[W126 Coupe] smoke on start up?

[Shayegan, Richard]

Cool. Is the tiny bit of leak-by the reason I get blow-by on my air
filter cover (just a tiny bit, so small I can't even guess how much it
is, basically the amount of liquid that comes out when you spit is
deposited onto my air filter cover over the course of a year).
Glad to know it's no worries since the money I had saved up to put my
plan (euro 500 + supercharger + no cats + no resonators + H&R's and
Bilsteins + 17 inch BBS's + releathered interior + repainted/rechromed
exterior) into action just went into a 15 month CD (Huzzah! Interest
rates are back).
Richard

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Mister McGoo
Sent: Thursday, October 06, 2005 2:21 AM
To: mbcoupes at mbcoupes.com
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.


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Postings remain property of MB Coupes, L.L.C.