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WHAT the heck is THIS??

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Old 04-24-2022, 06:58 PM
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WHAT the heck is THIS??
What’s this? Car had been off and locked for a while… 18 c300


https://youtube.com/shorts/aNLK4BGAOnM?feature=share
Last edited by ArtyV; 04-24-2022 at 08:08 PM.
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Old 04-24-2022, 07:05 PM
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Well It looks like that didn’t work lol…tried to upload a short video from my iPhone and it goes through like it should, but I don’t see it anywhere…
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Old 04-24-2022, 07:44 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Sorry to hear about the issue you are facing with your vehicle, you could try uploading to a video streaming platform or a cloud drive and then share the link here.
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Old 04-24-2022, 08:07 PM
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Originally Posted by W205C43PFL
Sorry to hear about the issue you are facing with your vehicle, you could try uploading to a video streaming platform or a cloud drive and then share the link here.
true. Fixed. Ty.
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Old 04-24-2022, 08:09 PM
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Old 04-24-2022, 10:12 PM
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So weird
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Old 04-25-2022, 08:40 AM
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Anyone?
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Old 04-25-2022, 09:55 AM
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Does the sound change in pitch or intensity with RPM changes?

My first thought is a serpinetine belt pulley bearing/idler pulley squeaking.

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Old 04-25-2022, 10:05 AM
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Originally Posted by Keith66
Does the sound change in pitch or intensity with RPM changes?

My first thought is a serpinetine belt pulley bearing/idler pulley squeaking.
Right, lol if only the car hadn’t been off and locked
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Old 04-25-2022, 10:09 AM
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Originally Posted by ArtyV
Right, lol if only the car hadn’t been off and locked
LOL, oh wow. I thought it was running! That is bizarre.

​​​​​Hmm... was this after turning it off being hot? Not sure if we have an electric water pump that runs after shutdown, I've had other cars that do.

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Old 04-25-2022, 12:05 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by ArtyV
true. Fixed. Ty.
yw and hmmm sounds like you trapped a small chick inside. : (
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Old 04-25-2022, 12:11 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
I think (if memory serves me right) that I came across a thread with this similar sound once but I need to find it first. I also can't remember what it was about, I am sorry about that I will let you know if I do find it again.
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Old 04-25-2022, 05:56 PM
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Originally Posted by Keith66
LOL, oh wow. I thought it was running! That is bizarre.

​​​​​Hmm... was this after turning it off being hot? Not sure if we have an electric water pump that runs after shutdown, I've had other cars that do.
It had been off a while.
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Old 04-25-2022, 05:57 PM
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Originally Posted by Keith66
LOL, oh wow. I thought it was running! That is bizarre.

​​​​​Hmm... was this after turning it off being hot? Not sure if we have an electric water pump that runs after shutdown, I've had other cars that do.
And if a water pump sounded like that, that’d be a w bigger problem lol
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Old 04-25-2022, 05:59 PM
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Originally Posted by W205C43PFL
yw and hmmm sounds like you trapped a small chick inside. : (
Much better than a large chick. 😊
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Old 04-25-2022, 06:00 PM
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Originally Posted by W205C43PFL
I think (if memory serves me right) that I came across a thread with this similar sound once but I need to find it first. I also can't remember what it was about, I am sorry about that I will let you know if I do find it again.
thank you
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Old 04-25-2022, 06:58 PM
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Originally Posted by ArtyV
And if a water pump sounded like that, that’d be a w bigger problem lol
Agreed, nothing should sound like that, lol. Gotta narrow down what it could be.


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Old 04-25-2022, 07:00 PM
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A suggestion is to get a paper towel cardboard tube or something similar on your ear and move around until you can pinpoint the location of the source.

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Old 04-25-2022, 07:03 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by ArtyV
thank you
I do apologize but I didn't have luck finding the thread, let's see if we can diagnose this together:
1. Does the sound happen when it is humid and what is the ambient temperature?
2. How frequent this sound occurs?
3. Does the sound comes and goes?
4. Any chance that you can open the hood and hear if the sound is louder when you place your recording device near certain components?
5. Try pushing on components as well.
6. Ignore step 4-5 if it is coming from beneath the engine.
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Old 04-25-2022, 07:05 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by Keith66
A suggestion is to get a paper towel cardboard tube or something similar on your ear and move around until you can pinpoint the location of the source.
That is an interesting suggestion
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Old 04-25-2022, 07:08 PM
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Originally Posted by W205C43PFL
That is an interesting suggestion
I've found many sources of sounds in my years doing this.

You look like a fool doing it, but it works!



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Old 04-25-2022, 07:10 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by Keith66
I've found many sources of sounds in my years doing this.

You look like a fool doing it, but it works!
Honestly if it works, it is all what matters. Right?
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Old 04-26-2022, 05:35 PM
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That hissing sound is weird. Does it make that sound too when your engine is on?
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Old 04-28-2022, 11:33 PM
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I got it!

it’s the Chirpentine Belt 😂🤣😭
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Old 05-01-2022, 05:18 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
OP, any luck finding the cause of the issue, hopefully?

Did you also try by using forum member Keith66's method it should help.
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