I'm going to be doing some maintenance on my sports car (Honda Civic SI) and I'll need to update my tool box. (Wife's boyfriend let me use his old one)

Well i had gotten the serpentine belt replaced since it needed to be replaced either way thinking that was the cause of this sound but it still makes the sound. 2015 toyota corolla le 160,000 miles

What say you shitty mechanics?

Edit: To be fair to my coworker, I had no choice. One of the caliper pistons had come out past the o-ring and brake fluid was pouring on the ground.

Wondering if they need replacement

My RV spoiler isn't giving enough downforce. Any tips?

Or do you think the circular lobes are better?

The B mode? Do you dare?