When a mechanic has no ability to troubleshoot a problem. Instead shoots the "parts
cannon" at the problem. He ends up replacing every component in the
system in hopes of fixing
whatever was causing the problem. A complete waste of material and labor.
Customer: My breaks are squeaking.
Dumb Mechanic: You need new brake calipers, pads, rotors and wheel bearings.
FIRE THE PARTS
CANNON!