2001 AWM, fluttering sound?

All the time? (startup, cold, hot, etc)

All the time. Kind of sounds like something plastic opening and closing.

Made a video this morning. It's hard to hear over the engine noise, but if you listen carefully it is there. I ran it through premier and audition to pull some of the higher frequencies out so it is easier to hear. Might have to listen a few times to catch it.

Bump.

It almost sounds like a plastic valve opening and closing every second or so.

Open the hood and have a look see. Use a screw driver or a stethoscope ($10 at any auto parts store or $5 at HF) to find the source.

Try posting your video without messing with the sound and with the hood open. Most members are know exactly what the engine sounds should be and what a lot of the odd sounds are. By manipulating the sound you may be making it harder for people to help. Just a thought.

It is a clicking type of sound by any chance?

I was going to suggest DV, but if it's happening constantly that's a new one for me. Easy enough to test though...

2002GLXV6 said:

Use a screw driver or a stethoscope ($10 at any auto parts store or $5 at HF) to find the source.

Click to expand...

Just bought a stethoscope from HF for $3. But when the engine is running how would you use it? It seems too noisy.

Is it coming from the airbox?

It's coming from that area.

Update.

Since I got the headgasket replaced the sound is gone.