Every Mechanic Fears this Chain

What happens when an engine timing chain physically stretches out?! 🚀⚙️
Inside modern engines, a heavy-duty steel timing chain is responsible for keeping the internal pistons and valves in perfect mechanical synchronization! Over thousands of miles of driving, extreme heat and friction can cause the metal links of the chain to physically stretch. When this happens, the engine will develop a loud "death rattle" or ticking noise. If ignored, the loose chain will eventually skip a gear, causing the pistons to violently smash into the valves and destroying the engine!
In this terrifying diagnostic video, the mechanic removes the front timing cover to expose the internal gears! Using a metal pry bar, they push against the heavy-duty chain, revealing a massive, dangerous amount of slack! Finally, they hang the old chain directly next to a brand-new one, proving that the metal links have physically stretched out over time! This is why routine maintenance and oil changes are critical for engine survival!