Golf 4 TDI: Strange Noise When Engine Stops

Hello.

I'm having another problem with my car.

When I turn off the engine, I hear this strange gurgling sound, as if air is still escaping from somewhere in the engine.

Does anyone recognize this? If so, what could it be?

Sure, here is the translation of the text from German to English:

"MFG" stands for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English. It is a common way to end a formal letter or email.

Yep, we just had that issue. It was about a refrigerant leak in the air conditioning system. Try using the search function; it was an A3 with ASZ, but I don't remember the exact details. It might have been about three weeks ago.

Hello.

Okay, I found it.

"However, it's not as he describes; for me, it happens even when the air conditioning is off, regardless of the temperature."

Hi,

Perhaps it's the sound of the shut-off valve opening shortly after the engine stops? Just observe what happens when you turn off the engine; maybe you can associate the movement of the shut-off valve (which you can see through the pneumatic lever connected to it) with the noise.

Best regards,

January.

Hello.

"Is that the valve located on top of the intake manifold, where the vacuum sensor is connected?"

Sure, here is the translation of the text from German to English:

"MFG" stands for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English. It is a common way to end a formal letter or email.

Hi,

Yes.

"Mine makes a noise when I put it down, which might be what you're describing. Try this: open the lid and have someone place it down while you observe."

Best regards,

January.

Hello.

Okay, thanks. I'll try it out sometime if it turns out to be the cause. If that's the case, what can be done?

Sure, here is the translation of the text from German to English:

"MFG" stands for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English. It is a common way to end a formal letter or email.

Hi,

Why should one? If it's the noise I'm thinking of, then it doesn't bother me at all.

Best regards,

January.