![]() ![]() My last vehicle had a cracked radiator and leaked engine coolant. These cooling system pressure testers need to be calibrated to the pressure noted on the radiator cap and then are very useful in helping diagnose loss of pressure and thus potential leaks. Coolant systems are pressurized and such tools use this fact to help test for leaks. There are cooling system pressure testers you can get from an auto parts store to check for leaks. Leaks of coolant will severely impact the ability of the radiator to cool itself let alone circulate the coolant. If blockages cannot be removed using this method, it is unlikely the radiator can be fixed and it is best to purchase a new one. Such blockages in the radiator can be remedied by draining all coolant and then flushing the radiator, as well as all connecting hoses, with water. Internal blockages will prevent the coolant from circulating. A simple vacuum or leaf blower can do wonders to clean a dirty radiator. When the radiator stops working you risk destroying the engine irreparably. This prevents the radiator from working properly and can cause issues with overheating. These can be external or internal faults causing blockages.Įxternal issues with radiators are generally the result of too much dirt or similar not allowing airflow around the radiator. This will likely stop or hinder coolant flowing or circulating through the engine.Īnother common cause is there is some sort of blockage in the radiator. The thermostat not operating properly will prevent the values from opening and closing. Knowing the symptoms caused by each part can assist you in identifying why coolant doesn’t circulate.Ĭan a bad thermostat cause coolant not to circulate?Īn issue with the engine’s thermostat is the most common cause of coolant circulation issues leading to overheating. ![]() If one or more of the components fail, then this can cause a series of other issues leading to overheating. There are many components to a vehicle’s cooling system that work to circulate the coolant. How To Make Coolant Circulate? What Causes Coolant Not To Circulate?.
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