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 proper system function.

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.
Which of the following is LEAST LIKELY to cause an oil leak? Our technicians have the answer.
Nick and Lemmy check out a flex plate from an imported Japanese automatic transmission with very few miles under its belt.
A defective harmonic balancer can affect the accuracy of ignition timing readings or a defective harmonic balancer can damage the crank. Which technician is correct?
DEF is easy to contaminate, and fortunately, it’s also easy to test. Check to be sure that your customers’ DEF is up to spec with these simple tests.
In this challenge, techs and DIYers get as close as possible to a target final pressure to see who’s got the best skills and strategies at the tire machine.
Which of the following is LEAST LIKELY to require a separate gasket for installation?
Crank fasteners are often a real pain to remove. Mechanics with expensive impact wrenches and large breaker bars struggle to remove them—but there’s a better way.
Under what conditions would the EGR system be expected to be operational? We have the correct answer.
Break out your paint pen—you’re the service writer now!
Do you have a study guide to prepare for your ASE exams? Which parts of that study guide do you use the most? Dorman Training Center instructor Pete Meier explains.