22 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTransmission Rattling Noise
Reported or suspected cause
heatshields
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
1
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Reported cause
My oem exhaust had crazy annoying rattle, turned out to be the heatshields.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I thought it was a heat shield or loose exhaust hangar..etc but we tightened everything up, double checked the heat shields and can't find anything to make that sound so I'm wondering if something else is going wrong back there.
Leading evidence: 'heatshields' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'heatshields' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check heat shields and can't find anything' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
Swapped for a Kline no more rattle for me, and great engine sound instead
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
The throw out bearing was replaced but the noise is still there.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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Suggestion
I thought it was a heat shield or loose exhaust hangar..etc but we tightened everything up, double checked the heat shields and can't find anything to make that sound so I'm wondering if something else is going wrong back there.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check heat shields and can't find anything
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I thought it was a heat shield or loose exhaust hangar..etc but we tightened everything up, double checked the heat shields and can't find anything to make that sound so I'm wondering if something else is going wrong back there.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
22 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
6SpeedOnline: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T142254Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello,
I have previously posted a concern in regards to the rattling noise in the transmission. I've contacted Porsche and the field representative said it's normal. I am not 100% satisfied since I do feel that something is wrong.
If you have time, could you please take a look at the video clip below and let me know if your car makes the same noise (or if you know what the problem is). The throw out bearing was replaced but the noise is still there. The noise is NOT there when the car is cold (eg: first start in the morning).
Thank you!
http://www.tuningemotion.com/MOV00069.MPG
Hi All,
I'm been trying to find the source of an extremely annoying "rattle" coming from the rear end of my car (2008 TT).
Here's a vid:
Porsche 997 turbo rattle - YouTube
There are two separate issues but I believe they're related.
When the car is stone, dead cold, at startup it makes a godawful rattle. The rattle is not uniform and changes intensity and pitch through warm up.
Once the air injection shuts off and the idle settles in, the rattle goes away.
You can see this in the video at the 1:53 mark.
When the car is warm...even 5-6 hours after being shutoff and restarted...the startup rattle is non-existent.
I thought it was a heat shield or loose exhaust hangar..etc but we tightened everything up, double checked the heat shields and can't find anything to make that sound so I'm wondering if something else is going wrong back there.
The other sound is heard in the video around the 2:06 mark. This is a rattle/fart sound that only occurs when the engine is off idle to ~ 1.2k rpm. I've blipped the throttle to around 2k rpm so you can hear to sound off idle..then die out...then come back as the rpms drop back below 1.2k and then go away at idle. This sound is persistent whether the car is cold/warm/hot.
I do have a catless, 3" xpipe exhaust (that I love the sound of) but this sound was not present immediately after it was installed. It started happening a week or two after the install and was subtle at first but has gotten progressively louder. I'm not ruling out that there's an issue with the exhaust but after spending way to much time sniffing fumes down there...it just doesn't sound like it's coming from the actual exhaust.
Not sure if anyone has any ideas. Could it be an exhaust leak or something worse going on? The car drives great, pulls strong, and doesn't have any driveability issues whatsoever.
But that sound....
Thanks All!
Tom
When did the noise start? After an exhaust install? Sounds like some type of resonance at certain RPM's you can hear the bumper/something buzzing and vibrating. Have you had the bumper off recently? Intercooler ducting not rattling/rubbing on something? Loose bolt rattling inside or I think you mentioned driving it. Would have tumbled out by now :/
Nope. I am using the stock flywheel!
I should also mention that the car is making quite a bit of backlash (or whatever you call it). For example, if you let off the gas at around 2000RPM, you can hear a 'thump' noise from the rear end. Weird!
That sound is the dual mass flywheel (at idle ) some rattle,
some don't, according to a master Porsche tech. not serious,
at least thats what I was told.
Hoping it's not internal to the exhaust but that's certainly a possibility. I'm going to take the bumper off again and give everything another examination. It really does sound like a loose strap or heat shield but I just haven't found it yet and since no one has said "oh yeah...that definitely sounds like your flux capacitor is going bad" I'm hoping I'll find that I just missed something simple.
Quote:
I have a 2009 997.2 c2 pdk making a rumbling sound at 1300 rpm when warm, under light acceleration Not there under heavier acceleration everything serviced and updated (PDK, MOUNTS ...) I have adapted to brisk acceleration once car is warmed never looked back
A thump from the rear end sounds like motor mounts. The hydro motor mount fail and leak and become flobbery. The other thump is from the gearbox mount. Mine had failed and was causing that thump which then translates into the motor mounts failing much quicker as well. I use the Flat6 Cup mounts on my car and left the hydraulic ones behind. The video link did not work for me, btw.
I'm with Rix.
The exhaust system of a stock Turbo is a pretty snug fitting assembly with not much spare room between things. Any change to the exhaust system is just an opportunity for introducing a rattle, or buzz, or other noise.
That's exhaust system related. An exhaust hanger connection is loose, broken, there's something loose in the exhaust, or possibly a heat shield is loose or touching something.
Time to sniff some more exhaust fumes.
Take the bumper off, start the car while it's rattling and start grabbing stuff. You'll figure out where it is pretty quick when whatever you grab stops the rattle. Wear some gloves, things get hot quick
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Quote:
Yes! It ended up being the water pump in my case.
The impeller shaft had worn and caused things in the pump to start making physical contact with one another causing that rattle. It was all chewed up inside. New pump and noise went away.
Here's the noise from mine. It's quite similar to yours goes on for about a minute and a half when cold and then disappears. I've started hearing it also low speeds when warm and driving. Is this what you experienced? Here's my video. Thanks
You Tube
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