Why does a car make a ticking sound after being turned off?

Question

Random ticks like: tick.........tick,tick..........tick.....tick.

Answer 1

Because the metal in the exhaust pipes, catalytic converter and exhaust manifold(s) is cooling down and it ticks as it contracts.

Answer 2

I started noticing this as a kid in the 80's. I never had noticed that on the older cars my parents had owned. It was explained to me that many engines today have cast iron blocks and aluminum heads. These 2 metals cool and contract at different rates, and slip like tectonic plates.
But just to be sure, you might want to check your trunk to see if there is a bomb in there ;)

Answer 3

Just the exhaust etc. cooling down and the rest of the engine.
It is perfectly normal.
If you think it is excessive just check to make sure your running engine temp is not too high. If not, don't stress.

Answer 4

That's the sound of metal components, mostly the exhaust system, contracting as they cool down.

Answer 5

once you turn your motor off its the motor vehicle cooling down its each and all of the tin under the motor vehicle like the ehx device and warmth Shields very regularly occurring very stable query tho enlargement and contractions the motor vehicle actualy is warmer once you turn it off reason the temp rises for some seconds then cools down right this moment

Answer 6

Most all cars do that, the engine is just cooling down, that's all!

Answer 7

How about the car is hot and it's cooling down.

Answer 8

because of resonance between engine and body of car

Answer 9

cooling exhaust,catalytic converter