down the road.  Have us inspect yours to see how yours are.

   •    Worn piston rings.  These form a seal in the cylinder walls so you have top compression. When the seal is sloppy, down goes your fuel pressure and mileage.

   •    Poor maintenance.  If you don’t keep your engine’s systems running efficiently, they can nibble away at your fuel economy.  

Let us help you keep your eye on each one of these so you aren’t wasting money and gas.

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net