16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHEngine noise - winning - what do you think (video) ?
Leading reported evidence
Check of my pulleys
Performed · outcome unconfirmed
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Performed · outcome unconfirmed
I had my serpentine belt off yesterday and checked all of my pulleys for freedom, play, and sound.
Engine noise - winning - what do you think (video) ?
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Leading evidence: 'Check of my pulleys' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check alternator' (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.
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Performed · outcome unconfirmed · Original poster
but now that you mention the Alternator, I have to say that I just replaced my battery two days ago because it kept draining, it was already 5 years old so i decided to simply switch to a new one without testing the alternator...
Engine noise - winning - what do you think (video) ?
Replace oil filter
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Performed · outcome unconfirmed · Original poster
Yesterday I changed my oil filter for my usual check and I forgot to add the .5 quart before restarting it.
Engine noise - winning - what do you think (video) ?
Check alternator
Suggestion or failed attempt
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Suggestion
Then again, did you check the alternator to make sure its full?
Engine noise - winning - what do you think (video) ?
Check alternator bearings and the sprag clutch
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Suggestion
The way it winds down slower then the engine I would check the alternator bearings and the sprag clutch on the alternator.
Engine noise - winning - what do you think (video) ?
Replace battery two days ago
No successful repair reported for this finding.
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Performed · outcome unconfirmed · Original poster
but now that you mention the Alternator, I have to say that I just replaced my battery two days ago because it kept draining, it was already 5 years old so i decided to simply switch to a new one without testing the alternator...
Engine noise - winning - what do you think (video) ?
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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
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T083035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Yesterday I changed my oil filter for my usual check and I forgot to add the .5 quart before restarting it. I heard the engine tick a bit too much so I poured oil while the engine was running, I thought it only needed a little bit oil.
I did not drive the car that day as it is on jack stand. I waited for the engine to cool down to check the oil level but I had to leave so did not restart that day
This morning, I check the dipstick and the oil is right in the middle, it is 90F down here in Miami. Engine was 'cold'.
The car is still on jack stand, and I proceed to start the engine to see how it sound and I get a new/weird winning noise now. Sounds like some kind of supercharger high pitch wining. Sounds like something is rubbing while spinning. I don't know what. Check the video, the sounds is exactly the way it sounds.
porsche 996 engine wine at cold start after oil filter change - YouTube
Can you guy let me know what you think ? I did have time to investigate, so I'll check tomorrow if something look out of place but that wining is definitely new.
The way it winds down slower then the engine I would check the alternator bearings and the sprag clutch on the alternator. ( If the car has a 6 speed. If auto no sprag)
http://en.wikipedia.org/wiki/Sprag_clutch
You could remove the serp belt and start it - very briefly - to see if the sound is present. If it is, you know it's coming from the motor. If it isn't, you can diagnose which accessory is producing the sound.
of course today the noise is gone....
2013 10 24 15 33 23 - YouTube
but now that you mention the Alternator, I have to say that I just replaced my battery two days ago because it kept draining, it was already 5 years old so i decided to simply switch to a new one without testing the alternator... the thing might be show, I may go to autozone tomorrow to have it tested.
ok I have a video of the alternator when I turn it by hand, I don't know what is the proper behavior.. is that normal for the pulley to spin when I stop it abruptly ?
see video below:
2013 10 25 14 51 02 - alternator spinning - YouTube
here is also a video of the engine running without the belt, no noise but I did not dare pushing it mush without the belt, too worried:
2013 10 25 14 52 31 - no belt - YouTube
From the earlier posts when you revved higher, it sounds like what a couple of others have suggested - that one of the freewheeling accessories is making the noise.
If this was my car, my next step would be to use a cordless drill to spin up the A/C and alternator to speed to see if the whining happens when it slows. However, I recognize that I have several generations of hillbilly blood, so any solution that involves any combination of electricity, bailing wire, and flame appeals to me.
I had my serpentine belt off yesterday and checked all of my pulleys for freedom, play, and sound. No sounds what so ever came from any . I heard a couple of yours making noise. The first two that you tested. The Alternator and the one to the right of it. Either one, or both of those could be the culprit.
