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

What causes brake noise?
Many vehicles today have made the switch to DC brushless fuel pumps. They don’t work like the older brush-type pumps do.
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?
Auto care news and advice you can use.
Can independent repair shops benefit by offering mobile service to an increasingly immobile America?
Which of the following is the most critical result of a rust hole in an exhaust system?
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.
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.
A fluid transfer pump is the cleanest and easiest way to fill a differential, transmission or transfer case with its necessary fluid.
In November 1988, two employees snuck a camera into AMC’s Kenosha plant for a farewell tour.
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?
We’ve all heard the question that starts like this. So will you lend tools?
A playlist of videos from a recent trip to a Dorman contributor’s personal shop.
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.