An old axiom reminds us that an ounce of prevention is worth a pound of cure. Here's how top technicians apply that sentiment to routine air filter replacements.
The savvier techs I work with employ a simple but effective procedure that prevents dirt from entering the air inlet system during a common air filter job.
It entails two steps that, at worst, may add a minute or two to the entire service.
First, clean the outside of the air filter housing (often called the filter box).
Then clean the interior of the filter box, including its sealing surfaces.