What Causes the Gurgling Sound in a Car's Radiator?

[CarlosDella]

Most of the time, the gurgling sound in a car's radiator is caused by insufficient coolant in the vehicle's radiator. The specific reasons and solutions are as follows: Insufficient Coolant in the Radiator: When there is not enough coolant in the engine, it leads to excessively high temperatures and the presence of air inside, causing the phenomenon of 'boiling over.' This is why you hear a gurgling sound when the car stops. Solution: After venting the air from the engine, add antifreeze. Blown Cylinder Head Gasket: The cylinder head gasket under the cylinder head is blown open by high-temperature and high-pressure mixed gases. If this opening connects to the cooling water passage of the cylinder block, it continuously pumps air into the radiator during the operation of the connecting rod and piston system, producing a noticeable abnormal sound. Solution: Drive the car to a 4S shop for repair or replacement of the cylinder head gasket.