I recently noticed a clicking noise from my engine, so I took it into my garage and ran the engine with the hood up to take a look. Several threads on this forum explain a regular click to be a loose wire connection with the arcing causing the click noise. I looked around everywhere in the engine bay and in the areas shown in this thread:

https://www.rx8club.com/series-i-tech-garage-22/diagnose-me-173476/

and I couldn't find a frayed or disconnected wire. Unfortunately, I can't find the spark plug wiring as demonstrated in that thread.

However, I noticed (and took a video) that a certain section of the engine, which I believe is related to the AC, was causing the clicking noise. Please watch the video to see for yourself.

http://www.youtube.com/watch?v=xyu3vp3_wjA

As far as I can tell, this click is not normal, but I don't know for sure. I've searched the forums with the parameters "AC clicking", "air conditioner clicking", and "engine clicking" and the only results are in loose electrical connections. When I turn off or turn the AC higher, the clicking is gone as the part runs continuously. It's only when I run the AC on level 1 I get the clicking. Can anyone provide some insight?

 

lol. Classic.

Uh, you can actually see the A/C compressor cycling when it clicks in that video.


Its normal. Relax.

 

Awesome, thanks.