[W126 Coupe] smoke on start up?

[gary peck]

Mister McGoo

Where is the cold start injector located on my 560 SEL Euro? I do know where
the cold start valve is located, and/or are they one in the same? I'm
currently having a minor cold start problem. The archives mention that the
cold start injector could be leaking, thus on first startup theres not a
balanced air mixture, the article further mentions that cleaning the
injector might correct this, if not it has to be replaced.

Gary Peck
----- Original Message ----- 
From: "Mister McGoo" <eelploot at hotmail.com>
To: <mbcoupes at mbcoupes.com>
Sent: Thursday, October 06, 2005 2:21 AM
Subject: RE: [W126 Coupe] smoke on start up?


> An opinion?  Don't worry about it.  The cold start injector is enrichening
> mixture for quick starting likely causing the black puff from a cold
engine.
>   It is designed to only operate when starting the engine from cold.  It's
> normal.
>
> Plus it sounds like you are getting a tiny bit of oil leak-by on the valve
> stem seals.  It is likely so minor it is only visible (blue) on start-up.
>
> It is nothing you would do anything about unless it gets really bad, and
> then it would likely be valve guide time anyway.
>
> It sounds to me like you are miles and miles away from that.  Relax and
> enjoy the car...
>
> -Bellamy
>
>
> >From: "Shayegan, Richard" <rishayegan at davidson.edu>
> >Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
> >To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
> >Subject: [W126 Coupe] smoke on start up?
> >Date: Wed, 5 Oct 2005 22:17:10 -0400
> >
> >For a long time now (5 years or so) I've gotten a puff of black smoke
> >out of the tailpipe when I cold (or cool) start the car. I basically
> >ignored because last time I had the car in the shop, I showed the guy
> >(he was replacing a leaky fuel line while I was on the road, but he was
> >a good mechanic at a good dealer MB of Alexandria) and he said it's just
> >age and not to worry about it. Well today when I cold started it I
> >noticed the smoke looked like it might have been bluish. Cool starts
> >still only do black smoke, and once started the car is fine (no smoke
> >even at WOT, I'm getting good times for a 380, and it idles and runs
> >like glass even with busted motor mounts and my starting problem has
> >gone away, I guess I was too lean). What does this mean? I mean, clearly
> >it means some seal is on it's way, but which seal would only burn oil on
> >cold start (oil level is exactly where it is when I changed the oil 2000
> >miles ago) and what's the reason behind my puff of black smoke on cool
> >starts?
> >Thanks,
> >Richard
> >The MB Coupes Website!
> >W126 SEC Mailing List
> >Postings remain property of MB Coupes, L.L.C.
>
>
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
>