Many auto repair shops rely on volume-based assumptions, transferring expensive financial risk onto the consumer. When a 2019 Ford Expedition arrived with a cold-start rattle, a typical shop would have just replaced the cam phasers. Instead, The Car Conservatory wanted to think ahead. By inspecting cylinder health, turbochargers, and spark plugs, we uncovered severe internal engine damage. This $567 investigation saved our customer from a $20,000 repair bill.