JoachimKeulemans

I saw another post about this issue but no cause or solutions, so I post this in a seperate thread ;-)

In my 2018 Panamera 4s Sport Turismo I sometimes hear a noise when shifting from 2nd to 3rd and sporadically when shifting from 4th to 5ft
It's not consistant en rather hard to reproduce, but I was able to catch it on video which I enclosed

It seems to be more frequent with a cold engine, but even when it is on temperature I hear it now and then.

Does anyone have an idea what the cause of this could be?

Looking forward to your replies!

Regards and greetz from the Netherlands
Joachim Keulemans

djdonte

Maybe its me but that video had no sound. Either way, it sounds like the noise you're describing at shift is the blow off/bypass (I forget which one). It gets more pronounced under high throttle and/or PSE activation. The 4S runs about 19-20 pounds of boost so all that pressure needs to be vented for a split second when the throttle closes at a shift point. You may also hear a similar noise when letting off the throttle suddenly.

JoachimKeulemans

Downloaded the avi file from the forum and played it. Sound is there at my end ;-)
I will be playing around with the trottle to see if letting it go suddenly produces the same sound.
Will get back on that....

JoachimKeulemans

Some new findings.
** I can't hear or reproduce the described sound when spontaneous releasing the throttle during acceleration.
** In supersport mode the sound is almost always there when shifting from 2nd to 3rd. RPM is around 3000 when shifting, speed is 40 km/u.

djdonte

Still sounds like turbo noises to me.. do you have Porsche Sport Exhaust? If so it comes on when you activate sport or sport plus mode.

JoachimKeulemans

Yup Sport Exhaust is present in the car

JoachimKeulemans

The must important question for me is, is this sound normal or does it indicate a possible issue??

JoachimKeulemans

Replaced the video in my first post of this thread.
Hope this one has sound and picture.

PandaSPUR

I hear it.. right after the 2 second mark in the video. Sounds like an owl hooting and I don't think I've ever heard my 2023 GTS do that.

Shuga

you could be low on PDK fluid.

jfort

I have an unusual sound during acceleration on my 997.2 turbo. I sprayed some belt conditioner on the belt and it seemed better. So, this weekend I plan on replacing the belt, two pulleys and the tensioner. For the low cost of a spray can try it.

djdonte

I got the video sound to work on my phone and it doesn’t sound like my car between shifts. Not sure what to tell you now. I have kind of a “woosh” between shifts and if it hit it under and overpass or in a tunnel it sounds like air violently bleeding off.

JoachimKeulemans

Fluid and filter of the pdk have been replaced 1000km/600miles ago.
​​​​​​​That didn’t solved it 😕

JoachimKeulemans

I had a sort of squiking sound on my previous Audi RSQ3 as well. Tip for that is using talk- or babypowder on your belt instead of belt conditioner/WD40. That worked for me.

Meinbeast

I have the same exact noise as you described it, its usually from 2 to 3 under load. Sounds like a whoop. I think it sounds cool.

There are no performance issues, vibrations, or concerns I have with it.