10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHThe 'Repair Cascade'
Reported or suspected cause
failure number 1
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
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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
So failure number 3 was caused by Failure number 1.
Leading evidence: 'failure number 1' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'failure number 1' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check around i find' (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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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
The oil fill tube goes in ok but they installed a vacuum leak that I didn't notice until the next day.
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 · Original poster
Checking around I find that there is a split on the bottom of the filler tube causing a vacuum leak...
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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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
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
If you have to do all that, you're practically at the point of replacing the AOS with the UAOS...
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Suggestion · Original poster
After removing it, I realize that it must have been hit by the belt or pulley when the pulley failed, and I didn't notice when I was replacing the pulley.
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.
10 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 · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T120458Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
A somewhat humorous take on what every mechanic finds from time to time... Not just on 996s, but on every car. The 'Repair Cascade'
A few weeks ago, I had a bearing failure on the top Idler Pulley on the way home from work. I am driving home, and hear this rattle-clank-sqeal, and so pull off and have a look.
Bearing Failure on top Idler pulley, the pulley is angled now and jammed on the bearing race, and has thrown the belt. (Failure #1..)
After removing the pulley and ordering a new one, I realize that the belt was somewhat shredded. Failure number 2, caused by failure number 1
Order a new belt.
Install pulley and belt.
Next day happy to have my 911 again, I go out for a long drive..... or so I think. About 20 miles in.... Low coolant light, and almost immediately temps rising.
Pull off, and the little hose behind the idler pulleys has split. (Failure #3)
After removing it, I realize that it must have been hit by the belt or pulley when the pulley failed, and I didn't notice when I was replacing the pulley. So failure number 3 was caused by Failure number 1.
Replace the hose and clamps.
Go out for a drive...... Find that the idle is super high.. it is like 1800rpm.. Can't figure out why. (failure #4)
Checking around I find that there is a split on the bottom of the filler tube causing a vacuum leak... which obviously happened because I had pulled it up and out of the way the last few times, working on the pulley and hoses behind it...
So Failure number 4 was caused by Failure number 1.....
Now I am waiting for a new filler tube... What is next?
lol
What is your 'favorite' cascade?
Eliminate the possible failure of the plastic coolant hose connector in the future (it will happen again). Get the Rausch & Spiegel stainless steel/aluminum upgrade. You can get it at Pelican Parts.
That sounds terrible.
My Touareg was an absolute monster was lift� I�ll spare you guys the details but my soul hurts from the giant pile of crap that cascaded from that.
Bad luck!
I had read on several occasions that someone doing preventative maintenance led to other issues. So no good deed goes unpunished even when there isn�t always a failure.
But look at it this way, the coolant connector and the filler tube both get brittle with age. They would have failed on their own eventually. This way, you shouldn't have to worry about these items for quite a while.
Now, if you remove the alternator and/or throttle body to get to the oil fill tube bolts, be prepared to break some very brittle vacuum lines.
There is also the corrugated crossover vent tube, just behind the full tube, which gets very brittle; mine had a crack in it.
If you have to do all that, you're practically at the point of replacing the AOS with the UAOS...
Good luck!
100% what DBjoe996 said. Get the R&S connector and NOT the URO or Porsche part. The R&S part is much better made. I had the URO fail on me during installation. The R&S connector is 100% sturdier and a better design. It was a cascade replacing that part because while I was in there I noticed a hose that belonged connected to the intake plenum had been hanging out for...years?
For me, every maintenance task also involves removing 23 years of brake dust and road grime. You don't have to be a masochist to own a Porsche, but.....
I took my car in and left it for an oil change. No big deal. They call me to sell an air filter. "Sure"", I said. They call me later to tell me the bellows in the oil fill tube broke. Groan. After a bit of deliberation about taping it (thier suggestion) or fixing it, "Fix it", I said. The oil fill tube goes in ok but they installed a vacuum leak that I didn't notice until the next day. Back to the shop for another day of fun. It got resolved ok but I was without my car longer than expected.
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