[W126 Coupe] Timing Chain Replacement

[mavris2 at comcast.net]

You should replace the chain, rails, tenisor, ect.     The rails become brittle and this is what causes the damage when they break and the chain jumps causing the gernade issues.  I did mine at 95K and again at 195K.  The chain was slighty streached in both cases and you could see the worn rails.  But I would do it anyway regardless of what they say, it worth the money.  

Jason 


> Hi Dick:  Mileage is ~ 98,000, guidance on the MB
> Coupes website says to replace the chain as a
> precautionary measure.  The local MB dealership says
> there is no need to replace the chain unless an
> inspection detects a problem.  To my knowledge, the
> chain has not been inspected.  
> 
> I am trying to resolve the two viewpoints and ensure
> that my engine does not grenade.  Mark
> 
> --- Dick Spellman <spell.yy at verizon.net> wrote:
> 
> > What is the mileage?  Has the chain and tensioned
> > been replaced in the past?
> > How much stretch did they measure that told them the
> > chain need replacing?
> > 
> > Regards,
> > 
> > Dick
> > 
> > The MB Coupes Website!
> > W126 SEC Mailing List
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> > 
> 
> 
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> 
> 
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