Timing Chain tensioner
Thread Starter
Junior Member
Joined: Dec 2017
Posts: 34
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2012 C63
Timing Chain tensioner
Has anyone ever had to do any timing chain work on thier M156/W204 C63?
I have a noise from around 1500-2500rpm on light throttle that sounds like a tuk tuk tuk tuk noise that goes away when you lift off the throttle (suspect its there higher rpm but gets drowned out by engine/exaust.
I'm wondering if it is the timing chain or a guide or tensioner.... is it possible to check the tensioner or anything related without major work? ie pulling out the engine?
If timing chain needs replacing that's engine out job... does the head need to come off?
I have a noise from around 1500-2500rpm on light throttle that sounds like a tuk tuk tuk tuk noise that goes away when you lift off the throttle (suspect its there higher rpm but gets drowned out by engine/exaust.
I'm wondering if it is the timing chain or a guide or tensioner.... is it possible to check the tensioner or anything related without major work? ie pulling out the engine?
If timing chain needs replacing that's engine out job... does the head need to come off?
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10 C six trizzle
I doubt its the tensioner or chain, never seen one fail - they are hydraulic with oil pressure. Its more likely to be a camshaft adjuster, camshafts or lifters. First thing id check into is your oil filter. is it oem? are you using good quality oil. Unless it's crazy high mileage a chain would be pretty out of the ordinary.
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From: Long Island
'16 CLS63S
Ive been trying to track down a noise for quite some time and my next move is to swap the tensioner. I have it sitting on the shelf but haven't had a chance to swap it. Looks easy enough once you pull the belt and move the alternator. Lifters changed, cam adjusters changed. Noise still there. Only happens when the oil gets over 225. My thinking is that the perhaps the seal in the tensioner is starting to fail and it cant hold pressure once the oil gets hot and thins out. Causing the chain to slap on the guide. Dealer cant get it right. Frustrating.
Thread Starter
Junior Member
Joined: Dec 2017
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2012 C63
I doubt its the tensioner or chain, never seen one fail - they are hydraulic with oil pressure. Its more likely to be a camshaft adjuster, camshafts or lifters. First thing id check into is your oil filter. is it oem? are you using good quality oil. Unless it's crazy high mileage a chain would be pretty out of the ordinary.
Mileage is 60,000KM.
Took a video of the noise this morning (this was when cold, not that it matters it will be there when warm as well). You can hear it betwen about 1000-1500rpm in the background as a quick knocking type sound and it goes away as the gear changes/engine revs drop back to 1,000. Listen about the 4-5 second mark in the background.
https://www.dropbox.com/s/j6sfkz5frg..._3242.MOV?dl=0
Keep in mind noise stops when i come off throttle and doesn't happen when in neutral so needs load to make it happen....
Thread Starter
Junior Member
Joined: Dec 2017
Posts: 34
Likes: 3
2012 C63
Ive been trying to track down a noise for quite some time and my next move is to swap the tensioner. I have it sitting on the shelf but haven't had a chance to swap it. Looks easy enough once you pull the belt and move the alternator. Lifters changed, cam adjusters changed. Noise still there. Only happens when the oil gets over 225. My thinking is that the perhaps the seal in the tensioner is starting to fail and it cant hold pressure once the oil gets hot and thins out. Causing the chain to slap on the guide. Dealer cant get it right. Frustrating.
Super Member
Joined: Oct 2015
Posts: 723
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From: Long Island
'16 CLS63S
I don't have the WIS but Ive seen a few videos/pics of the m156 showing its position and it is right behind the alternator. You can access it from under the car once you remove the belt and unbolt the alternator completely and remove it or possibly rotate it enough to pull the tensioner out.
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Last edited by BLKROKT; May 13, 2018 at 09:20 PM.
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C63 AMG
I've changed the oil and oil filter recently - that helped with the lifter/cam ticking noise as its pretty much gone (Liqui Moli and Ceratec). I'm pretty sure that at least one of the cam adjusters needs replacing (rattle on startup) but I don't think that is the cause of this noise.
Mileage is 60,000KM.
Took a video of the noise this morning (this was when cold, not that it matters it will be there when warm as well). You can hear it betwen about 1000-1500rpm in the background as a quick knocking type sound and it goes away as the gear changes/engine revs drop back to 1,000. Listen about the 4-5 second mark in the background.
https://www.dropbox.com/s/j6sfkz5frg..._3242.MOV?dl=0
Keep in mind noise stops when i come off throttle and doesn't happen when in neutral so needs load to make it happen....
Mileage is 60,000KM.
Took a video of the noise this morning (this was when cold, not that it matters it will be there when warm as well). You can hear it betwen about 1000-1500rpm in the background as a quick knocking type sound and it goes away as the gear changes/engine revs drop back to 1,000. Listen about the 4-5 second mark in the background.
https://www.dropbox.com/s/j6sfkz5frg..._3242.MOV?dl=0
Keep in mind noise stops when i come off throttle and doesn't happen when in neutral so needs load to make it happen....
Thread Starter
Junior Member
Joined: Dec 2017
Posts: 34
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2012 C63
Hey - Nope never did, 5 years, 50,000KMS later and no issues so who knows what the deal is
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From: West Grove, PA
'21 GT4, ‘11 C63 P31, ‘04 VW .:R32, '88 Chrysler Conquest TSi, ‘15 Ram Longhorn, '
Mine has made that noise for the last 25k miles, no issues. It annoys me, but I chalk it up to the noisy M156. I should note that my upper pan gasket was leaking soon after I bought it (2018, 30k miles). When they opened everything up they found that the main bearing on the first journal started to move because when the upper pan gasket was previously done, but the old hardware was reused so it started to loosen up.
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C63 W204
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w204 c63
hi ，I have also encountered the same problem. Have you solved the problem
