Hear multiple taps in engine compartment after shutting down

What is your question?

I drive the car for 5-10 minutes and when I turn off the engine and wait 1-2 minutes I start hearing taps or ticks from the engine compartment (multiple taps separated by 20-40 seconds). Sounds like metal pieces cooling down and hitting each other. Can that be bolts in engine block which were strechted from engine heat? It happens every time after turning the car off.