[W126 Coupe] (no subject)

[Eddie]

I thought you are supposed to torque to 15 lbs, drive the car and THEN
torque it higher?  Somehow I remember it's 2 steps to do it, and the initial
torque is REALLY REALLY low?

Edward

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Dick Spellman
Sent: Saturday, June 02, 2007 8:41 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] (no subject)

How are you securing the cylinder head cover?  Are you using a torque 
wrench to 20-25 ft lbs (as I recall the spec is right in this range) or 
are you just cranking these cover bolts down until they bottom out so to 
speak?  Over tightening of the covers could have resulted in a warped or 
cracked cover.  Try placing the cover on a known flat surface to see if 
it's got a significant lift or uneven surface.  Personally, I'd 
reinstall the gasket using a torque wrench and do cross bolt tightening 
from inside to outer where you say this is definitely a valve cover 
gasket issue.  No need to stage torque just go to 20-25 starting at a 
center cover bolt going criss-cross until all are torqued to spec.  If 
you still have a leak then with caution proceed with a gasket maker 
brush on application to the head and base of rubber gasket in the 
trouble spot only.

There is no need nor does MB recommend  any kind of sealant on that 
rubber cover gasket.  You could use a brush on gasket maker as a last 
resort but, do not use any kind of high temp silicone.  If that sealant 
were to bead up to the inside of the rubber seal and break off you could 
have more serious problems than a small oil leak.

Are you certain the valve cover has no cracks of any kind?  Does the 
mating surface on the head have any kind of indentation or blemish on 
the surface?  And using a spray cleaner (like brake cleaner) and then 
observing the area a while later you are absolutely certain it's the 
rubber seal and not the head gasket that's the next mating surface down 
from there where head and block meet?

Dick

JohnJayKimrey1 at aol.com wrote:

> Dear bellamy:

> No, it is the valve cover/gasket. I have removed and reinstalled two 

> new gaskets and still have the leak between the rubber seal and alum. 

> head.

>

>

>

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