How to Determine if an Engine is Seized?

[Leroy]

When an engine seizes, the overheated and expanded piston will violently rub against the cylinder block, generating abnormal engine noises. Engine vibration becomes extremely noticeable, and in severe cases, black smoke may emerge. Due to increased movement resistance, the pressure inside the engine cylinders becomes significantly higher, which can easily lead to engine overheating.

[DiJayla]

Last time I went on a road trip with friends, I almost experienced engine seizure. The main symptom is suddenly hearing extremely loud metal clanking noises from the engine, like someone hammering on a metal bucket. At this point, the car will noticeably lose power dramatically, and stepping hard on the gas pedal won't help. The exhaust pipe might emit large amounts of blue or white smoke. The hood will feel frighteningly hot to the touch, and in severe cases, you might even see engine oil leaking out. Under no circumstances should you push through and keep driving—shut off the engine immediately and call for a tow truck. If you actually suffer engine seizure, the engine is basically ruined, and the repair costs could be half the price of a used car. Always pay attention to oil levels and coolant temperature during regular maintenance.