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The best explanation of a differential is from 1937

The first time I saw this video, I was hooked because I’m natively a bike guy and it starts off with motorcycle stunt riding. But the guys horsing around on those ol’ Harley VLs actually are the producer’s interesting and educational way to visually demonstrate why a...

Rust exhaust hole – ASE practice questions (VIDEO)

Description Which of the following is the most critical result of a rust hole in an exhaust system? A) Escaping exhaust gas B) Failed inspection C) Excessive noise D) High cost of repairMore ASE Practice Questions

Before selling a vehicle, make sure to remove personal data (VIDEO)

Description Smartphones, laptops and computers are normally cleared of all data before selling or discarding to protect personal information. Modern vehicles store all kind of information in their infotainment systems and that means they should be treated with the...

Dust Cap Tool Explained (VIDEO)

Description How many times have you seen a hub dust cap with ugly dents from a sloppy installation? A dust cap tool is handy for installations on customer vehicles. It helps to prevent damage while securely driving the cap into place.

Why a magnetic drain plug is a worthwhile upgrade (VIDEO)

Description Do your customers know the benefits of magnetic oil drain plugs? Swap out their standard drain plugs to help protect against unnecessary engine damage. Magnetic drain plugs are especially helpful for vehicles with long oil change intervals, as well as many...

Brake booster valve – ASE practice questions (VIDEO)

Description A customer states the brake pedal falls slightly when the brakes are applied while starting the engine. Technician A says that a faulty brake booster check valve may be to blame. Technician B says this can be caused by a leaking brake booster diaphragm....

The final days (and cars) of AMC

In the last days of AMC, two employees brought a video camera into the Kenosha, Wisconsin plant to document the end of an era. Billy and Danny take a thorough tour of the old AMC buildings and production line, which was producing its last L-body Plymouth Horizons and...

What is a core charge?

The article title is a question I asked when I was a young counterman, and most of you oldtimer mechanics and parts people of course know the story: the core charge is a way to be sure the smoked part makes its way back to the parts counter. A core charge is a deposit...

A few tips for ball joint removal

A few tips for ball joint removal

I was thinking about some of the stumbling blocks I had when I began turning wrenches a long time ago, and I recall ball joints sticking out as problematic. I could not for the life of me understand why other mechanics considered them “gravy work.” And that’s because...
Five things to know when working on HID headlights

Five things to know when working on HID headlights

While working on some high-intensity discharge (HID) headlights this week, I realized that soon many younger techs are likely to be inexperienced with these lighting systems—and it’s not their fault. In the transition years between halogen lighting and the LED era,...
What’s the best way to move tools about the shop?

What’s the best way to move tools about the shop?

I was recently off my feet due to some unplanned surgery. Normally I go stalking around the garage like the proverbial bull in the china shop, but not lately—my ankle was a mess. Have you ever had an injury or illness serious enough to impact the way you make a buck?...
How to service spark plugs the professional way

How to service spark plugs the professional way

The spark plug has a tough job to do, and it has to do it under extreme conditions. The terminal (top) end of the spark plug is connected to a high voltage supply source, the ignition coil. As current flows from the coil, a voltage potential builds between the center...