I have a 2022 992 Cab that seems to have developed a very distinct and relatively loud metallic rattle at low RPMs (1,500-2,500 typically). If rev through that range and hold the applicable RPM, the rattle will be continuous and audible from inside the car as well on the outside from perhaps 10-15 ft away. It sounds exactly like a heat shield rattle.

I took the vehicle into my dealer and demonstrated the sound in front of the SA and the tech, both of which agreed it was probably a rock or other obstruction creating a vibration on a heat shield. Turns out, that was not the case. The sound, apparently, is coming from inside the engine itself. Over the course of the next week, the dealer says they have ruled out nearly everything they can think of (valves, turbos, transmission, etc.), but they admit that they “have no idea” what is causing the sound, much less how to fix it. They told me they conferenced with Germany who was equally stumped. The dealer now wants to give the car back to me saying “either it will get worse and will throw a code, or it won’t and you’ll just have to live with it.”

My initial reaction is that this is not an acceptable outcome. It seems to me that if everyone agrees that there is something demonstrably wrong with the vehicle, they need to resolve it. No matter how long it takes. Telling me to just “live with it” seems ridiculous for a vehicle that costs this much. I know that every single time I rev through that RPM range, that sound will irritate me. Any advice on how to proceed? I could email the service manager, but I suspect he won’t have much else to offer. I also don’t want to make enemies of my only Porsche dealer in town. Should I email Porsche directly? Will they just lean on the dealer, who has already indicated they don’t know how to proceed.

Thanks in advance!

 

If you have sport chrono, suspect PADM.
Porsche Service Bulletin 183/21ENU 1035

 

I have the same issue
replaced with new motor mounts and still evident
dealer playing stupid and had the ***** to put it in writing that no vibration and or rattle evident
called the gm let’s see how he wants to proceed
unacceptable at 150k sorry Porsche

 

I do have Sport Chrono but I’m not sure this is the cause, as the noise is reproducible even while not driving. Just rev in neutral and you can hear it. I think this TSB would apply only to the ADMs that active while in motion, right?

 

I believe the engine mounts are defective and the rubber supporting the engine is fatigued and let’s the engine rub against the firewall so yea I believe in neutral will do it too
imo

 

Find the engine mount thread and read
you will get a great understanding
then march in with the tsb.

 

I listened to some of the clips in the engine mount thread and I don’t think that is my issue. Someone mentioned it sounds like “loose lumber rolling around”, which is an accurate description for those videos. My sound (which I will record if I pick up the vehicle) is more metallic and “tinny”. Imagine if you had a license plate loosely bolted to a metal surface and drove over a rough road. Or a thin metal heat shield vibrating against an exhaust muffler. That is my sound. While the ADM sound does seem annoying, this is much more distinct.

 

Motor mounts?

 

Tell them to check the flywheel. Had similar rattle on my 991.2 PDK. They replaced PDK but eventually figured out it was the dual mass flywheel, which apparently have a propensity to rattle at low rpm.

 

Oh my. Mine does a weird sound at 1500, sounds like a grind, only on the passenger side.

 

Might sound crazy but I’d drive it hard and hopefully it gets worse or something gives and they can find and fix it.

I had a car with a flapper deal inside the exhaust to heat the car up quicker, it ran off vacuum and when it broke it sounded like the thing lost a rod bearing. Once it got bad enough to locate it I was able to fix it but at the beginning it was barely a rattle and only at start up when the vacuum was set to close the valve. It was welded to a spindle and the weld had failed from the factory. Didn’t hurt the car one bit but it annoyed me and anyone in the thing.

 

I also have this issue. Between 1500 - 2500 RPM, a sort of higher-pitched metallic noise. Reproduced it with a tech in the car for a drive. Said it's normal, has heard it before and these engines tend to "clink and clank" and it's a non-issue. I'm not sold but the car drives perfectly and pulls hard. So I'm honestly not that worried.

 

Does your State have a Lemon Law? If so, then take it in three times for the same item, and go Lemon Law which will force a buy back from Porsche AG.

 

I had a really good conversation with the GM at the dealership and he explained he didn’t build the car and would work with Porsche to see if they will take the car back. He said one way or another he would take care of me. He said he would call the rep and have an engineer meet with us to go for a ride but later in the day emailed the paperwork has been filed. I think they are going to take it back. The question is will it be a check and see ya or will I get another slot for a build ? Best case get a slot and drive mine until it’s arrived. Who knows but it’s heading in the right direction. I think they want to avoid the expense of the lemon laws.

 

Can you post a video of the noise?