Date:         Sat, 12 May 2007 16:47:01 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: Head Nuts Final Torque was: Head sealants??
Comments: To: insyncro@YAHOO.COM
Content-Type: text/plain; format=flowed

Since your are using sealants, you can not re-tourque using a torque wrench.
Since the sealant is eliminating any chance of the studs coming loose due to
vibration, ( which is nt an issue here), the only future looseness issue is
stud stretching or in reality, failure. VW did increase the torque to 41
ft/lbs di increase the spec to 41 ft/lbs, but the use of the Lok-tite
reduces the final torque for a given clamping load.  Yes the 37 is a 10%
reduction. Experimenting has shown that 41 ft/lbs results in lot of over
stretched and broken studs, especially when they are reused. There is
nothing worse than having a lower stud snap while you are on the road. The
smoke, the loss of power, and oh my gosh, all the coolant suddenly going
into the crankcase.

I have said in the past that any internal gasket leak is usually the result
of loose studs. Any engine that experiences this condition is a candidate to
have all the studs replaced. The outer gasket is not torque dependant as the
head does not clamp down on it tightly. The condition of the rubber and the
mating surfaces are the failure items here.

Dennis


>From: dylan friedman <insyncro@YAHOO.COM>
>Reply-To: dylan friedman <insyncro@YAHOO.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Head Nuts Final Torque was: Head sealants??
>Date: Sat, 12 May 2007 11:43:19 -0700
>
>my finals are 35lbs. so if I need to re torque I can go to 37lbs.
>
>df
>
>----- Original Message ----
>From: David Kao <dtkao0205@YAHOO.COM>
>To: vanagon@GERRY.VANAGON.COM
>Sent: Saturday, May 12, 2007 2:11:19 PM
>Subject: Re: Head Nuts Final Torque was: Head sealants??
>
>No doubt, over-torquing Can cause irreversible damages.
>So what is the correct final torque number?
>
>Can anyone further clarify the final Torque number on latest
>Bentley manual? Mine is probably too old with an outdated number
>of 25 ftlb (35Nm). Instruction sheet of Victor Reinz gasket set
>said 35 ftlb (50NM). Dennis said 37 ftlb (out of Bentley?).
>
>David
>
>--- dylan friedman <insyncro@yahoo.com> wrote:
>
> > over torquing the heads will crush the metal compression ring and ruin
>the resealing job.
> > i know from experience.
> > watch for bubbles in the overflow tank.
> >
> > the correct torque,
> > 518,
> > right stuff sealant.
> >
> > this combo has worked very well for me.
> >
> > dylan
>
>
>
>
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