What causes coolant overflow when engine temperature is not high?

1 Answers
CarsonRose
07/29/25 9:34pm
The reasons for coolant overflow when engine temperature is not high are: 1. Uneven cylinder head surface; 2. Insufficient tightening torque of cylinder head bolts or failure to compress the gasket due to bolt elongation/deformation; 3. Sand holes or cavitation defects in water passages adjacent to combustion chambers in cylinder block or head, causing leaks. The engine's function is: to convert gasoline's thermal energy into mechanical energy by burning and expanding gas in sealed cylinders to push pistons. Engine maintenance methods include: 1. Using qualified engine oil; 2. Using qualified coolant/antifreeze; 3. Regular radiator descaling; 4. Regular engine carbon deposit cleaning; 5. Periodic replacement of three automotive filters; 6. Maintaining proper RPM range.
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