Heating and Cooling
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Heating and Cooling - FAQ
Most manufacturers recommend flushing the cooling system every 2-3 years or 30,000-60,000 miles. Fresh coolant prevents corrosion, lubricates the water pump, and maintains proper freeze and boil-over protection.
Common signs include coolant leaking from the weep hole, engine overheating, a whining noise from the pump area, and visible rust or corrosion on the pump housing. Replace the water pump immediately if these symptoms appear.
Use the coolant type specified in your vehicle manual - typically OAT (Organic Acid Technology) for modern vehicles or IAT (Inorganic Acid Technology) for older models. Mixing coolant types can cause chemical reactions that damage cooling system components.
The thermostat remains closed when the engine is cold, allowing it to warm up quickly. Once the coolant reaches operating temperature, the thermostat opens to circulate coolant through the radiator. A stuck thermostat can cause overheating or poor fuel economy.
Common causes include corrosion from old coolant, physical damage from debris, excessive pressure from overheating, and age-related plastic degradation. Regular maintenance and using the correct coolant mixture can extend radiator life significantly.
