Mercedes-Benz m271 engine knocking noise on startup

Mercedes-Benz E200 2007 (w211)

This noise is only heard on a cold startup.
200k kms and on its original timing chain.

No problems so far...

[TheAlbanianTechGuy]

Update, the engine finally failed @258k km's. The teeth of the camshaft sprockets are completely eaten and the chain is stretched. Exhaust camshaft jumped 2 teeth. The engine still turns smoothly by hand. I'm going to change then chain, sprockets and guides since there is hope that the valves are not bent due to the bad timing. I'll make an updated video once the parts arrive.

[Flankerski]

Hydraulic lifters are the ones who make that noise at cold starts, until the oil gets to them and the noise dissappears. No issues with the timing chain. Even newer cars have these sounds at lower mileage.

[costaskalantzopoulos]

The noise is perfectly normal for cold start. It needs a couple of seconds for the oil to circulate and lubricate the upper parts of the engine. If your timing chain was in bad condition, you would hear a very harsh rattle. However if you have 200k kms you should consider changing it anyway before it is too late.

[TheAlbanianTechGuy]

The car now has 250k km’s with regular oil changes. The same noise is heard on startup, nothing more. It has proven to be reliable

[SinisterSouthSide]

3 day ago I changed my chain at 178000 km. New chain, sprockets and tensioner. Little noise is still there. Yours is close to my noise, but a little longer.

[bayezitsalgur]

Just took my W211 E200 Kompressor with 115k miles to service for timing chain replacement. I had the exact same sound though it sounds to be just the lifters waiting for oil. But upon inspecting the timing components, it was found that the chain had indeed stretched but the most concerning part was the cam gears teeth were 70% worn away. The engine was in imminent timing failure. My suggestion is that if not done already, take it immediately for a timing checkup. Though M271 on W203 dont appear to have such grave concerns on lower mileage regarding the cam gears, but chain is defo a must-check item.

[alexeeezh]

Das ist normal. Ich habe meine Steuerkette, Nockenwellen Versteller, Magnetventile, Hydrostößel & Zylinderkopfdichtung getauscht und das Geräusch ist immer noch da.
Höre bei Ihnen keine problematischen Geräusche👍🏻

[andreas.gusakov]

Have exactly same noise especially when its cold. CLK 200 Compressor, 98k.

[estebansouki]

Hi guys... I have the same noise... But it lasts more than that... What do you reccomend??

[Roman.A.]

Its ok, my have same sound after new timing chain

[vinh]

I have the same noise when it starts 1-2 seconds and than normal noise of engine. What causes that because i have changed the timing chain before 25k kilometers. My engine is m111 w203 c180 129ps

[bletarzeka]

Ke ndonje foto te camshaft magnets kur kishin rrjedhje? Imja eshte mbushur gjithashtu por se di nga vjen rrjedhja

[DestinyAghayere-dj]

I am a mechanic, I have problems with this car now, the car is not racing, please can you put me true

[Slowwvqs]

Check the idle tensioner pulley maybe it’s moving too much it’s a problem im having in mines and I went to countless mechanics and gotten told it’s timing chain, It’s the cam phasers it’s lifters until I looked closely and it would randomly do it and ever so slightly but just enough to cause it to bang around

[EltonBeqiri-tv]

i had te same cnocking wat its that noise?

[Ali-jtgn]

I installed new motor to corolla but after 3 months the same noise is heard after cold start for 1, 2 mins,

[wbhook]

i have this noise but its continous and doesnt really quiten down too much even when car is warm, when car is cold i have a bit of coolant in my oil and the "check coolant level" warning message comes up even though my coolant level seems fine, any ideas?

[HardeepSingh-bees]

I have this same noise on my W220
Sound goes after 1 minute of cold start
Any solution

[ledlabz]

O shqipe kom nji problem me ket motor, kur jam ne D i ndalum fillon misfire pistoni 4, ja kam ndru kandele e bobina te gjitha po prap e Bon, is Ke noj ide cfar mund te jet ?

[maciejsn]

To me sounds like hydraulic tappets. Got same noise for few sec when its really cold. Previous owner been using 10w40 😮 so probably going on right oil grade will help a bit