Ticking sound?

[TedMichon]

Today we noticed a faint but clear 1 Hz ticking sound coming from the interior back that stopped when we started the car and did not immediately resume when we shut down again. Anyone familiar with this?

 

[iletric]

1 Hz ticking sound is infrasound you cannot hear. Bottom audible range is 20 Hz. Human ability maxes out at 20 to 20,000 Hz.

 

[user 744]

I suspect that he means a one-per-second tick, not a 1Hz tone.

 

[Pigwich]

I swear I used to hear bubbles in the battery coolant lines....

 

[iletric]

I swear I used to hear bubbles in the battery coolant lines....

Dang!

 

[dan2112]

Expanding body panels? Are you coming out into the sun from a shaded area?
I noticed a slight ticking sound, but it sounded like the roof ticking like it was heating up in the direct sunlight and it went away after a few minutes of driving.

 

[user 1034]

I've heard it too. It's definitely mechanical. I suspect it is a coolant system thing.

Since I've disabled the noisemaker (don't lecture me please) I can hear a bunch of noises this car makes while "on" but not moving. A little mechanical symphony.

 

[Pigwich]

Maybe it's the valve lifters - Those things are the worst!

 

[SeanNelson]

Maybe it's the valve lifters - Those things are the worst!

Yeah, those valves make quite a clattering sound as they pinch and release the wires running to the motor...

 

[Pigwich]

Yeah, those valves make quite a clattering sound as they pinch and release the wires running to the motor...

I always thought of it more as a stroking, milking, peristaltic kind of motion... but that's just me.

 

[SeanNelson]

...peristaltic...

I just learned a new word!

 

[iletric]

I always thought of it more as a stroking, milking, peristaltic kind of motion...

Sexeee!

 

[NeilBlanchard]

A small stone stuck in a tire tread?

 

[iletric]

That would be 500 Hz, not 1.