healeys
[Top] [All Lists]

Re: [Healeys] A90 Head Update

To: Healeyguy <healeyguy@aol.com>
Subject: Re: [Healeys] A90 Head Update
From: Alan Seigrist <healey.nut@gmail.com>
Date: Wed, 3 Feb 2021 11:47:55 +0800
Cc: "healeys@autox.team.net" <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <CAFBXTk+h9B6VVmydsF05L_tUgV9C5awLyAt2dAP+iM1SFMnhRg@mail.gmail.com> <d55a6eda-b340-ec5c-7917-9fedd2dc0b54@comcast.net> <CAFBXTk+GxEC9aq=6My8Jj1BkJ-eTfKqcCJOvBFjLLKsCcdn1bA@mail.gmail.com> <918689923.1850406.1612320559311@mail.yahoo.com>
--===============7642607060801440607==

--0000000000008dbd7605ba6674b7

Hi Perry -

Yes, I retorqued it myself after a couple thousand miles.

Best,

Alan

On Wed, Feb 3, 2021 at 10:49 AM <healeyguy@aol.com> wrote:

> Alan
> Was the head retorqued after installed and run in? I realize it has been a
> long time so that info may not be available.
> Perry
>
>
> -----Original Message-----
> From: Alan Seigrist <healey.nut@gmail.com>
> To: Bob Spidell <bspidell@comcast.net>
> Cc: Healey list <healeys@autox.team.net>
> Sent: Tue, Feb 2, 2021 9:01 pm
> Subject: Re: [Healeys] A90 Head Update
>
> Hi Bob -
>
> This gasket was put on the car only about 5K miles ago if you can believe
> it, but the car sat for about 10 years afterwards...  I've checked both the
> head and deck with a rectifier (see pic), both are very nicely flat and do
> not need to go to the machinist.  Both are flat to within 1/1000 on the
> surface... which is less than the error on the rectifier!
>
> I have the previously removed very old copper gasket which I saved and it
> has no signs of gas leaking between cylinders compared to this newer gasket
> that I just removed.  I discovered a few things:
>
>    1. The old gasket is made with better quality, softer copper, and is
>    thicker than the newer gasket that was put on.  The old gasket that showed
>    no problems is 1.8mm thick after being installed, the new gasket that
>    failed is 1.5mm thick after being installed.  The old gasket is very
>    nicely marked as to orientation, directions, copper compression rings are
>    thicker, etc., etc.,  Clearly the older gasket was made to work in
>    circumstances where the mating surfaces weren't always perfectly flat.
>    2. I highly suspect the mechanics that installed the head last time
>    did not torque the head in the proper sequence, quite possibly working from
>    the outside in.
>    3. The head stud mount holes on the deck were raised a bit in couple
>    places and may have caused the head to deflect a little, possibly, but they
>    don't seem to have been enough to make a difference... I have already filed
>    those holes down.  Micheal Salter has told me to run a countersink to debur
>    the hole.
>
> It's a weird one, I think possibly a combination of all three issues
> above.  Let's see how she goes after I finish the job.  Ultimately one
> thing I learned is I cannot anymore rely on mechanics that I do not know
> well to do work on my car... I end up having to redo everything.
>
> Best,
>
> Alan
>
> On 2/1/2021 11:23 PM, Alan Seigrist wrote:
> > All -
> >
> > Got the head off.  Sure enough the gasket blew between 3&4 .  some
> > evidence of gas flow between 1&2 as well. Last pic is of me standing
> > in the engine compartment lifting the head off, just to make all of
> > you jealous ... :D
> >
> > Cheers,
> >
> > Alan
> >
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healey.nut@gmail.com
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healeyguy@aol.com
>
>

--0000000000008dbd7605ba6674b7
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Perry -<div><br></div><div>Yes, I retorqued it myself a=
fter a couple thousand miles.</div><div><br></div><div>Best,</div><div><br>=
</div><div>Alan</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" =
class=3D"gmail_attr">On Wed, Feb 3, 2021 at 10:49 AM &lt;<a href=3D"mailto:=
healeyguy@aol.com">healeyguy@aol.com</a>&gt; wrote:<br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex">
<div style=3D"color:black;font:10pt Arial,Helvetica,sans-serif">Alan
<div>Was the head retorqued after installed and run in? I realize it has be=
en a long time so that info may not be available.</div>

<div>Perry=C2=A0<br>
<br>
<br>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Alan Seigrist &lt;<a href=3D"mailto:healey.nut@gmail.com"; target=3D"_=
blank">healey.nut@gmail.com</a>&gt;<br>
To: Bob Spidell &lt;<a href=3D"mailto:bspidell@comcast.net"; target=3D"_blan=
k">bspidell@comcast.net</a>&gt;<br>
Cc: Healey list &lt;<a href=3D"mailto:healeys@autox.team.net"; target=3D"_bl=
ank">healeys@autox.team.net</a>&gt;<br>
Sent: Tue, Feb 2, 2021 9:01 pm<br>
Subject: Re: [Healeys] A90 Head Update<br>
<br>

<div id=3D"gmail-m_5841794668378181620yiv7555033341">
<div>
<div dir=3D"ltr">
<div dir=3D"ltr">Hi Bob -
<div><br clear=3D"none"></div>

<div>This gasket was put on the car only about 5K miles ago if you can beli=
eve it, but the car sat for about 10 years afterwards...=C2=A0 I&#39;ve che=
cked both the head and deck with a rectifier (see pic), both are very nicel=
y flat and do not need to go to the machinist.=C2=A0 Both are flat to withi=
n 1/1000 on the surface... which is less than the error on the rectifier!</=
div>

<div><br clear=3D"none"></div>

<div>I have the previously removed very old copper gasket which I saved and=
 it has no signs of gas leaking between cylinders compared to this newer ga=
sket that=C2=A0I just=C2=A0removed.=C2=A0 I discovered a few things:</div>

<div><ol><li>The old gasket is made with better quality, softer copper, and=
 is thicker than the newer gasket that was put on.=C2=A0 The old gasket tha=
t showed no problems is 1.8mm thick after being installed, the new gasket t=
hat failed is 1.5mm thick after being installed.=C2=A0 The old gasket is ve=
ry nicely=C2=A0marked as to orientation, directions, copper compression rin=
gs are thicker, etc., etc.,=C2=A0 Clearly the older gasket was made to work=
 in circumstances where the mating surfaces weren&#39;t always perfectly fl=
at.</li><li>I highly suspect the mechanics that installed the head last tim=
e did not torque the head in the proper sequence, quite possibly working fr=
om the outside in.=C2=A0=C2=A0</li><li>The head stud mount holes on the dec=
k were raised a bit in couple places and may have caused the head to deflec=
t a little, possibly, but they don&#39;t seem to have been enough to make a=
 difference... I have already filed those holes down.=C2=A0 Micheal Salter =
has told me to run a countersink to debur the hole.</li></ol>
<div>It&#39;s a weird one, I think possibly a combination of all three issu=
es above.=C2=A0 Let&#39;s see how she goes after I finish the job.=C2=A0 Ul=
timately one thing I learned is I cannot anymore rely on mechanics that I d=
o not know well to do work on my car... I end up having to redo everything.=
</div>

<div><br clear=3D"none"></div>

<div>Best,</div>
</div>

<div id=3D"gmail-m_5841794668378181620yiv7555033341yqtfd76764">
<div><br clear=3D"none"></div>

<div>Alan</div>
</div>
</div>

<div><blockquote style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<div id=3D"gmail-m_5841794668378181620yiv7555033341yqtfd46821">
On 2/1/2021 11:23 PM, Alan Seigrist wrote:<br clear=3D"none">
&gt; All -<br clear=3D"none">
&gt;<br clear=3D"none">
&gt; Got the head off.=C2=A0 Sure enough the gasket blew between 3&amp;4 . =
=C2=A0some <br clear=3D"none">
&gt; evidence of gas flow between 1&amp;2 as well. Last pic is of me standi=
ng <br clear=3D"none">
&gt; in the engine compartment lifting the head off, just to make all of <b=
r clear=3D"none">
&gt; you jealous ... :D<br clear=3D"none">
&gt;<br clear=3D"none">
&gt; Cheers,<br clear=3D"none">
&gt;<br clear=3D"none">
&gt; Alan<br clear=3D"none">
&gt;<br clear=3D"none">
<br clear=3D"none">
_______________________________________________<br clear=3D"none">
f=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.team.net=
/donate.html</a><br clear=3D"none">
<br clear=3D"none">
Archive: <a rel=3D"nofollow noopener noreferrer" shape=3D"rect" href=3D"htt=
p://www.team.net/pipermail/healeys" target=3D"_blank">http://www.team.net/p=
ipermail/healeys</a> <a rel=3D"nofollow noopener noreferrer" shape=3D"rect"=
 href=3D"http://autox.team.net/archive"; target=3D"_blank">http://autox.team=
.net/archive</a><br clear=3D"none">
<br clear=3D"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" href=3D"mailto:Heale=
ys@autox.team.net" target=3D"_blank">Healeys@autox.team.net</a><br clear=3D=
"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" href=3D"http://autox=
.team.net/mailman/listinfo/healeys" target=3D"_blank">http://autox.team.net=
/mailman/listinfo/healeys</a><br clear=3D"none">
<br clear=3D"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" href=3D"http://autox=
.team.net/mailman/options/healeys/healey.nut@gmail.com" target=3D"_blank">h=
ttp://autox.team.net/mailman/options/healeys/healey.nut@gmail.com</a>
<div id=3D"gmail-m_5841794668378181620yiv7555033341yqtfd98362"><br clear=3D=
"none">
<br clear=3D"none">
</div>
</blockquote></div>
</div>

<div id=3D"gmail-m_5841794668378181620yiv7555033341yqtfd50396">
</div>
</div>
</div>

<div id=3D"gmail-m_5841794668378181620yqtfd20565">_________________________=
______________________<br clear=3D"none">Support Team.Net <a shape=3D"rect"=
 href=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.team=
.net/donate.html</a><br clear=3D"none">Suggested annual donation=C2=A0 $12.=
75<br clear=3D"none"><br clear=3D"none">Archive: <a shape=3D"rect" href=3D"=
http://www.team.net/pipermail/healeys"; target=3D"_blank">http://www.team.ne=
t/pipermail/healeys </a><a shape=3D"rect" href=3D"http://autox.team.net/arc=
hive" target=3D"_blank">http://autox.team.net/archive</a><br clear=3D"none"=
><br clear=3D"none"><a shape=3D"rect" href=3D"mailto:Healeys@autox.team.net=
" target=3D"_blank">Healeys@autox.team.net</a><br clear=3D"none"><a shape=
=3D"rect" href=3D"http://autox.team.net/mailman/listinfo/healeys"; target=3D=
"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br clear=3D"non=
e"><br clear=3D"none">Unsubscribe/Manage: <a shape=3D"rect" href=3D"http://=
autox.team.net/mailman/options/healeys/healeyguy@aol.com" target=3D"_blank"=
>http://autox.team.net/mailman/options/healeys/healeyguy@aol.com</a><br cle=
ar=3D"none"><br clear=3D"none"></div>
</div>
</div>
</div>
</blockquote></div>

--0000000000008dbd7605ba6674b7--

--===============7642607060801440607==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive

Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys



--===============7642607060801440607==--

<Prev in Thread] Current Thread [Next in Thread>