C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

whistling noise coming from engine??

Old Nov 20, 2006 | 10:43 PM
  #1  
djartin's Avatar
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From: La Crescenta, CA
'07 C230
whistling noise coming from engine??

i have an '07 c230, and so far it had made no trouble since early-August, now after 1300 miles, my car is making a very irritating whistling noise from the engine, i opened my hood and he told me its coming from the belt area, i forgot the real name of it, anyways he said it's either the circular thing that the belt rotates on, or it's the belt itself, he has i believe a 95 Infiniti I35 and his was making the same noise, he said he replaced that circular thing and now it doesn't make that noise at all. What do you think the noise is coming from and why. My friend actually has a clk 350 '06, and his was making the same noise too, and he took it in to the benz dealer, and they said they had to replace something (he doesn't know which part), when he got the car back after the part had been replaced, his car is making the same noise as it did before the replacement. So i want your ideas, before I take it in to the dealer

greatly appreciated
-art
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Old Nov 21, 2006 | 01:50 AM
  #2  
TruTaing's Avatar
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From: Seattle
w203 m112
Originally Posted by djartin
i have an '07 c230, and so far it had made no trouble since early-August, now after 1300 miles, my car is making a very irritating whistling noise from the engine, i opened my hood and he told me its coming from the belt area, i forgot the real name of it, anyways he said it's either the circular thing that the belt rotates on, or it's the belt itself, he has i believe a 95 Infiniti I35 and his was making the same noise, he said he replaced that circular thing and now it doesn't make that noise at all. What do you think the noise is coming from and why. My friend actually has a clk 350 '06, and his was making the same noise too, and he took it in to the benz dealer, and they said they had to replace something (he doesn't know which part), when he got the car back after the part had been replaced, his car is making the same noise as it did before the replacement. So i want your ideas, before I take it in to the dealer
I only counted three periods in this short story. :x

My friend's truck had a belt that would squeel when it got too cold / wet out. He purchased a spray for the belt that helps keep the belt dry and the sound went away. Maybe the belt was replace on your friend's car.

-j0hn
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Old Nov 21, 2006 | 06:36 AM
  #3  
yeuchau's Avatar
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From: SoCal, Irvine
Stage 2 C7 A6, QX60
just take ur car in, and have them fix it under warranty, nothing to worry about
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Old Nov 21, 2006 | 12:20 PM
  #4  
SlvrC230SS's Avatar
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From: The OC
2006 C230SS & 2009 E350
I had the similar problem a few weeks ago and it was the idler pully.
I have 06 W203, just take it in, it's still warranty anyway.
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Old Nov 21, 2006 | 03:40 PM
  #5  
flipnf3rno's Avatar
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From: Southern Cali
06 C230 Black/Black
Took my 06 C230 last Tuesday and they also told me it was my idler pulley. The part is in national backorder right now though.
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Old Nov 22, 2006 | 12:44 PM
  #6  
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From: La Crescenta, CA
'07 C230
Originally Posted by TruTaing
I only counted three periods in this short story. :x

My friend's truck had a belt that would squeel when it got too cold / wet out. He purchased a spray for the belt that helps keep the belt dry and the sound went away. Maybe the belt was replace on your friend's car.

-j0hn

i'll probably end up taking my car in to the dealer and have them fix the idler pully as they said under warranty, if i see that it still makes the noise i'll buy that spray you're talking about and see if that works.

thanks alot
-art
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Old Nov 22, 2006 | 12:45 PM
  #7  
djartin's Avatar
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From: La Crescenta, CA
'07 C230
btw, nice e36 yeuchau
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Old Nov 22, 2006 | 01:51 PM
  #8  
birdy's Avatar
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does anyone know how much it cost to get idler pulley replace? because i got no warranty on my coupe. I heard the whistling noise when am going over 40mph.
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