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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,...

Hybrid A/C Compressor Oil-ASE Practice Question (VIDEO)

Description Technician A is working on a hybrid vehicle’s air conditioning system that utilizes a high voltage electrical compressor. Technician B says that only the oil specified by the vehicle manufacturer should be used in the compressor. Technician A says PAG oil...

Troubleshooting a “No A/C Compressor Engagement” Fault

As the weather warms, more and more of your customers will be switching over their HVAC control settings to “max A/C”. If the system doesn’t respond by blowing that refreshing cool air into their faces, they will show up at your door to find out why. When faced with...

Diesel Engines and Racing

Nearly every conceivable version of the internal combustion engine has made its way to the Indy 500. But it was a 1931 entry of a rather unusual type that made it into the record books as the first to complete the entire 500-mile race without a pit stop. That entry...

Mastering the Numbers

Mastering the Numbers

Running an auto repair shop is about more than just fixing cars. While providing top-notch service is essential, managing a truly successful business also depends on understanding and acting on the financial barometers of the operation. One of the most important of...
Don’t Overlook This Step When Servicing Brakes (VIDEO)

Don’t Overlook This Step When Servicing Brakes (VIDEO)

Don’t Overlook This Step When Servicing Brakes (VIDEO) Description A brake service job isn’t complete unless the reservoir cap’s diaphragm has been pushed back into place. This simple step is easy to forget, but it helps to reduce brake fluid contamination and ensure...
“Can you drive a stick?”

“Can you drive a stick?”

Well, if you clicked on the title you have an answer to that question, I’m sure, and probably have an opinion on it. As the automatic transmission ascends to complete ubiquity, I would be curious to know what ratio of techs and writers in your shops can row their own...