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What Causes Engine Coolant Overflow?

1 Answers

Samantha

07/25/25 5:08pm

Engine coolant overflow is caused by a blown cylinder head gasket (in wet cylinder liners) or large sand holes/cracks in the cylinder liner or cylinder head. Engine coolant overflow: Engine coolant overflow refers to the phenomenon where coolant sprays or gushes out from the radiator or expansion tank filler opening during engine operation or immediately after shutdown. Pressure-related causes: This occurs when a blown cylinder head gasket (in wet cylinder liners) or large sand holes/cracks exist in the cylinder liner or cylinder head. During engine operation, the pressure of compressed air or combustion gases in the cylinders exceeds the pressure of coolant in the cooling passages. These gases are forced into the engine's cooling passages through the damaged cylinder head gasket or large sand holes/cracks in the cylinder liner/head. This pressurized gas then forces the coolant to spray or gush out from the radiator (expansion tank) filler opening.

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Should Car Anti-Fog Spray Be Applied Inside or Outside?

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