Why your car keeps losing coolant and what to do next

Cooling system faults at King Street Motors, West Malling, Kent

If your coolant level keeps dropping, do not ignore it. Learn the most common causes of coolant loss, what checks you can do safely at home, and when to book in with a garage. King Street Motor Services in West Malling helps drivers across Kent diagnose and repair cooling system faults.

If you keep topping up coolant, there is usually an underlying issue. For drivers in West Malling, Maidstone and the surrounding areas, coolant loss is a common winter problem, especially on older vehicles and cars used for short local journeys. At King Street Motor Services, we regularly diagnose cooling system faults before they turn into overheating or engine damage.

Common reasons a car loses coolant

• Small leaks in hoses or clamps: Often leave a faint sweet smell or damp patches.

• Radiator leaks: Corrosion and stone chips can cause slow leaks.

• Water pump issues: A worn seal can leak, sometimes only when the engine is running.

• Heater matrix leaks: Can cause misty windows, damp carpets, or a sweet smell inside the cabin.

• Head gasket problems: Less common, but serious, often linked to overheating and pressure in the system.

Safe checks you can do at home

• Check the coolant level when the engine is cold.

• Look for wet patches under the front of the car after parking.

• Check for white residue around hose joints and the radiator.

• Watch the temperature gauge, and stop if it rises unusually.

• Never open the coolant cap when the engine is hot.

FAQs:

• Is it safe to drive if my coolant is low?
  It depends. If the level is below minimum or the temperature rises, do not drive, as overheating can cause serious engine damage.

• Why does my car lose coolant but there is no leak?
  Some leaks only occur when the system is hot and pressurised. A heater matrix issue or head gasket fault can also cause coolant loss without obvious puddles.

• Can low coolant cause the heater to blow cold air?
  Yes, low coolant can reduce heat through the heater matrix, especially at idle.

• How often should I check coolant levels?
  Monthly, and before longer trips. In winter, check more often if you have had to top up recently.

• Can you pressure test the cooling system?
  Yes, we can pressure test to locate leaks and advise on the right repair.

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We’re here to keep you safe on the roads of West Malling and Kent. Call 01732 843135 or email jjautoskentltd@gmail.com for expert advice and repairs.