[W126 Coupe] New vacuum rubber, idle control vale

[mbramel]

Thanks, I really appreciate it.

 

Wow 15ftlbs. Yeah, definitely was going tighter than that. 

 

No, and actually it seems to use very little oil at all. Everything works on
it

 

Thanks again

 

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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Dick Spellman
Sent: Sunday, August 02, 2009 8:43 PM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] New vacuum rubber, idle control vale

 

Name????

Just my 2 but here is what I would do...

Set the bad cylinder to TDC.

Drill to set depth and then Tap those threads using the Timesert or Helicoil
kit in situ.  

Suck any debris off the cylinder/piston top using a flexible hose dropped
onto the piston top area.

Go only to Mercedes dealer and get the 8 original factory plugs (they are
pre-gapped and with torque spec on the label)

These are typically tapered and torque to 21nM/15.5 ft lbs. 

Oil the threads as per usual.

Use a torque wrench, no guess work of any kind or the problem becomes far
worse!  

Forget any other comments on better plugs and so on as they do not apply. 

Just follow the original MB specs.

Sorry to hear you have this problem.

At 200k, have the heads been refurbished??

-\Dick

mbramel wrote: 

I bought a 87 560SEC black over grey last year. Always idled terribly, and I
mean terrible. It would rock from side to side. Put in new injector seals,
cups, new idle distribution hoses, and a lightly used idle control valve
from ebay. Runs wonderful now. It actually idles smoother than our 5 year
old chevy express van. However I have a different problem. I figured it
would be a good idea to spin the engine a few times without the plugs
installed incase anything had fallen into the cylinders. Well I had the
plugs out, did that. Yadda ya. Installing the plugs I was told to use a bit
more force and to stop babying it, that's what the crush washer is for. Well
I don't know what I did. But I know now there is a set of threads from a NGK
BP6ES (as per recommended) in the head and the read of the plug in my hand.
Not sure if I can JB weld this or what are your recommendations? The car has
200k on it.

 

Thank you 






 

 

 





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