If you try to cut back a composite gasket you have a good chance of having the
thin copper face parts facing into the flame of combustion which is going
heat the copper red hot quickly, this will start pre-ignition and then
detonation. Result, dead engine. In a few words. DON'T DO IT.
Never be beaten by equipment
> From: Tylerpthompson@yahoo.com
> Date: Sat, 24 Nov 2012 08:59:06 -0700
> To: n197tr4@cs.com
> CC: fot@autox.team.net
> Subject: Re: [Fot] trt 3/4 head gasket
>
> I pulled the head off of mine a few mons back. If folks recall, I broke 7 of
8
> tops of the outer valve springs and one inner. I am fixing that and
checking
> geometry.
>
> I do have oversized valves and 89 bore, and I found my Payen A330 gasket
was
> burnt where the gasket was not ground back. My sleeves are not ground back
as
> well.
>
> Can you grind back the copper Payen gasket with no issues? I will be
> feathering back the sleeves as well.
>
> Also, does anyone know the correct valve spring height?
>
> Thx
>
> Ty
>
>
> Sent from my iPad
> (Please excuse any errors or typos)
>
> On Nov 15, 2012, at 7:41 PM, Joe Alexander <n197tr4@cs.com> wrote:
>
> > Ditto...Using Payen for several years now and has been one less thing to
> worry
> > about.
> >
> >
> >
> >
> > Joe Alexander
> >
> > Subject: Re: [Fot] trt 3/4 head gasket
> >
> >
> > Like Tony we use a stock Payen gasket notched to fit the larger valve
with
> no
> > problem. My take is that one must make sure the head & block are flat &
> true
> > &
> > properly installed.
> >
> > Sent from my iPhone
> >
> > On Nov 15, 2012, at 12:36 AM, Tony Drews <tony@tonydrews.com> wrote:
> >
> >> I use a stock composite gasket and will get a season out of it. I was
at
> > about 0.175 milled, am now at 0.130 after my last head gasket problem
> turned
> > out to be a collapsing combustion chamber in the head problem. I don't
> have
> > giant valves (they clear the 87 mm liners), so I notched the liner to
match
> > the "mickey ear" of the stock gasket so there was something supporting it
> on
> > one side in the pocket that disappeared. I put the seam side against the
> > liner then.
> >>
> >> Tony Drews
> >>
> >> At 12:18 PM 11/10/2012, KENMUN@aol.com wrote:
> >>> anyone having success with the stock composite head gasket on a milled
> >>> head. my head has been milled .150" and the intake valve pockets are
> gone.
> > i'm
> >>> not having much luck with the steel gasket.
> >>> thanks, ken m. tr 3 vintage racer.
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