3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2001 Boxster S howling noise
Leading reported evidence
Fill /evap area you will see where they are located
Suggestion or failed attempt
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 contain suggestions
1
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Suggestion
If you look at a diagram of the gas fill/evap area you will see where they are located.
Leading evidence: 'Fill /evap area you will see where they are located' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill /evap area you will see where they are located' (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.
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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
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Suggestion · Original poster
I have two new axles, replaced tranny fluid, rotated tires, tried my spare to determine if sound changed (sound did not change).
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.
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Suggestion · Original poster
I guess next attempt would be to change rear wheel bearings.
Replace tranny fluid, rotated tires, tried my spare
Suggestion or failed attempt
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 contain suggestions
1
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Suggestion · Original poster
I have two new axles, replaced tranny fluid, rotated tires, tried my spare to determine if sound changed (sound did not change).
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
If you can take your car someplace that you can put it on a lift to run the motor and trans through the gears, it may help you determine if it something other than the tires.
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.
3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My 2001 Boxster S has over time developed a loud (from inside cockpit anyhow) howling noise that seems to be coming from the rear of both sides of the car. It really sounds like tire noise, (I have Michelin Pilot Sports) but the sound does not change on different asphalt surfaces. I have two new axles, replaced tranny fluid, rotated tires, tried my spare to determine if sound changed (sound did not change). Transmission works great. When I drained tranny fluid it looked okay. I put a magnet through fluid and have no filings. Maybe the Boxster rear end is supposed to be loud and I am just getting old and irritable! I guess next attempt would be to change rear wheel bearings. Note when I rotate the wheels while on jack stands with wheels off, both sides sound the same and don't imply the wheel bearings are suspect.
Minor detail......"... it's a 6 speed standard. Sound is same in all six gears and with clutch in.
Any ideas?
Noises are always hard to identify through a forum. How many miles on the Pilots? If the tires are starting to feather even slightly, they can really be loud regardless of surface. If you can take your car someplace that you can put it on a lift to run the motor and trans through the gears, it may help you determine if it something other than the tires. Or, if you know someone with a Boxster that would be willing to swap rear tires for a quick test ride.
You are already did what i would have done, only option would be to continue process of elimination.
It may be coming from the gas fill area. There are two valves in the evap/charcoal cannister system that can go bad. They went out in my Boxster and it sounded like a howling/trumpet sound, came and went, RPM did not matter, and one time even did it at idle. If you look at a diagram of the gas fill/evap area you will see where they are located. Not are hard fix. Just a pain to get to. Hope this helps.
http://dcauto.gotdns.com/illustration/index/2701906
This is a source reference. Confirm exact model applicability in the original material.
