[Fot] Re-torquing a cylinder head - GT6

[Bill Dentinger]

Mordy...

You kinda lost me after the second sentence.  All this inhomogeneous talk tends to disturb me.  

I don't think I'm homophobic.  I hope not.  

But when these terms come up...I don't know...I get nervous.

Bill Dentinger

PS And Happy New Year to all FOTers of the Jewish persuasion.  The rest of us have to wait almost four more months.



-----Original Message-----
From: Mordy Dunst via Fot <fot at autox.team.net>
To: fot <fot at autox.team.net>
Sent: Wed, Sep 20, 2017 3:03 am
Subject: Re: [Fot] Re-torquing a cylinder head - GT6

Composite Fiber gasket material has internal micro gas pockets.  Depends on the quality and repeatability of the original gasket material.   When heated the gas expands and seeps out from areas of least resistance.  Perhaps after a few heat / cool cycles all those  internal gas pockets that were present when New have been vacated.  The gasket then creeps upon itself and becomes imperceptibly thinner.  Hence the original axial tension is now reduced.  Perhaps some parts of the gasket are more inhomogeneous than others and leads to a mismatch in "torque".  That's the nature of an inhomogeneous materials.  Anyways that's how I put it together.  Best MordyMDunst Headgasket.com 626.358.1616 Fax 626.628.3777 Triple R Munitions, Inc 626.201.9471 T FFL 6,7 SOT 2On Tuesday, September 19, 2017, Scott Janzen via Fot <fot at autox.team.net> wrote:I’m adjusting valves after the last race weekend.  For whatever reason, I put the torque wrench on a couple of the head bolts - and found maybe 90 degrees of movement on the few nuts I checked. I run a Payen head gasket - composite with a metal ring at the combustion chamber.Should I:loosen one nut at a time, lube with moly as provided by ARP, and retorque to ARP spec;tighten from the current position to ARP spec (75 ft-lb)do nothingThe engine has probably four race weekends on it.  I can honestly say I have never re-torqued Payen gaskets before, but I have also re-checked the torque on other gaskets and not found any movement._______________________________________________fot at autox.team.nethttp://www.fot-racing.comDonate: http://www.team.net/donate.htmlArchive: http://www.team.net/archiveForums: http://www.team.net/forumsUnsubscribe/Manage: http://autox.team.net/mailman/options/fot/gasket.works@gte.net_______________________________________________fot@autox.team.nethttp://www.fot-racing.comDonate: http://www.team.net/donate.htmlArchive: http://www.team.net/archiveForums: http://www.team.net/forumsUnsubscribe/Manage: http://autox.team.net/mailman/options/fot/billdentin@aol.com
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