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

belt area sound

Old Jul 26, 2017 | 10:44 AM
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2002 MB C320 Sportswagon
Unhappy belt area sound

alrighty, so bought my 320 with 156k for 700. but ive obviously have had some issues arise. one most notibly is i have a sound coming from the front of the engine kinda sounds like the idler pully has lost tension, but it hasnt. full accesory drive system has been replaced by a mercedes dealer a week before i purchased. it only happens when i start it while in the morning. ive been thinking maybe the chain tensioner? if i get a chance to i will record a vid. i have not noticed a issue with the driving.
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Old Jul 26, 2017 | 11:32 AM
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W204 C220CDI 2011
Alternator pulley......
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Old Jul 26, 2017 | 11:44 AM
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C320
Originally Posted by alecmascot
Alternator pulley......
C320 has a solid alternator pulley, no OAP. I would remove the belt and spin each pulley by hand.
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Old Jul 27, 2017 | 09:51 AM
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2002 MB C320 Sportswagon
Yeah ive taken the belt off and checked all pulleys. alt, and idler are brand new. i feel like it could be the chain tensioner, if i replaced that would that cause the chain to get off time? or any adverse effect?
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Old Jul 27, 2017 | 10:14 AM
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W204 C220CDI 2011
Run the engine for a short while with the belt off and see in the noise it still there.
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