A circulating car “hack” advising drivers to partially open their hoods to cool engines is gaining traction, but lacks evidence of effectiveness and presents significant safety concerns. Drivers are reportedly leaving their vehicles unlocked with only the safety lock engaged while the hood is slightly raised. Automotive experts caution this practice does not demonstrably cool engines and creates opportunities for theft and potential accidents. The partially open hood can obstruct visibility for other drivers and pedestrians, increasing the risk of collisions. Furthermore, unsecured hoods can unexpectedly fall, causing damage or injury. Authorities advise against this method, emphasizing potential dangers outweigh any perceived benefits. Drivers seeking to manage engine temperature should rely on manufacturer-recommended procedures and professional assistance.