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Shop Press is the news and idea hub for everything related to working on cars and trucks, focusing on repair, technology, and wrenching lifestyle.

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Colin Chapman: The Philosopher of Motion (Part 1)

Car designers have a lot of brain synapses firing. Some designers are driven by the pursuit of beauty, while others are motivated by the pursuit of speed. Giorgetto Giugiaro, Marcello Gandini, and Battista Pininfarina, though responsible for cars that raced, were...

Maximum Voltage Reading – ASE Practice Question (VIDEO)

Description Technician A is using the min/max function of a digital voltmeter to test the battery and charging system on a customer’s vehicle. He notes a max reading of 17.2 volts has been recorded. Technician B says that the alternator has failed and is overcharging....

The Story of Dagmar Bumpers

If you’ve read my work here on Shop Press, you know I’m a sucker for chrome and mid-century automotive design. This week, I'd like to take a look at one of my favorite examples of that era: "Dagmar bumpers," the colorfully common slang used to describe the...

Should You Charge More When Dealing with Tire Sealant? (VIDEO)

Description Aerosolized tire sealant is widely available, and in some vehicles, it is used in place of a full-size spare. While this “tire repair in a can” might be the best solution in a jam, it creates a messy, stinky situation for a tech changing the tire for a...

An Ode to “Car Talk”

Back in the early aughts, I lived in the Washington, D.C. area for about nine years. Since my parents live in Pennsylvania, this necessitated many three-and-a-half-hour drives (as little as three, if I was lucky) back home for holidays or just a regular visit. At the...

Testing Battery State of Charge – ASE Practice Question (VIDEO)

Description Technician A and Technician B are discussing battery testing. Technician A says that an open circuit voltage of less than 10.5 volts indicates a bad battery. Technician B says that a reading of 12.5 volts indicates an 80% state of charge. Who is correct?A)...

PSA: Be Safe With Carburetor Cleaner, Too

Recently, I wrote about how brake cleaner can be hazardous if not used correctly, and how you should take safety precautions when using it. One of our readers had an insightful comment on the piece.Now, I think it’s debatable that carburetor cleaner is more hazardous...

The Real Meanings Behind OBD-II Diagnostic Trouble Codes (VIDEO)

Description When the check engine light (CEL) pops up and your OBD-II scan tool displays a code, that’s only the start of the diagnostic process. By breaking down the structures used to create DTCs, you can learn how to “decode” beyond the simple descriptions...

Engine knock – ASE practice questions (VIDEO)

Engine knock – ASE practice questions (VIDEO)

by | Jul 16, 2024

Engine knock – ASE practice questions (VIDEO) Description An engine exhibits a knocking noise. During a cylinder power balance test, the noise abates. Technician A says the noise is likely worn big-end bearings on the connecting rod. Technician B says the noise...
“Can I borrow a…”

“Can I borrow a…”

by | Jul 11, 2024

I recall being very alarmed at how far the door spring traveled. As a teenager in my first job at a dealer, I was working on a small S-10 truck that needed door hinge pin bushings. I levered that door spring out of its perch with a slotted screwdriver like a goon and...
A visit to Elite JDM (VIDEO)

A visit to Elite JDM (VIDEO)

by | Jul 9, 2024

A visit to Elite JDM (VIDEO) Description Recently we took a trip to Dorman Proving Grounds manager Nick D’Alessio’s personal shop, Elite JDM. While we were there, we shot some videos about some fascinating things we found in his shop. We decided to put those...