[W126 Coupe] HELP! resistor vs. non resistor plugs

[Tom Oelsner]

Bellamy,
I have been told that it is valve seals.  However, I don't think the
mechanic checked compression.  The plugs that are the most fouled are the
front 3 plugs on the right (passenger) side.  Sometimes (1 out of 4-5
starts) on startup after the car has been sitting overnight, I get tapping
for a second or two.  It does not happen again later in the day.
Tom

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of Mister McGoo
Sent: Friday, September 23, 2005 10:47 AM
To: mbcoupes at mbcoupes.com
Subject: RE: [W126 Coupe] HELP! resistor vs. non resistor plugs


Tom;

Sorry, I didn't state that well.  The .032 is recommended.  Some people
believe that a wider gap will help delay fouling out if oil consumption is a
problem.  I'd suggest .035 if you want to try it, but not .045 because I
think you'll just be taking them all out again right away.  That's all.

Have you checked your compression?  Do you figure your problem is rings or
valves (valves or stem seals)?  Or has it happened just once and could be
the three (?) plugs themselves?

Depending on how much you drive, and how quickly the plugs foul,  you might
consider just having extra plugs and switch them out when performace
declines.  You CAN clean and gap the ones you take out and hold them as
spares again if you don't have access to new ones.  But generally spark
plugs are pretty cheap and the cost of always having a spare complete set is
nothing compared to the trouble of changing them.

-Bellamy


>From: "Tom Oelsner" <toelsner at mindspring.com>
>Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
>To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
>Subject: RE: [W126 Coupe] HELP! resistor vs. non resistor plugs
>Date: Thu, 22 Sep 2005 08:09:56 -0700
>
>Bellamy
>Why do you suggest .035 instead of .032 because of oil burning?
>Tom
>
>


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