Timing chain C220

Steve Connor

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Hi I am wondering how much it would cost to replace Timing chain on a 142 merc C220 and when it nedds to be done
Thanks all
 

Dean Fletcher

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Hi I am wondering how much it would cost to replace Timing chain on a 142 merc C220 and when it nedds to be done
Thanks all
Hi Steve iv heard quotes anywhere from £400 to £1500 depending where you go. Some people just change the tensioner which sorts the problem.
 
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Steve Connor

Steve Connor

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OK great thanks
 

mioba

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Chains are not like belts with a service interval.
Have you a problem with the chain.
 

Blobcat

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The chain is at the back of the engine so a pig to get at
 
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Steve Connor

Steve Connor

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Chains are not like belts with a service interval.
Have you a problem with the chain.
No no problems.. Just buying a new car and was wondering 156kms on clock
 

mioba

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I have never had a MB chain replaced on a merc (touch wood).
There are a few engine models with problems I think with sprockets, which leads to chain rattle.
Without searching all the threads on here, I am sure someone will pipe up and tell you what to look for if the chain/sprockets needs replacing.
 
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Steve Connor

Steve Connor

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Thank you
 
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Steve Connor

Steve Connor

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Anyone know if the c220 2014 has cruise control
 

mersum1es

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Don't know of any Mercedes that doesn't.

It became an option (IIRC) for W204 with manual transmission...

OP: It is OM651 engine, do a search... I would follow timing chain issues carefully.
 

rash.m2k

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Depends if stop start has been used - mine has been off since 57k miles, mine is 165k miles, and no chain rattle.
 

steveq

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I don't think you can put timing chain issues just down to stop/start.
There are cars with high mileages with stop/start active and no timing chain issues.
There were timing chain issues on OM651 engines in cars prior to stop/start.

It is as likely to be caused by poor servicing, extended oil change intervals and driving style. The quality of the components is obviously a cause too.

I don't know the percentage of OM651engined cars that have had timing chain issues but I suspect it is small.
 

LostKiwi

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Stop start definitely won't help matters.
The point when the chain is under maximum stress is initial start from stationary. Repeated starts from stationary will therefore aggravate any potential for wear.
 

steveq

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Well the chain is under tension at all times so stop/start induced frequent starts doesn't exert a sudden snap of tension which could cause a chain to stretch.

I have never heard of a definitive reason for the cause of the problem. The OM651 is MB's most produced engine ever and only a small number have timing chain issues. Some of those were on vehicles without stop/start. The number of cars with problems is probably too small to be statistically significant in pinpointing the cause. Most if not all cars with timing chain issues are probably outside the MB dealer network so no mechanical analysis can be undertaken (even those in the dealership network aren't analysed). Anyway it is dubious that mechanical analysis would actually show the root cause.

It isn't as simple as turn off stop/start and you won't have timing chain problems.
I suspect that leaving oil changes for too long, using inferior quality oil and thrashing the engine to within an inch of its life are much bigger factors.

MB have persisted with the simplex chain in the OM654 engine which replaced the 651 so they must believe their design is OK.
Stop/start is in use for almost 10 years and is here to stay.
 


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