That whining noise on start up for 30-45 seconds

Mickey42

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2005 CLK 320
Hello again,
I`m trying to find out what that whining/whistling sound is on start up. Sounds like a high pitched motor sound and then cuts out. I have had battery problems recently and just put a new one on so had disconnection. Is it a problem?

Many thanks again,

Michael
 

lordgaz

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W220 S-Class S55 AMG 2000 / W220 S-Class S55K AMG 2003 / W163 ML270 / Jaguar XJR X350
Not sure what vehicle you have, but it could be the secondary air injection pump which whine for a bit after starting (often at the front of engine at top)... do you know where the sound is coming from?


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Mickey42

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W209 320 is the vehicle. I haven`t investigated it yet but thanks, I will have a proper listen.
 

lordgaz

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W220 S-Class S55 AMG 2000 / W220 S-Class S55K AMG 2003 / W163 ML270 / Jaguar XJR X350
W209 320 is the vehicle. I haven`t investigated it yet but thanks, I will have a proper listen.

Presuming it is petrol, the part I am thinking of is here IMG_7962.JPG


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Mickey42

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2005 CLK 320
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That`s where it is, so thanks. After research, it is just for emissions purposes only?
 

Jim2

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1st Merc 2010 E Class W212 2.1 CDI. 2nd Merc 2014 E Class W212 220 CDI
Does the OM651 engine in the w212 MB have the same setup? Because briefly after start up, I have a "whistling" noise in mine too, seem's to be coming from the dash, but equally could be from under the bonnet. Only does it intermittently.....never does it when I have some one listening under the bonnet....:cool::cool::cool:.
 


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