What to Do When the Engine Coolant Doesn't Circulate?
2 Answers
Fill the radiator with water and secure the radiator cap. Pinch the return hose halfway with one hand while revving the throttle with the other hand.
When my car's engine coolant isn't circulating, I need to be extremely careful because continuing to drive could lead to overheating and engine seizure. Common causes include insufficient coolant - I'll pop the hood to check the reservoir level and top up with antifreeze if low; a faulty or non-functioning water pump (abnormal sounds or no temperature change in hoses can indicate this); a stuck thermostat that won't open; clogged or leaking pipes (like aged/cracked hoses); or a blocked radiator. If the temperature gauge spikes while driving, I'll immediately pull over, turn off the engine, and set the heater to maximum to aid cooling - never push a overheating engine. Safety first - I typically contact a repair shop for comprehensive inspection and part replacements. Regular maintenance is crucial: check the cooling system and antifreeze concentration every six months to prevent clogs and corrosion.