An engine exhibits a knocking noise. During a cylinder power balance test, the noise abates. Which technician has the correct diagnosis?

Almost every vehicle on the road has a longer wiper blade on the driver side. On older vehicles, you’ll also see two of the same size wipers working together. But can you think of any models that have the longer wiper blade on the passenger side?
Let’s review some of the icons and oddballs we’ve featured here so far.
What does “MIN THK.” really mean?
Auto care news and advice you can use.
You can’t sell what you don’t understand.
Smartphones, laptops, and computers are normally cleared of all data before selling or discarding to protect personal information.
How many times have you seen a hub dust cap with ugly dents from a sloppy installation? A dust cap tool is a handy tool for installing caps on customer vehicles without damaging the cap’s appearance.
Do your customers know the benefits of magnetic oil drain plugs? Swap out their standard drain plugs to help protect against unnecessary engine damage.
A customer states the brake pedal falls slightly when the brakes are applied while starting the engine. Which technician response is correct?
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Auto care news and advice you can use.
Want to make your vehicle last? Not sure how to talk to a shop about car repairs? Nick and Lemmy offer their five top recommendations.
A little glimpse into the world of making old parts new.
Inspection of a belt goes beyond the old standbys of checking for cracks and fraying.
On a car with disc brakes, what is the most likely symptom of a vehicle with rotors that measured out-of-spec for thickness variation when measured at several places on the rotor surface?
Peter Meier discusses the importance of testing coolant and how mechanics can use simple strip testers to keep cooling systems safe.
Before you toss those zip tie scraps in the trash, consider saving them for plastic repair jobs. In many cases, the plastic used in zip ties will bond with common automotive plastics with the help of a soldering iron.
Which of the following is LEAST LIKELY to cause an oil leak? Our technicians have the answer.
Spoiler alert: be careful running it through the car wash.