[W126 Coupe] (no subject)

[mavris2 at comcast.net]

The only thing I would add is replace the copper crush washers if you have 
not.

Jason


----- Original Message ----- 
From: "Dick Spellman" <spell.yy at verizon.net>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Saturday, June 02, 2007 5:35 PM
Subject: Re: [W126 Coupe] (no subject)



> Correction as per Dan Landiss:  2.0 to 2.5 ft lbs.  A really torque.  You 

> can adjust it accordingly if you still have some seepage.  The point 

> being, if you over do it you'll defeat the purpose of the gasket.

>

> Dick

>

> Dick Spellman wrote:

>> 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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>>

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>>

>>

>

>

> The MB Coupes Website!

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

>