Whining noise linked to RPM

[$w!ft]

Hi guys,

Can anyone confirm this noise on their car?

It was not apparent a few days ago on mine, maybe something linked to the recent cold weather kicked it in?

It is a whining noise, similar to a pump, linked to the engine RPM, (doesn't matter if in gear or not)

Short video, you have to listen carefully but you can hear it whining up and down

[shane@mbtech]

Is radio on?

Sounds like interference, heard it on a few cars before now with bad radio wiring install.

Is it in the cabin?

[philo_csl]

Altenator it's sounds to me,only a guess

[philo_csl]

Is radio on?

Sounds like interference, heard it on a few cars before now with bad radio wiring install.

Is it in the cabin?

Same as I thought,needs suppressor in line,had this lots with old cars with upgraded hifi over the years,alternator noise through stereo.....if I recall:-D

[shimmy]

kep an eye out for the alt red light....then you have circa 70 miles to dead battery

[$w!ft]

Same as I thought,needs suppressor in line,had this lots with old cars with upgraded hifi over the years,alternator noise through stereo.....if I recall:-D

no radio on, no a/c on.

I do have aftermarket hifi speakers with subwoofer and amps. Could be background coming through as you said philo.

It didn't do it today. Very strange. Replaced the alternator about a year and a half ago I think... would be surprised for it to go out again!

[$w!ft]

well well well.... Alternator just died on me today. Left me standing on chelsea embankment for almost 2 hours. Lucky it didn't happen on the bridge. Guess the prognosis was correct!

I all of a sudden got red battery light and 5 mins later it was gone.

Wonder what courtesy car ill get.

[glendog74]

well well well.... Alternator just died on me today. Left me standing on chelsea embankment for almost 2 hours. Lucky it didn't happen on the bridge. Guess the prognosis was correct!

I all of a sudden got red battery light and 5 mins later it was gone.

Wonder what courtesy car ill get.

Doh! I remember when mine let go - pants! :banghead:

[shimmy]

Doh! I remember when mine let go - pants! :banghead:

Luckily mine let go when an M tech was driving it after dong some warranty work, apparently.

[giraffe]

Luckily mine let go when an M tech was driving it after dong some warranty work, apparently.

:thumbs:

[AlexGTT]

Luckily mine let go when an M tech was driving it after dong some warranty work, apparently.

To be fair Shim, there was a significant time when only M techs were driving your car. :wink:

[END OF IT]

Out of interest how many km's had she done before letting go

[JBird]

I had one let go and got about 50km warning till the battery died, so managed to get to a garage in time. A second one went quickly, with only minutes of warning, if that. Battery tested and ok. Can be dangerous, glad to hear you were able to pull over safely. Whining noise noted!