A practical approach to auto repair shop management.
Mastering the Numbers
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HOT OFF THE PRESS
Best of Shop Press 2025
What were the most popular posts this year?
Lash is Cash
A tappy valve is a happy valve!
Clean It or Crack It
Why clearing bolt holes of contaminants matters.
ABOUT 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. With interesting stories from around the world, features on creative people and solutions, and all kinds of other stuff that’ll make you use your mind and your hands.
SHOP STUFF
Auto care news and advice you can use.
Cat DTC Diagnosis (P0420) – ASE Practice Question (VIDEO)
Technician A says other codes should be diagnosed before replacing the converter for a P0420 code. Technician B says an upstream exhaust leak can trigger the code. Who is correct?
Hybrid A/C Compressor Oil-ASE Practice Question (VIDEO)
On a hybrid vehicle’s air conditioning system that utilizes a high voltage electrical compressor, can only the oil specified by the vehicle manufacturer be used in the compressor or is PAG oil acceptable for use in an electric vehicle’s compressor?
Troubleshooting a “No A/C Compressor Engagement” Fault
Why a compressor clutch doesn’t engage, and tips to find the cause quickly.
Is the Oil Change Interval in a Vehicle’s Owner’s Manual Always the Right Choice? (VIDEO)
Pete Meier explains how vehicle usage and oil/filter quality should affect your maintenance schedules.
Diesel Engines and Racing
You may be surprised at how diesels have made a name for themselves in motorsports.
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SHOP STUFF
Auto care news and advice you can use.
Politics Ain’t Politic
If you have to have them in the shop, endeavor to make politics polite.
The Folded Paper Era and Beyond: Giorgetto Giugiaro’s Iconic Design Journey
Giorgetto Giugiaro influenced everything from groundbreaking supercars to beloved city vehicles.
Is It Ever Safe to Reuse Torque-to-Yield (TTY) Fasteners? (VIDEO)
Pete Meier explains why these single-use bolts should always be replaced for safety and proper function.
Do You Survey Your Customers, and How?
Customer satisfaction surveys should be clear, concise, and targeted.
Interpreting Compression Tests–ASE Practice Questions (VIDEO)
Technician A completed a compression test, noting high readings suggest an exhaust restriction, while Technician B says the test checks volumetric efficiency.
VIDEOS
SLABs: Slow, Loud, and Bangin’
The unique culture of slab cars.
Decreasing Circuit Resistance – ASE Practice Question (VIDEO)
When the resistance of a circuit is decreased and voltage remains constant, what happens to current?
Colin Chapman: The Philosopher of Motion (Part 2)
This British engineer changed racing forever by making cars lighter, not more powerful.