9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHWhistling noise when the engine is warm.
Leading reported evidence
Disconnect + power
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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1
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Suggestion
To troubleshoot, disconnect all + power to the amp, see if alt whine subsides.
Leading evidence: 'Disconnect + power' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect + power' (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.
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9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Hi guys,
I have a whistling noise when the car (C2 MY99) is hot. The noise is engine speed dependent. It is penetrating in the interior when it is audible.
It has no false air holes and is fogged.
So far, I have only noticed it when I parked the car hot and drove on afterwards.
When stationary the noise also occurs, I can really hear it at the back of the engine though as the 6 cylinders are bubbling away comfortably.
I could be imagining that it's coming from the right side (bank 2) and maybe also in the servo pump area.
Pentosin was way too much in there.
Please listen in and let me know what you think.
It's not easy to record, and hard to hear depending on your terminal, but here's the youtube video for it....
You Tube
My 99 does this too. More pronounced when it�s hot outside and it seems to go away around 4K RPMs (but that could just be other sounds over powering it). I don�t think it�s anything to worry about.
yes I have... but you can also hear it when I turn off the music.
It also sounds more technical, and I would expect to hear the noise even with the engine home open if it is the alternator,
What do you think is the reason that an amplifier could interfere with the alternator?
The amps ground wire is not big enough or has bad connections. Yes alternator whine will still happen when music is off.
To troubleshoot, disconnect all + power to the amp, see if alt whine subsides.
