Dorman Products

Are you adding engine oil the wrong way?

Simple exhaust leak test for diagnosing a P0420 trouble code

“Show and tell” | Tips from mechanics #automobile #carrepair #truckrepair #autorepairtips

Most important things to check after hitting a bad pothole

Wiring diagrams are your road map to electrical troubleshooting

Beyond the basics: best tools for auto repair DIYers and technicians

“Upselling” doesn’t help you or us | Tips from mechanics #automobile #autorepair #upselliing

What an oscilloscope shows that your DVOM can’t

Your owner’s manual is gospel | Tips from mechanics

One-step trick to stop cracks from spreading on parts

What is pulse width modulation? How does PWM work?

Why testing modern sealed batteries takes more than hydrometers and refractometers

Top tips for car and truck fleet maintenance: what repair shops need to know

Cast manifolds vs. headers: Which is best for performance?

Five best car and truck tips from mechanics to non-mechanics