16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHThe Old Exhaust Rattle
Reported or suspected cause
same as what you had, topaz
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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 report identifying a cause
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.
Reported cause · Original poster
I am pretty sure my problem is the same as what you had, Topaz.
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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I have checked all the connections and nothing is loose. I remember seeing a picture, in this forum, of a guy who cut open his muffler and fixed it himself.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Read full discussion summary
Leading evidence: 'same as what you had, topaz' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'same as what you had, topaz' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check connections and nothing is loose' (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
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.
Performed · outcome unconfirmed · Original poster
I have checked all the connections and nothing is loose. I remember seeing a picture, in this forum, of a guy who cut open his muffler and fixed it himself.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Use pc fahrenheit epoxy
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I actually used PC Fahrenheit epoxy to fill in some areas. Mickey mouse but it worked like a charm.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
flow of exhaust
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
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 suspect a cause
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.
Suspected cause · Original poster
It is embarrassing and I don't think the mallet brings out the rattle because the rattle is caused by the flow of exhaust.
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
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.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check connections and nothing is loose
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I have checked all the connections and nothing is loose. I remember seeing a picture, in this forum, of a guy who cut open his muffler and fixed it himself.
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.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 2 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
all is good now after operation, and i haven't noticed any problems since.
I have a rattle in my passenger side muffler. It's not the cat, I am sure. It rattles like hell when the engine is cold but goes away after 10 min of driving (exhaust system gets to max temp, metal expands). I am pretty sure it's a broken weld inside the muffler. I have checked all the connections and nothing is loose.
I remember seeing a picture, in this forum, of a guy who cut open his muffler and fixed it himself. I can't find the darn picture. I was a welder for 12 years so I am confident I can handle the job. I just want to see what side he cut? I am guessing it's the outside (side without mounting bracket). Also I want to see what size window he cut out.
Also I plan to leave the muffler in place and remove the bumper and heat shield. I think I will have great access to the side of the muffler and will be able to do the work no problem. If I am careful and don't cut too deep I shouldn't harm any of the internals. Right??
What do you guys think? Does it sound reasonable? Am I high? LOL.
Also if someone knows where the picture can be found I would appreciate it.
Thank you
Rob
I had a horrible rattle and after hitting in different places with a rubber mallet I found the source. It was a small bracket near one of the tips. It was broken but would expand enough once hot that it would stop rattling.
Have you tried the rubber mallet approach?
I took the tips off, because I thought that was it, but it still rattled. I systematically checked everything around the rattle area, with a mallet, including the muffler and it was inconclusive. I am 95% sure it's inside the muffler.
I wish I could find that old post were the guy cut his muffler open and welded the broken weld. It had a picture of the window he cut out. I think I can get it done without removing the muffler.
I cut my muffler open. It will be a loose post/pillar inside which has come loose. PM me if you need details on how to do it, but take it to a shop if you don't know how.
Make sure you check the other post as well and reinforce it by doing a bit of welding.... all is good now after operation, and i haven't noticed any problems since.
I am pretty sure my problem is the same as what you had, Topaz. I just want to know how big of window you cut out and on what side of the muffler. I am guessing the window was cut out of the center.
Thanks
Yup that's what I went by as well, but my mufflers are a bit different so it depends what 996 you have?
On mine, it had two very thin metal rods as support pillars. I cut on the same side as the logo of the stock mufflers. Just as a pointer,cut where the thin metal is and not where it's thicker (Kinda obvious)
Some people mentioned trading them in and working a deal with FisterD, that could be an option.
I have this same problem now. It is so loud at idle and is embarrassing when I first start up the car. Then when it warms up the problem goes away.
I tried the rubber mallet but still can't place the source of the noise...Ugh!
Once you remove the muffler, shake the whole thing and confirm if something is loose inside first.
My symptoms were basically you could always hear some sort of loose metal inside at idle. It would always be there, and it would make the most noise when I would drive and let of the throttle...
You don't need to cut the whole window out, leave enough attached so that you can just bend the flap over.
You may know this or perhaps how to avoid it.
I welded a broken suspension piece on my 1972 track car while it was attached to the car and burned out the sensor for my HPV1 crankfire ignition. Welding on the car might endanger some of the sensitive electronics on these new 911s.
Removing the muffler will be much quicker and easier than removing the bumper cover and heat shield.
Loosen two clamp bolts and slide the muffler/cat clamp towards the cat.
Remove three mounting nuts (see the studs in the pic) and drop the muffler. (I also take off the wheel but many don't)
That's just what I have. It is embarrassing and I don't think the mallet brings out the rattle because the rattle is caused by the flow of exhaust. That force is completely different and on a different plane than a blow from a mallet to the muffler body. My opinion.
I will let you know how it goes.
I took the right muffler, it's PSE btw, off and started the car. No rattle. Muffler delete is too loud BTW! Sounded cool however. Cut the muffler open and found no broken welds. I put 8 spot welds around each baffle and reinforced the 1/2" braces. Welded the cover back, total pain in the butt! I actually used PC Fahrenheit epoxy to fill in some areas. Mickey mouse but it worked like a charm. I decided to remove the bumper cover to reinstall. I am glad I did. Much easier IMO. I crossed my fingers and started her up. BOOM NO RATTLE!!! Put the cover back on. I noticed that I was below min. on the coolant reservoir so I added a cup. Went for a 20 mile drive. Absolutely no rattle but the blue reservoir cap belched out the unneeded coolant. WTF? Those min. max. lines on the reservoir are bull S. IMO. I took a turkey baster and removed coolant until just above min. Took a 10 mile drive and everything was good
That epoxy is the S btw. Hard as a rock after the drive. I checked.
