C32 AMG, C55 AMG (W203) 2001 - 2007

Sounds like my IC pump is about to go down...

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Old Dec 1, 2009 | 01:59 AM
  #1  
Koru_Kinshi's Avatar
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2018 E63S AMG, 2003 SLK 230 Sport, 2004 SL 600, 2006 SLK 55 AMG, 1998 E320 Wagon
Sounds like my IC pump is about to go down...

I'm hearing this buzzing sound when the car turns on, and on occasion when I'm at a stop. Sounds like it's coming from the left side of the engine, which leads me to believe it's an IC pump.

Now, seeing as I have a warranty, should I just let them handle it, or should I upgrade the pump? I'm not really interested in getting a bigger heat exchanger, yet.
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Old Dec 1, 2009 | 02:25 AM
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C32 '02
The ic pump is actually on the passenger side, below the smog pump.
Fwiw, the HE lowers the intake temps quickly and is def worth it. Just FYI, The stock held about 500 cc of liquid while the HE from EC for example held about 1200-1300cc. Also the bigger cores.

Last edited by ML500K; Dec 1, 2009 at 02:28 AM.
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Old Dec 1, 2009 | 03:50 AM
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The noise is on the passenger's side. I meant left side when facing the hood, heh.
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Old Dec 1, 2009 | 08:20 AM
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C32 '02
If you do get the OEM pump, make sure the part no. is A000 500 03 86
its the "newer" version of the IC pump.
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Old Dec 1, 2009 | 10:45 AM
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Marsaydees
could be the secondary air pump too
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Old Dec 1, 2009 | 07:13 PM
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2003 porsche 996 turbo
no need to upgrade to aftermarket i/c pump if you arent incresing the size of the h/e. when your ready go big!! my h/e is 26" w x 16" t x 1" wide. neve have any shutdown issues after the install
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Old Dec 1, 2009 | 07:24 PM
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Originally Posted by Dingleberry
could be the secondary air pump too
iirc the 2nd pump failures will throw a dtc code...since you have warranty, have your workshop/dealer hook up to star and have a look.
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