healeys
[Top] [All Lists]

Re: [Healeys] A90 Head Update

To: "healey.nut@gmail.com" <healey.nut@gmail.com>, "bspidell@comcast.net" <bspidell@comcast.net>
Subject: Re: [Healeys] A90 Head Update
From: healeyguy--- via Healeys <healeys@autox.team.net>
Date: Wed, 3 Feb 2021 02:49:19 +0000 (UTC)
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> x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36 Edg/88.0.705.56
--===============0020538095382756002==
        boundary="----=_Part_1850405_688920198.1612320559309"

------=_Part_1850405_688920198.1612320559309
Content-Transfer-Encoding: quoted-printable

AlanWas the head retorqued after installed and run in? I realize it has bee=
n a long time so that info may not be available.Perry=C2=A0


-----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 i=
t, but the car sat for about 10 years afterwards...=C2=A0 I've checked both=
 the head and deck with a rectifier (see pic), both are very nicely flat an=
d do not need to go to the machinist.=C2=A0 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 h=
as no signs of gas leaking between cylinders compared to this newer gasket =
that=C2=A0I just=C2=A0removed.=C2=A0 I discovered a few things:  =20
   - The old gasket is made with better quality, softer copper, and is thic=
ker than the newer gasket that was put on.=C2=A0 The old gasket that showed=
 no problems is 1.8mm thick after being installed, the new gasket that fail=
ed is 1.5mm thick after being installed.=C2=A0 The old gasket is very nicel=
y=C2=A0marked as to orientation, directions, copper compression rings are t=
hicker, etc., etc.,=C2=A0 Clearly the older gasket was made to work in circ=
umstances where the mating surfaces weren't always perfectly flat.
   - I highly suspect the mechanics that installed the head last time did n=
ot torque the head in the proper sequence, quite possibly working from the =
outside in.=C2=A0=C2=A0
   - The head stud mount holes on the deck were raised a bit in couple plac=
es 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 th=
ose holes down.=C2=A0 Micheal Salter has told me to run a countersink to de=
bur the hole.
It's a weird one, I think possibly a combination of all three issues above.=
=C2=A0 Let's see how she goes after I finish the job.=C2=A0 Ultimately one =
thing I learned is I cannot anymore rely on mechanics that I do not know we=
ll 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.=C2=A0 Sure enough the gasket blew between 3&4 . =C2=A0s=
ome=20
> evidence of gas flow between 1&2 as well. Last pic is of me standing=20
> in the engine compartment lifting the head off, just to make all of=20
> you jealous ... :D
>
> Cheers,
>
> Alan
>

_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e

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

t@gmail.com


_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e

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

@aol.com


------=_Part_1850405_688920198.1612320559309
Content-Transfer-Encoding: quoted-printable


<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&nbsp;<br>
<br>
<br>

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

<div id=3D"yiv7555033341">
<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...&nbsp; I've checked=
 both the head and deck with a rectifier (see pic), both are very nicely fl=
at and do not need to go to the machinist.&nbsp; Both are flat to within 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&nbsp;I just&nbsp;removed.&nbsp; 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.&nbsp; 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.&nbsp; The old gasket is ve=
ry nicely&nbsp;marked as to orientation, directions, copper compression rin=
gs are thicker, etc., etc.,&nbsp; Clearly the older gasket was made to work=
 in circumstances where the mating surfaces weren't always perfectly flat.<=
/li><li>I highly suspect the mechanics that installed the head last time di=
d not torque the head in the proper sequence, quite possibly working from t=
he outside in.&nbsp;&nbsp;</li><li>The head stud mount holes on the deck we=
re 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 differe=
nce... I have already filed those holes down.&nbsp; Micheal Salter has told=
 me to run a countersink to debur the hole.</li></ol>
<div>It's a weird one, I think possibly a combination of all three issues a=
bove.&nbsp; Let's see how she goes after I finish the job.&nbsp; Ultimately=
 one thing I learned is I cannot anymore rely on mechanics that I do not kn=
ow 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 class=3D"yiv7555033341yqt4335541407" id=3D"yiv7555033341yqtfd76764">
<div><br clear=3D"none"></div>

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

<div class=3D"yiv7555033341gmail_quote"><blockquote class=3D"yiv7555033341g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex;">
<div class=3D"yiv7555033341yqt4335541407" id=3D"yiv7555033341yqtfd46821">
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.&nbsp; Sure enough the gasket blew between 3&amp;4 . =
&nbsp;some <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">
get=3D"_blank" href=3D"http://www.team.net/donate.html";>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" target=3D"_=
blank" href=3D"http://www.team.net/pipermail/healeys";>http://www.team.net/p=
ipermail/healeys</a> <a rel=3D"nofollow noopener noreferrer" shape=3D"rect"=
 target=3D"_blank" href=3D"http://autox.team.net/archive";>http://autox.team=
.net/archive</a><br clear=3D"none">
<br clear=3D"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:He=
aleys@autox.team.net" target=3D"_blank" href=3D"mailto:Healeys@autox.team.n=
et">Healeys@autox.team.net</a><br clear=3D"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" target=3D"_blank" hr=
ef=3D"http://autox.team.net/mailman/listinfo/healeys";>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" target=3D"_blank" hr=
ef=3D"http://autox.team.net/mailman/options/healeys/healey.nut@gmail.com";>h=
ttp://autox.team.net/mailman/options/healeys/healey.nut@gmail.com</a>
<div class=3D"yiv7555033341yqt4335541407" id=3D"yiv7555033341yqtfd98362"><b=
r clear=3D"none">
<br clear=3D"none">
</div>
</blockquote></div>
</div>

<div class=3D"yiv7555033341yqt4335541407" id=3D"yiv7555033341yqtfd50396">
</div>
</div>
</div>

<div class=3D"yqt4335541407" id=3D"yqtfd20565">____________________________=
___________________<br clear=3D"none">Support Team.Net <a shape=3D"rect" hr=
ef=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.team.ne=
t/donate.html</a><br clear=3D"none">Suggested annual donation&nbsp; $12.75<=
br clear=3D"none"><br clear=3D"none">Archive: <a shape=3D"rect" href=3D"htt=
p://www.team.net/pipermail/healeys" target=3D"_blank">http://www.team.net/p=
ipermail/healeys </a><a shape=3D"rect" href=3D"http://autox.team.net/archiv=
e" target=3D"_blank">http://autox.team.net/archive</a><br clear=3D"none"><b=
r clear=3D"none"><a shape=3D"rect" ymailto=3D"mailto:Healeys@autox.team.net=
" href=3D"mailto:Healeys@autox.team.net";>Healeys@autox.team.net</a><br clea=
r=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"none"><br clear=3D"none">Unsubscribe/Manage: <a shape=3D"re=
ct" 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 clear=3D"none"><br clear=3D"none"></div>
</div>
</div>
</div>

------=_Part_1850405_688920198.1612320559309--

--===============0020538095382756002==
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



--===============0020538095382756002==--

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