Why Does the Engine Temperature Rise After Replacing Coolant?

[ValeriaAnn]

The engine temperature rising after replacing coolant is usually caused by incomplete air bleeding during the antifreeze replacement. Precautions for coolant replacement are as follows: 1. Don't neglect maintenance: Some engines use long-life coolant. After operating for a period, the radiator cap should be opened for inspection. When scale, rust, or sediment appears in the radiator, the coolant should be replaced promptly. 2. Don't open the radiator cap abruptly when the engine "boils over": When "boiling over" occurs, the temperature inside the radiator is extremely high (at least 100°C) with significant pressure. Suddenly opening the cap may cause boiling water and steam to spray out violently, potentially scalding the person adding coolant. During "boiling over," the engine should generally idle until the temperature drops before opening the cap to add coolant. The coolant should be added slowly, not too quickly. 3. Avoid spilling water on the engine when adding coolant: Spilling water on the spark plug wells, high-voltage wire sockets, or distributor may affect ignition; water splashing on drive belts could cause slipping; and water on the engine block may lead to deformation or even cracks.