Undercar

  • Cooling system service remains on the "bread and butter" list for many aftermarket repair shops. Modern cooling systems certainly don't have to be serviced nearly as often as they once did. Top-notch shops always are adjusting their practices in ligh
  • Adding or subtracting as little as one pound of pressure from a NASCAR tire can impact how the racecar handles on the track. And that can spell the difference between winning and losing in a competition that tries to even the playing field by regulat
  • Struts affect steering, braking, stability, ride quality and road feel ? and they actually help keep the wheels firmly against the road so the tires can do their jobs, too. But unlike, say, brake pads that have wear indicators or sensors to indicate
  • Counterfeiting of R134a refrigerant we use in vehicles has heightened refrigerant purity fears because the primary contaminant is not only flammable but also toxic and explosive.
    Motor Age Magazine
  • Ambitious shop owners are always looking for ways to fill their shop bays and increase revenues. At the same time, they must limit their risk as they are bringing in new work.
  • Let's be honest, the original Honda Insight was an ugly car. In fact, most of the early hybrid offerings were ugly cars, at least in my humble opinion.
  • Electro-hydraulic braking systems aren't new, and neither are cars equipped with electronic parking brake systems. But they might be new to you as the fleet ages and starts showing up outside your door instead of dealerships. Here are some things you
  • In my automotive department, we do monthly inspections on all the college vehicles except the big busses. When I hand one of my students the job of inspecting a vehicle, it's interesting to note how serious some of them are about doing a really good
  • As a technician, you've likely had the opportunity to drive a fair number of different vehicles. Light-duty trucks ride differently than passenger cars, and compacts ride differently than full-size sedans. But all of their owners want a comfortable r
  • Rear differential service, for regular maintenance or for repair work such as replacing leaking seals, often involves removing rear axles and draining and replacing differential fluid.
  • The geometry designed into the steering and suspension system of a modern automobile directly determines how that vehicle will handle under a variety of conditions. Keeping that geometry in specification not only is a matter of following proper align
  • When faced with a drivability complaint, I want testing methods that will provide as much information in the shortest amount of time possible. Using a pressure transducer and a good scope instead of a mechnaical compression gauge can do just that.
  • Hybrid vehicles are an excellent choice for anyone looking to save money at the gas pump while helping the environment. Yet worries about expensive upkeep, ranging from high voltage (HV) battery replacement to the fear of dealer-only repairs, weighs
  • GM vehicles have used electric power steering (EPS) systems for almost a decade now, so odds are good you've already worked on a vehicle using the system. Interestingly, it's not just expensive or luxury models that use EPS. Because the system is suc
  • The radio is playing loud enough to drown out the kids in the back seat, who themselves are engrossed in the SpongeBob SquarePants video playing on the DVD. The phone is ringing, adding another demand to our attention as we try to stay focused on the
  • The headline might give you the impression that the subject is all about testing coils, spark plugs and plug wires. But we are referring to analyzing the electron behavior in the combusion chamber. The objective is to look at the effect of fuel mixtu
  • What are the most common brake complaints that concern your customers today? According to Rob Backode, product manager for Bosch Automotive Aftermarket Brakes, they have found that they involve noise, unusual or premature wear and dusting. In additio
  • Some shops delegate routine brake service to their less experienced technicians, because, after all, it's just a brake job. But they don't know what they don't know, do they? While the shop might have opened up time for its more experienced techs to
  • Customers seem to want their little sedan to ride like a big luxury car, even if it has a few hundred thousand miles on the clock. But diagnosing ride quality issues isn't always easy, especially because most components on higher-mileage vehicles jus
  • Manual transmissions will be an important element in meeting future fuel economy and emissions standards, worldwide. In terms of efficiency, manual transmissions are nearly 97 percent efficient in transferring engine power from the engien to the driv