Monthly Archives: November 2016

Repair The Body Shop on You Car

When you last saw your car, it was a twisted mess being towed away from the scene of the accident. Now it’s weeks later and the car is parked in the driveway of a body shop. All you have to do is write a check and the car is yours again. But how do you know that everything under the surface has really been fixed correctly?

One key to getting your car fixed right is choosing a reliable shop in the first place. But you should still inspect the work performed before you drive away. To better understand what to look for, here are some insider tips from several knowledgeable veterans of the body shop business.

Have a Clear Understanding Up Front
The process of having your car fixed right starts when you drop it off, says Aaron Schulenburg, executive director of the Society of Collision Repair Specialists. Be clear on what the shop is going to fix and how it will do the repair. Get everything in writing. Ask about the shop’s warranty on its work. When you return, review the paperwork to confirm that the shop did the repairs correctly.

“A reputable repair facility will go through everything with you, walk you through all the steps they took,” Schulenburg says. “Good shops will even touch up bolts under the hood that have been scratched while being repaired.”

Clean Car Is a Must
Appearances matter. When you pick up your car, it should have been washed, cleaned and vacuumed, says John Mallette, owner of Burke Auto Body and Paint, in Long Beach, California. There should be no dirt or dust in the car and definitely no old parts in the trunk. Mallette says he even tries to wash down the engine compartment before he hands over the keys.

It can be a challenge to return a clean car to a customer, says Mike O’Connell, owner of Golden Hammer Auto Body in Los Angeles. With all the dust from sanding, he says, “body shops are the dirtiest places on earth.” He says his workers take precautions to keep the cars clean by using paper and masking tape to protect different areas. And then they carefully wash the car before the customer comes to pick it up.

Closer Inspection
If the car’s general appearance passes muster, take a close look at the area that was repaired. Mallette recommends looking for gaps between body panels first. If the gaps are obviously uneven, that’s a telltale sign of panels not being aligned correctly. Schulenburg says owners should make sure the doors open and close properly with good alignment.

Tips when you losing your keys

Our car keys have an uncanny ability to get lost inside coat pockets or underneath couch cushions — or to disappear altogether. Prior to the 1990s, this wasn’t a big deal. You could get a spare key at any hardware store or locksmith shop, not to mention at the car dealership, of course. But because it was easy to copy a key, it was also easy for a thief to steal your car. These days, advances in key technology have made vehicles more difficult to steal, but the price has been costlier key replacements.

Here’s a rundown of what you’ll face in the way of cost if you have to replace your key, along with some alternatives that could lower the bill. The prices quoted here are for Santa Monica, California, and West Los Angeles, an area where an hour of labor at an auto dealership can cost more than $100. Labor costs in your region may vary.

Basic Keys and Fob
A basic car key, which was common up until the mid-to late-1990s, has no security feature other than its unique cut. The shank, which is the long metal part of the key, has cuts and grooves like a house key. It’s easy to copy these keys. A locksmith doesn’t need any extra equipment: He can use the same machine he uses to cut other keys.

A basic key will cost about $3 at a locksmith. The only benefit of having the job done at the dealership would be to get the automaker’s branding on the head of the key. A Honda dealership near the Edmunds office charges about $12 for a basic key.

On most modern cars, an electronic key fob (also known as a remote or transmitter) is an integral part of the key set. At the dealership, the cost of replacing an electronic fob can range from $50-$90, depending on the automaker or complexity of the design. All fobs need to be programmed. Some dealerships will do it for free, while others will charge a half hour to an hour of labor.

There is a way around this fee, however. Most fobs can be programmed with a specific combination of button presses on the remote and key turns in the ignition. Some owner’s manuals will show you how to do it, and you can also find this information online.

Finally, there are aftermarket fobs that you can purchase online or from a locksmith. Like most aftermarket products, the quality will vary, but they are a less expensive alternative if you’ve lost your fob.

Transponder Keys
After the mid- to late-1990s, manufacturers began placing a transponder chip in the plastic head of the key. The chip emits a signal to a receiver in the ignition. If this “immobilizer” detects the wrong signal — meaning that the wrong key is in the ignition — the vehicle will not start.

A transponder key’s shank is either a basic key or a laser-cut key (more on laser-cut keys later). The major difference between a basic key and a transponder key is that the chip in the transponder key must be programmed before it can start the vehicle. All dealerships have the machines necessary to program the key. Some might program it for free, but others will charge up to an hour of labor. Most auto locksmiths should also have these machines.

Tires With Nitrogen

A member of the Dodge Challenger owners’ forum was buying a new car from a dealer and noticed green valve-stem caps on all four tires. The salesman told him that the tires had been filled with nitrogen, which would keep the tire pressure and temperature more consistent and that it would prevent tire rot from the inside out. It wasn’t a free add-on, though. The “nitrogen upgrade” was a $69 item on the supplemental window sticker. Another forum member later posted that his dealer was charging $179 for this same “upgrade.”

Some dealerships and tire stores claim that filling your tires with nitrogen will save you money on gas while offering better performance than air. But a closer look reveals that nitrogen has few benefits and much higher costs. For starters, a typical nitrogen fill-up will cost you about $6 per tire.

Why Nitrogen?
The Get Nitrogen Institute Web site says that with nitrogen tire inflation, drivers will note improvements in a vehicle’s handling, fuel efficiency and tire life. All this is achieved through better tire-pressure retention, improved fuel economy and cooler-running tire temperatures, the institute says.

This sounds great in theory but let’s take a closer look at each of those claims.

  • Better tire-pressure retention: Over time, a tire will gradually lose pressure. Changes in temperature will accelerate this. The general rule of thumb is a loss of 1 psi for every 10-degree rise or fall in temperature. The institute says that nitrogen has a more stable pressure, since it has larger molecules than oxygen that are less likely to seep through the permeable tire walls.In 2006, Consumer Reports conducted a year-long study to determine how much air loss was experienced in tires filled with nitrogen versus those filled with air. The results showed that nitrogen did reduce pressure loss over time, but it was only a 1.3 psi difference from air-filled tires. Among 31 pairs of tires, the average loss of air-filled tires was 3.5 psi from the initial 30 psi setting. Nitrogen-filled tires lost an average of 2.2 psi from the initial setting. Nitrogen won the test, but not by a significant margin.
  • Improved fuel economy: The EPA says that under-inflated tires can lower gas mileage by 0.3 percent for every 1 psi drop in pressure of all four tires. The theory is that since nitrogen loses pressure at a slower rate than air, you are more likely to be at the correct psi and therefore get better fuel economy.If you are proactive and check your tire pressure at least once a month, you can offset this difference with free air, and you won’t need expensive nitrogen. We think this invalidates the “better fuel economy with nitrogen” argument.

Windshield the Right Way

When faced with replacing a windshield, many car owners default to the lowest-price option. But if you take this route and are in a serious accident, your decision could cost you your life.

An incorrectly installed windshield could pop out in an accident, allowing the roof to cave in and crush the car’s occupants. Furthermore, when the front airbags deploy, they exert a tremendous force on the windshield and will blow out one that is not firmly glued in place.

“There are a lot of schlock operators” installing windshields, says Debra Levy, president of the Auto Glass Safety Council, which offers certification for installers. She says using original manufacturer’s glass is a plus, but choosing a good installer is even more important. To find a certified shop, visit Safewindshields.org and type your ZIP code into the box at the top of the page. Certification is valuable because it keeps installers up to date on advances in adhesives and changing automotive designs.

David Beck, one of two technicians at Windshield Express, near Salt Lake City, installs eight windshields a day and has been working in the auto glass business for 18 years. Beck agrees that certification is important and warns that there are many “tailgaters” — installers with no brick-and-mortar shop — who quickly “slam” windshields into cars with little regard for safety. They don’t handle the windshield correctly, don’t use the proper adhesives and leave the car unsafe for driving and prone to rusting and leaks.

“The thing I wish that drivers knew was that the windshield is the No. 1 safety restraint in your vehicle,” Beck says. The windshield is two sheets of glass held together by an inner layer of strong vinyl. When the windshield breaks, the vinyl holds the glass in place rather than allowing the shards to fall into the car and cut the occupants.

The windshield is a layer of protection that “keeps you inside the car and things out of the car,” Beck says. “This is not the place to cut corners on and go with the cheapest price.”

Steve Mazor, the Auto Club of Southern California’s chief automotive engineer, adds that if the windshield isn’t strong enough and an occupant is thrown from a speeding car, “the odds of survival are much less.” Thirty percent of all fatalities, he says, are due to people being ejected from the car.

An investigation by the ABC News program 20/20 on windshield safety shows technicians incorrectly installing windshields by not wearing gloves. The grease from their hands prevents the adhesives from bonding correctly, Beck explains. Another error that 20/20 caught was technicians failing to use all the necessary bonding agents, such as primer.

When you are looking for a good windshield installer, Levy recommends calling three shops and asking a few qualifying questions beyond just price and certification.

Levy says to ask the shops if they use original equipment glass, which is usually of higher quality and fits better. Also, she suggested asking how long the car should sit after the installation is complete. “If they say you can take the car right away, you should run in the opposite direction,” Levy says. A car should sit at least one hour before being driven and sometimes up to 12 hours, she says.

Beck says if you take your car to a dealership for a windshield replacement, it will just subcontract the job to a glass shop and then mark up the price about 30 percent. He recommends going directly to the glass shop to save money. However, when a car is new, the dealership might be the only place to stock the glass, as was the case for a 2011 Infiniti M56 Edmunds long-term test car where the windshield replacement cost $1,300.

Pressure Monitoring Sensors

Miniature sensors that regulate automobile performance are designed in a very particular way to operate properly while housed directly on moving automobile tires. They need to have the sensitivity to pick up measurements while in motion and the durability to withstand the elements.

Tire pressure is the unsung hero of automobile performance. When inflated to the proper pressure, tires are the exact shape that the designers intended. As air pressure decreases, the tires need more energy to move. Drivers can easily forget to maintain their tire pressure in the day-to-day routine of moving from one place to another. Punctures can take place and go completely unnoticed. That is why having an onboard sensor that alerts the driver when it’s time to add more air makes all the difference. Creating these sensors requires careful consideration of all the fine details, and simulation provides the tools for finding just the right design.

Tire Pressure Sensors Shape Driving Experience

One consequence of low tire pressure is a significant reduction in fuel economy. Additionally, vehicles running on low tires can add tons of greenhouse gases to the atmosphere over time. Low tire pressure can also make it hard for the vehicle to stop, or cause the car to slip on wet surfaces. Automakers are generally required to attach pressure monitoring sensors to wheels that inform drivers if a tire falls below the intended pressure, and Schrader Electronics is currently the global market leader in tire pressure monitoring technology.

Schrader Electronics manufactures 45 million sensors annually and provides sensors to leading automotive companies including GM, Ford, and Mercedes. For a sensor to survive road conditions throughout the life of a vehicle, reliability and durability are key. Consideration is given to shock, vibration, pressure, humidity, temperature, and various dynamic forces when designing for the necessary functions, geometry, and materials. Christabel Evans, an engineer with the Schrader Electronics mechanical design team, has been using finite element analysis (FEA) and multiphysics simulation to build successful, efficient tire sensors for all kinds of vehicles.

Designing Better Sensors with FEA

The Hi-Speed Snap-In Tire Pressure Monitoring Sensor, shown in Figure 1, is a frequently-used product at Schrader that mounts directly on the wheel assembly and measures tire pressure—even when the car is in motion. When the tire pressure decreases too much, a warning goes off, alerting the driver that it is time to stop and re-inflate the tire.