[W126 Coupe] Valve Job?

[Axel Wulff]

Christopher,

Yes, I definitely think you should get a second opinion.

The valves and injectors wear out. From what I have heard, the injectors are 
probably due for a change at about 150k miles and the valve seals at about 
the same mileage. At about 175-200k miles, your engine probably will need a 
complete head job.

However, the injectors and valves tell you when they are tired. They are not 
like the timing chain, which can fail suddenly and catastrophically. If the 
injectors are worn they can no longer hold pressure properly and you'll have 
hesitation when accelerating and probably some hard start problems. If you 
experience any of these symptoms, your first stop should be a can of Techron 
fuel injector cleaner in 1/2 tank of gas. That will clean them right up. If 
you still have problems, you may want to have the injectors replaced.
Problems with the valves has a number of symptoms, some of them similar to 
bad injectors; the engine will be a bit "rough" and "agricultural", you may 
even hear some "tapping" beneath the valve covers.

If your car runs smoothly and accelerates without hesitation, I'd get a  
second opinion on what is needed.

....and $5,000 is definitely too high a price for the work you listed.



Regards,
Axel J. Wulff




>From: Christopher Shurley <cashtexas at yahoo.com>
>Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
>To: mbcoupes at mbcoupes.com
>Subject: RE: [W126 Coupe] Valve Job?
>Date: Mon, 8 Aug 2005 23:36:06 -0700 (PDT)
>
>Hi Axel--I already did the timing chain and guides @
>98k (a couple of years back...don't drive much).
>
>So I take it I should get a second opinion?
>
>thanks
>christopher
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.