Carley’s Corner: Biodiesel Boom or Bust?
I grew up in the farm state of Iowa. Though I lived in the city, a short drive in any direction would put me in the midst of sprawling corn and soybean fields. At the time, nobody thought food crops might have potential for being an alternative fuel source. But when the Organization of Petroleum
Rotating Electric Update
Question: There is a lot of talk in the industry regarding returns on non-defective parts. So, how can repair shops and technicians reduce the number of warranty returns on rotating electrical parts? Answer: Misdiagnosis of starting and charging problems is the main reason many starters and alternators are returned. The issue isn’t the quality of
Timing Belt Replacement: Tried and True Repair Method Works Every Time
and below the intake manifold. When this unit fails, it tends to look like the head gaskets are blown. The oil mixes with the coolant and so on, leading to catastrophic engine bearing failure. Saab recommends flushing the cooling system with Shout, a cleaning agent found in many stores. Saab also recommends changing the timing
Mercedes-Benz: Transmission Service and Other Maintenance Essentials
Consistently rated as well engineered and well built, the Mercedes line fills almost every class of vehicle today, from small fuel-efficient people-movers like the Smart Car, to large over-the-road trucks and every niche in between. Our shop performs routine maintenance and more involved repairs on hundreds of Mercedes vehicles every year. Most of the models
Battery Charging: All Charged Up!
A battery charger is something every shop should own, and most do. But battery technology has changed in recent years. Battery chargers that were designed for older conventional lead acid batteries (called “flooded” cell batteries because the cells are filled with liquid electrolyte) may not be the best choice for newer batteries with absorbent glass
Selling Services: Providing Manual Transmission Clutch Replacement Service
Because a good “stick shift” driver can always squeeze a few more miles per gallon out of a manual transmission or otherwise out-perform their automatic transmission counterparts, it’s no wonder that clutch replacements continue to be a good business for repair shops. In most cases, a routine clutch replacement requires very little in special tooling
Fundamentals of Electrical System Diagnosis
Electrical principles, like voltage, amperage and resistance, can be described as cars passing along the roadway. Voltage would be the vehicle’s speed, amperage would be the number of vehicles on the road at the same time, and resistance would be the potholes in the road’s surface. Basically, electricity is a supply of atoms with an
Ignition Misfires
A flashing Check Engine light and a P0301 to P0312 diagnostic trouble code is a sure-fire indication that one or more cylinders are misfiring. Occasional misfires may pass unnoticed, but a steady misfire is hard to miss. The engine usually feels rough, lacks power and uses more gas than usual. Sometimes a misfire may feel
Coolant Service
It’s Getting Hotter Out There; Know How to Keep Your Customers Cool Coolant testers, pressure testers, flushers and exchangers. These are the tools and equipment shops need to keep their customers’ cooling systems cool. We’ve had an unusually hot summer this year. Record high temperatures across the country have left many vehicles steaming alongside the
Automatic 4WD Hub Replacement
Automatic hubs are used on many 4×4 trucks to disengage the front wheels when four-wheel drive is not needed. Disconnecting the front wheels reduces friction and may improve fuel economy as much as one mile per gallon depending on the vehicle. A one mpg difference may not sound like much, but with gas costing around
A/C Update: Bad A/C Blowers & Fuses
On most vehicles, the blower motor typically operates at one of several speeds ranging from low to high in several steps
Diagnostics Through CAN Networks
Since model year 2003, a growing number of domestic and import vehicles have been built with a new onboard communications protocol called CAN (Controller Area Network). CAN is essentially an engineering standard for how computers and modules talk to one another via the serial data bus in a vehicle’s wiring system. It’s a high speed