what is this sound"with video" - MBWorld.org Forums

Feb 14, 2016 | 04:44 AM

larsianer

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Joined: Mar 2015

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w211

what is this sound"with video"

Can this be the oil pump chain,or the harmonic balancer??
i will change the harmonic ballancer in some days, i am just waiting for some tools.i have tryed to remove the belt,and the sound is still there.
i have changed the chain tensioner.
what do i have to remove for checking the if the chain has streched?

The idle fluktuates,as seen in the end of the video, i am sure that has something to do with the sound.

when the car idles high"cold start",the sound is not there, but when it revs down, the ticking/knocking sound is there.and it goes away after a while

If the harmonic balancer is bad, can it cause this sound?
its a w211 220cdi 2008,with 434,000km

The belt is new, the waterpump is new,the idler wheels are new.the alternator is overhaled

I do all the work myself,cause it cost to much to go to the dealer..

Feb 14, 2016 | 08:43 AM

homeofstone

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From: Athens, GA USA

2011 E63, 2011 Hyundai Genesis 4.6 v8, 2013 GMC Denali XL, 1965 Ford Mustang, 2005 Merc. E500

Bad idler pulley is one thing. Purchase a mechanics stethoscope and then you can find where the noise is coming from.

Feb 23, 2016 | 02:33 PM

larsianer

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w211

now i have changed the harmonic balancer, and the sealing,and the sound is still there,but when i removed the crank sealing, i could move the oil pump chain little,shall the oil pump chain be thight,or a little lose???

Feb 23, 2016 | 03:31 PM

Heatwave

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2007 E350; 2018 GLE350

Have you ruled out intake manifold leak?

Feb 23, 2016 | 03:36 PM

larsianer

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w211

i have a new intake manifold on the way,its here on friday,i will mount it this weekend.can i change the oil chain tensioner if i remove the oil pan??

Feb 23, 2016 | 03:42 PM

rapidoxidation

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From: In the Shadow of the Tetons

2013 ML350 Bluetec

+1 on the stethescope. No need to keep throwing parts at it until you KNOW which part(s) to throw at it.

Feb 23, 2016 | 03:50 PM

larsianer

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w211

i have tryed to use the stethescope, and i really cant hear where the sound come from,i think i heard a sound under the harmonic balancer,at the oil pump chain..so do any of you know if i only need to remove the oil pan,for to change the oil pump chain tensioner and the chain?

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Feb 27, 2016 | 08:06 PM

larsianer

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w211

Now i have changed the inlet manifoild,the old manifoild was full of debris, and the swirl flaps,could not move,the swirl flaps vacuum pump was not working,it was leak.
Now the car is much better&faster,but i still have the ticking sound,when i changed the harmonic balancer, all the start up sound went away,only the ticking is left,that i think is the oil chain.
I will try a cold start tomorrow and see it the erratic idle is gone."i hope so"
it it any here that have changed the oil chain on a 220cdi engine??
cause that will be my next blind shoot to get the ticking sound away

btw:one of the inlet manifoild bolts where gone..so the old manifoild was a little leak also

Thanks for all reply i have got in this post.
Regards:Lars