What Causes the Ticking Sound After Engine Shutdown?

[VanJade]

It is normal to hear a ticking sound after the car is turned off, and there is no need to worry too much. Here is the relevant information: 1. Most likely cause: The ticking sound occurs because the engine temperature rises correspondingly after continuous high RPM operation, making the engine very hot. After stopping, the cylinder block temperature decreases unevenly, causing cooling contraction between metal joints. The ticking sound is the friction noise between metals, which is especially noticeable in older vehicles. 2. Solution: If the ticking sound disappears after waiting for a while before shutting off the engine, it indicates that the sound is caused by friction between some metal components in the engine due to cooling contraction. For turbocharged engines, it could also be the sound of the turbo cooling down, which is the noise of metal expanding and contracting with heat.