What Causes the Ticking Sound Under the Car After Parking and Turning Off the Engine?

[Ross]

Parking and turning off the engine after driving can sometimes result in a ticking sound coming from under the car. This is usually caused by uneven cooling of the engine. During driving, the internal components of the car reach high temperatures, causing slight thermal expansion and deformation. After the engine is turned off, the heat source is removed, and these components begin to cool down due to the ambient temperature. The ticking sound is likely produced by the contraction of certain parts as they cool, often resembling the sound of dripping water. If the issue is due to uneven engine cooling, try waiting for a short while before turning off the engine after parking. If the ticking sound persists even after this method, it is advisable to have the car checked at a 4S shop.