@thehonestmechanic3: Never do this when your engine is hot—it can cause serious damage and put you at risk. Opening the radiator cap while the engine is still hot releases built-up pressure and boiling coolant, which can lead to expensive repairs if done incorrectly. Always wait for your engine to cool down before opening the cooling system. Follow for simple, honest mechanic tips that can save you money. #cars #carproblems #mechanic #carmaintenance #enginetips