om642 is chain is stretched, photo of chain tensioner
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'06 e320cdi
om642 is chain is stretched, photo of chain tensioner
How to check if chain is stretched, only by tensioner? I'm not seeing oil hole on the tensioner(attached photo)
What's the symptoms of stretched chain?
What's the symptoms of stretched chain?
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 54
Likes: 5
'06 e320cdi
If i'm talking about enigne, timing chain, tensioner... and after all I'm posted photo, i think it's clear what I'm talking about.
If you have any idea, and want to help, please... else, don't spam.
Junior Member
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From: Glen Cove, NY
2012 Mercedes R350 Bluetec
If you see the piston portion (shiny) of the chain tensioner it means your chain is stretched and the chain tensioner went past it's stop. The stops are 4 small notches on the body and prevent the piston from extending too far out. After the chain stretches past certain length the piston pushes past the notches and you see the shiny portion of the piston. That is why if you just put in a new tensioner the noise becomes more pronounced. You need to change the chain and tensioner.
I just did my chain and tensioner. 2012 R350 with 90K miles...
Hope this helps... good luck
I just did my chain and tensioner. 2012 R350 with 90K miles...
Hope this helps... good luck
Member
Joined: Mar 2016
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2010 GL350
If you see the piston portion (shiny) of the chain tensioner it means your chain is stretched and the chain tensioner went past it's stop. The stops are 4 small notches on the body and prevent the piston from extending too far out. After the chain stretches past certain length the piston pushes past the notches and you see the shiny portion of the piston. That is why if you just put in a new tensioner the noise becomes more pronounced. You need to change the chain and tensioner.
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2012 Mercedes C250 1.8L turbo
I'll let you know over the next couple of days if it fixed the issue.
Richard
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2012 Mercedes C250 1.8L turbo
And just to confirm my situation, after a cold start rattle and almost impossible to start issue I replaced the camshaft adjusters and that got things running again almost perfect. So my camshaft adjusters were bad. But I still sometimes had a minor cold start rattle issue and sometimes a P0016 code. So now to fix that I'm replacing the timing chain tensioner.
If that fails then eventually I'll replace the timing chain.
Richard
If that fails then eventually I'll replace the timing chain.
Richard
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2012 Mercedes C250 1.8L turbo
Not sure you can see the tensioner at all until you remove it from the car... if that's what you were asking.
Richard
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From: GTA
W212 Bluetec
In the very first post, there is a photo of chain and tensioner through some access hole.. My question is what is this access hole? I first thought you see this by removing oil cap, but it is not...
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2012 Mercedes C250 1.8L turbo
Richard
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sprinter mercedes
I think, you are not so stupid, so you can understand what I mean. It's a forum, everyone can ask for help/information. If you search in forum, you will find more posts with same terms.
If i'm talking about enigne, timing chain, tensioner... and after all I'm posted photo, i think it's clear what I'm talking about.
If you have any idea, and want to help, please... else, don't spam.
If i'm talking about enigne, timing chain, tensioner... and after all I'm posted photo, i think it's clear what I'm talking about.
If you have any idea, and want to help, please... else, don't spam.
But ,the tensioner never fail ? well. could be anything , right ?
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Joined: Apr 2020
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From: ATL
2006 E320 CDI
I Replaced the one on the Right with the one on the left .
Fixed the starting noise and actually a lot of other chatter 5000 miles later still fine 2006 CDI 3.2 .... 200,000 miles total
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From: Montreal/Cape Coral FL
2012 X6 35i Sport, 2013 ML 350 BT, 2019 4Runner TRD Pro, 2020 CRV-AWD
You mean you replaced the one on the left with the one on the right. The one on the left is fully extended....
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From: ATL
2006 E320 CDI
No, I do not mean that . The one on the Right has 200,000 miles on it and is collapsed which happens in CDI's and Sprinter Vans .
The one on the left is brand new . These actually do not lock and remain fully extended UNTIL oil pressure is reached . Thus the slack fix when cold starting .
I have 5,000 miles on it and it has fixed a whirling noise at the front of the engine and I no Longer have the strange noises when I start the Engine .
The one on the left is brand new . These actually do not lock and remain fully extended UNTIL oil pressure is reached . Thus the slack fix when cold starting .
I have 5,000 miles on it and it has fixed a whirling noise at the front of the engine and I no Longer have the strange noises when I start the Engine .
Last edited by Oliver1232; Apr 26, 2020 at 03:14 PM.
