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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > what is that scratching sound from engine??



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      10-06-2016, 03:06 PM   #1
libertycrd
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what is that scratching sound from engine??

Hello,

i searched but haven't found the same sound from other owners...

it's like a grinding from a belt?

do you guys can help me with that?

thanks for your time
here's the link for the video: https://youtu.be/iCasQgx1VkM

p.s.: sorry, wasn't able to embed it...:

[u2b]<iframe width="560" height="315" src="https://www.youtube.com/embed/iCasQgx1VkM" frameborder="0" allowfullscreen></iframe>[/u2b]
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      10-07-2016, 02:40 AM   #2
DarkNemesis
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Sound like something is lose.
It's also vibrational.....not synced to engine or anything else.
But the knock makes me want to say a motor which is periodically on/off.

Ok first off.....try this.
Find my DIY on N54 Serpentine Belt and Upper and Lower Pulley.
Read it Only.
Familiarize yourself with all the parts.....screws....clips and all.

Wait till morning when engine is cold.
Now start stressing each part for a something lose.

Also.....underbelly Plastic shield and Wheel Arch plastic covers.....all screws in place.
Last.....Front Brake Vents.....are they installed correctly.

Keep us posted.
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      10-07-2016, 11:16 AM   #3
libertycrd
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Thanks, i will do that!


Quote:
Originally Posted by DarkNemesis View Post
Sound like something is lose.
It's also vibrational.....not synced to engine or anything else.
But the knock makes me want to say a motor which is periodically on/off.

Ok first off.....try this.
Find my DIY on N54 Serpentine Belt and Upper and Lower Pulley.
Read it Only.
Familiarize yourself with all the parts.....screws....clips and all.

Wait till morning when engine is cold.
Now start stressing each part for a something lose.

Also.....underbelly Plastic shield and Wheel Arch plastic covers.....all screws in place.
Last.....Front Brake Vents.....are they installed correctly.

Keep us posted.
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