Brake Dynamometer Testing: One Test is Worth a Thousand Expert Opinions
Some friction material companies market their products by saying they are third-party tested or tested on their own brake dynamometer. But, understanding what this really means is tough if you do not understand how a brake dynamometer operates. In the engine performance world, an engine dynamometer is associated with measuring performance. Brake dynamometers also measure
Servicing Cartridge FWD Wheel Bearings
Early front-wheel-drive wheel bearing service was difficult and time intensive. The most common arrangement was a pair of tapered roller bearings similar to that of a rear-wheel-drive vehicle, but with a spacer between the bearings. Servicing this arrangement took time and often special tools. Of course, an axle shaft went through the bearings and spacer.
Battery Tech: How to Inspect, Charge and Replace
The first test of a battery is a visual inspection. There are certain things a technician should look for when inspecting a battery. Some things to look for include the quality of the connection from the battery to the cables. Cracks or other leaks can cause acid spills. Missing battery hold down hardware can cause
Steering Racks: Leak Diagnosis & Repair
Power steering is a wonderful invention, especially for those who lack upper body strength or have puny arms. Years ago it was considered a luxury option mostly for elderly people who drove big Buicks, Cadillacs, Lincolns and Imperials. But today, everybody wants effortless steering, whether they drive an econocar or a three-ton SUV. Consequently, virtually
Volvo Service And Driveability: Ways to Simplify Repairs and Promote Maintenance
Keeping a record of scheduled maintenance and service repairs is probably the best selling feature when the time comes to trade or sell a vehicle. You know the type: They baby their car, and their friends and family want first dibs when they decide to sell it. In most cases, that level of upkeep is
Water Pumps: Why They Fail and When to Replace Them
If you’ve wondered how much work a water pump must do, remember that only about 30 percent of the heat energy produced by combustion results in mechanical energy. That estimate, of course, is a mathematical comparison between the heat value of the gasoline going into the engine, and the heat value of the mechanical energy
Cracking the Code: Understanding Friction Material Edge Codes…Ways to Simplify Repairs and Promote Maintenance
Just about every brake pad or shoe you install has a cryptic code printed on the side of the friction material. As a technician, being able to read this code is just as important as the Dewey Decimal system is to a librarian. The “Edge Code” can tell you information about the product you are
OBD II Diagnostics: Checking into Mode $06
In this scan tool diagnostics article, we take a look at Mode $06 functions which govern non-continuous monitors (EVAP, catalyst, EGR, etc.)
Understanding How a Battery Operates
In the automobile, the battery serves three main functions. First is the obvious. It supplies electrical power for the ignition system, starter, computer system and every other electrical component while the engine is not running (or any other instance when the alternator is not charging). Second, it serves as a reserve power source, should the
Monitoring Emission Efficiency With O2 Sensors
As modern OBD II technology marches on, it’s clear that the zirconia-based oxygen sensor now is being sold more as a basic repair part than as a preventive maintenance part, and it changes the way we diagnose and sell oxygen sensors. To illustrate the difference, let’s remember that an oxygen sensor replacement used to be
Detection Equipment is Key to Finding Refrigerant Leaks
Refrigerant leaks are the number one cause of poor A/C cooling performance. The amount of refrigerant in an A/C system is critical for proper cooling. Any loss of refrigerant reduces the system’s ability to transfer heat, causing the compressor to work harder and the system to cool less efficiently. To make matters worse, the refrigerant
Expand Exhaust Business with a Pipe Bender
Every automotive service facility is looking for ways to squeeze additional profits out of the jobs they are performing on a daily basis. For those shops offering exhaust service, or thinking about expanding their services to offer performance exhaust services, a pipe or tube bender will help reduce the amount of money spent on pre-bent