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

Let’s review some of the icons and oddballs we’ve featured here so far.
What does “MIN THK.” really mean?
Don’t waste your time with codebreaking. Just grab a paint pen.
Auto care news and advice you can use.
The right tools will expand your capabilities and help you to tackle more advanced jobs, but it’s not always easy to know where to start.
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?
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.
Auto care news and advice you can use.
There are many types of punches. There’s a reason for that.
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.
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.
Nick and Lemmy check out a flex plate from an imported Japanese automatic transmission with very few miles under its belt.