Shop Press

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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Hot Off the Press

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...

What’s Torque-to-Angle All About?

Torque-to-angle, also known as angle-torque or torque-plus-angle, is a fastening method that combines an initial torque application with a subsequent angular rotation to achieve precise bolt or fastener tension. This technique ensures consistent clamping force,...

Our Contributors

Jonathan Roth

Jonathan has been a technical writer for Dorman for over a decade. If you’ve read any Dorman instructions instead of chucking ’em, he’s the guy who wrote them. He has also worked on the Dorman Helps benefit car show since 2013. Prior to writing for Shop Press, he was a freelance entertainment writer for the Allentown Morning Call, The Aquarian Weekly and two.one.five magazine. His dream car is a Tri-Five Chevy.

Mike Principato

Mike has been writing for and about the auto and heavy truck industries long enough to remember when Pontiac actually believed that the Aztek would save their brand and no self-respecting truck stop had a salad bar. He’s lost count of the number of vehicles he’s owned, fixed, reviewed, or conned an unsuspecting manufacturer into letting him drive. His work has appeared internationally everywhere but on your coffee table, and invariably reflects his irrepressibly nerdy fascination with highly engineered machinery of every kind. In Shop Press, his sworn mission is to help readers discover that same magic behind the seemingly mundane.

Mike Apice

Mike has been a long time photojournialist based out of Philadelphia. One day he walked into Dorman Products. They gave him a camera and said, “Shoot this part,” and almost 22 years later he’s still shooting. He’s seen a lot of changes in and around the automotive world, but is still a devoted manual transmission driver. He appreciates the stories each car and each driver has, and enjoys showing those stories in his photography.

Nick D’Alessio

Before coming to Dorman, Nick ran his own shop specializing in high-performance Japanese vehicles which he still owns and operates today. He holds a degree in electrical engineering, and holds certification as a Master Technician through the ASE. He began his career as a field service engineer for Bombardier Transportation working on projects like the SEPTA M4 train and AMTRAK Acela High speed train. Well-versed in fabrication and welding, you can find him performing complex try-ons, building on-vehicle test fixtures or test harnesses, or hosting Dorman product and original content videos.