CLS 250cdi (x218) (om651)

[garethbevan59]

Hi guys is there a way of checking the timing belt for stretch without a strip down? Also is fitting the timing belt tensioner a DIY job? I think I may have heard a weird noise for a couple of seconds during a cold start up but can't be sure. Thanks

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[ajlsl600]

as far as i know, no belt here. its chain and my research indicates that i can change chain and tensioner but its not for the inexperienced or faint hearted . if mine started clanking i would change tensioner 1st in case thats the culprit i certainly would NOT be driving it about until i knew wot was going on.

 

[garethbevan59]

Hi guys is there a way of checking the timing belt for stretch without a strip down? Also is fitting the timing belt tensioner a DIY job? I think I may have heard a weird noise for a couple of seconds during a cold start up but can't be sure. Thanks

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Sorry I meant timing chain not belt

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[garethbevan59]

Also if the noise is not present at every start up then is it ok?

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[malcolm E53 AMG]

The wear can be chain guide, chain or sprocket, my guess is that if the sprocket wears there is more of a tendency to hear intermittent noise on start-up, suggest you replace all three if the job needs doing

 

[garethbevan59]

The wear can be chain guide, chain or sprocket, my guess is that if the sprocket wears there is more of a tendency to hear intermittent noise on start-up, suggest you replace all three if the job needs doing

Thanks for the comments but how do I know the job needs doing?

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[Gazwould]

What's the service miles intervals been like and has stop start been operating ?

 

[malcolm E53 AMG]

I’d start by replacing the chain tensioner which is a relatively inexpensive job and if that doesn’t fix the problem a new chain and sprockets will be required

This is a 212 strip down to show how the chain and tensioner job is done

 

[garethbevan59]

What's the service miles intervals been like and has stop start been operating ?

Hi, so background is that I've only had the car since Jan this year I bought car from centre of London fmbsh till 65k nothing after this now has 85k I service it myself once I got it in Jan with proper stuff - I'd say start stop been non stop in London environment

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[garethbevan59]

Talking with my local indie, and it's booked in for next week to have timing chain kit replaced he says he does them regularly, I forgot ask him what a timing chain kit entails anyone know? Is it timing chain, tensioner and pulleys?

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[davidsl500]

I've seen kits with and without sprockets. If it's an MB Indy I would expect he will change the lot but there's no harm in asking him? Just google OM651 timing chain kit and checkout the pics..

Many believe that the start/stop function may cause wear on the chain so turn it off everytime you start off..

 

[Gazwould]

Hi, so background is that I've only had the car since Jan this year I bought car from centre of London fmbsh till 65k nothing after this now has 85k I service it myself once I got it in Jan with proper stuff - I'd say start stop been non stop in London environment

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Not good so not surprised , yes London is a place one would save fuel with stop start , except you don't in the end .

 

[ajlsl600]

get in put in key turn on hit the dissable stop start button ecco? my arse , not for me/my wallet anyway . it sure will wreck chains/starters .

 

[Gazwould]

Disabled mine by pulling the 7.5A auxiliary battery fuse .

 

[garethbevan59]

I've seen kits with and without sprockets. If it's an MB Indy I would expect he will change the lot but there's no harm in asking him? Just google OM651 timing chain kit and checkout the pics..

Many believe that the start/stop function may cause wear on the chain so turn it off everytime you start off..

He says kit contains chain, tensioner and guides

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[ajlsl600]

Disabled mine by pulling the 7.5A auxiliary battery fuse .

wot else does that fuse run ?

 

[Gazwould]

Nothing except the auxiliary battery .

 

[ajlsl600]

Nothing except the auxiliary battery .

sounds almost , for benz, to good to be true . no dash display abut that ? prob logs a fault code, guess it dont charge that batt then ? but if thats all ? grand solution

 

[Gazwould]

A blessing , no eml , just a stored fault code.

Months later the battery had good voltage as I connected the charger and took no time at all .

 

[ajlsl600]

OK. I might try same thing...