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Blocking some passages may have been done to balance the cooling between ho=
tter and cooler areas in the block. A 4 psi cap was probably considered suf=
ficient at the time because the engine was intended to run at a lower tempe=
rature. Increasing the system pressure raises the coolant boiling point, bu=
t also increases stress on hoses, gaskets and seals. I think the thermostat=
s used were in the 160 degree F range. Under the conditions that were antic=
ipated they probably tried to minimize those stresses for warranty reasons.=
More recent experience says that engines run more efficiently at higher te=
mperatures. Most modern engines run at around 210 degrees F. My 100 runs be=
st with a coolant temperature of about 180 degrees F. I haven=92t experienc=
ed any problems in that temperature range although if it gets anywhere abov=
e 190 degrees F it will vapor lock.
________________________________
From: Healeys <healeys-bounces@autox.team.net> on behalf of Michael Salter =
via Healeys <healeys@autox.team.net>
Sent: Wednesday, February 23, 2022 8:22 PM
To: Hank Leach <gradea1@charter.net>
Cc: healeys@autox.team.net <healeys@autox.team.net>; Steven Kingsbury <airt=
ightproductions@me.com>
Subject: Re: [Healeys] Head Gasket
For what it's worth, I always have the block skimmed on 100 engine rebuilds=
.
To date most if not all seem to have a low area between 2 & 3.
Touch wood, I've yet to encounter head gasket problems or even the very com=
mon "seepage" issues in the area of the engine number tag.
Fingers and toes crossed.
M
On Wed., Feb. 23, 2022, 3:02 p.m. Henry G Leach via Healeys, <healeys@autox=
Has anyone ever stuck a magnet to a Payen copper gasket? I did-its a steel =
gasket with a copper coating. There is a real engineering issue with the 26=
60cc block and I am not sure why it is configured as it is. There may have =
been a study done on the engine's water flow way back then and some modific=
ations made for cooling. It does not add up or make sense, however.
So, look at this head and the gasket and then the block. Why are the water =
passages reduced on the jackets shown? Then too, why is there no passage i=
n one area marked that is actually open for water on the head and gasket? T=
his is one "hot spot" found between 2-3 cylinders when read with a heat gun=
.
I was tempted to drill out the opening in the block before re-assembling my=
head, but thought better of it. I would never question engineering technol=
ogy of BMC. Modern day replacements have that same area blocked. Never-the-=
less, can anyone explain this concept to me; the reason for this and a 4lb.=
radiator cap. This engine needs water, lots of it to keep it cool. Why res=
trict it? Then too, aluminum has its own set of issues that may/may not im=
prove the cooling capacity of some old, thick cast iron block. Maybe throwi=
ng money at it has an effect. Hank
-----------------------------------------
To: "Steven Kingsbury"
Cc: "Healey Mail List"
Sent: Tuesday February 22 2022 12:23:07PM
Subject: RE: [Healeys] Head Gasket Woes Part Two
Steven-that's a real heavy piston at .060 (compression ratio 9:1?) Was ther=
e any defect in head prior to assembly? Magnafluxed? There is an outfit Mid=
west Cylinder Head that can repair that for about $500, or else is on to De=
nis Welch for about $4K.
I just had my head off and checked-they shaved .003 to get it flat. Fingers=
crossed-head gasket was not blown, but water in oil. I'm hoping it was wat=
er intrusion from rocker studs. Hank
-----------------------------------------
From: "Steven Kingsbury via Healeys"
To: "Healey Mail List"
Cc:
Sent: Tuesday February 22 2022 11:28:21AM
Subject: [Healeys] Head Gasket Woes Part Two
Luckily the pistons weren't frozen, nor the rings in the pistons, but when =
I turned the head over to inspect, I got the really bad news.
[INBOX530788498d9fa86f504913dab139d4d9ef6]
Oh well. I guess some JB Weld might hold!? Ha! Damn it Jim.
S
_______________________________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e/healeys
http://autox.team.net/mailman/listinfo/healeys
lter@gmail.com
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<div>Blocking some passages may have been done to balance the cooling betwe=
en hotter and cooler areas in the block. A 4 psi cap was probably considere=
d sufficient at the time because the engine was intended to run at a lower =
temperature. Increasing the system
pressure raises the coolant boiling point, but also increases stress on ho=
ses, gaskets and seals. I think the thermostats used were in the 160 degree=
F range. Under the conditions that were anticipated they probably tried to=
minimize those stresses for warranty
reasons. More recent experience says that engines run more efficiently at =
higher temperatures. Most modern engines run at around 210 degrees F. My 10=
0 runs best with a coolant temperature of about 180 degrees F. I haven=92t =
experienced any problems in that temperature
range although if it gets anywhere above 190 degrees F it will vapor lock.=
</div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Healeys <healeys-b=
ounces@autox.team.net> on behalf of Michael Salter via Healeys <heale=
ys@autox.team.net><br>
<b>Sent:</b> Wednesday, February 23, 2022 8:22 PM<br>
<b>To:</b> Hank Leach <gradea1@charter.net><br>
<b>Cc:</b> healeys@autox.team.net <healeys@autox.team.net>; Steven Ki=
ngsbury <airtightproductions@me.com><br>
<b>Subject:</b> Re: [Healeys] Head Gasket</font>
<div> </div>
</div>
<div>
<div dir=3D"auto">For what it's worth, I always have the block skimmed on 1=
00 engine rebuilds.
<div dir=3D"auto">To date most if not all seem to have a low area between 2=
& 3.</div>
<div dir=3D"auto">Touch wood, I've yet to encounter head gasket problems or=
even the very common "seepage" issues in the area of the engine =
number tag.</div>
<div dir=3D"auto">Fingers and toes crossed.</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">M</div>
</div>
<br>
<div class=3D"x_gmail_quote">
<div dir=3D"ltr" class=3D"x_gmail_attr">On Wed., Feb. 23, 2022, 3:02 p.m. H=
enry G Leach via Healeys, <<a href=3D"mailto:healeys@autox.team.net";>hea=
leys@autox.team.net</a>> wrote:<br>
</div>
<blockquote class=3D"x_gmail_quote" style=3D"margin:0 0 0 .8ex; border-left=
:1px #ccc solid; padding-left:1ex">
<div>Has anyone ever stuck a magnet to a Payen <b>copper</b> gasket? I did-=
its a steel gasket with a copper coating. There is a real engineering issue=
with the 2660cc block and I am not sure why it is configured as it is. The=
re may have been a study done on
the engine's water flow way back then and some modifications made for cool=
ing. It does not add up or make sense, however.
<div><br>
</div>
<div>So, look at this head and the gasket and then the block. Why are the w=
ater passages reduced on the jackets shown? Then too, why is there no=
passage in one area marked that is actually open for water on the head<b> =
and</b> gasket? This is one "hot spot"
found between 2-3 cylinders when read with a heat gun.</div>
<div><br>
</div>
<div>I was tempted to drill out the opening in the block before re-assembli=
ng my head, but thought better of it. I would never question engineering te=
chnology of BMC. Modern day replacements have that same area blocked. Never=
-the-less, can anyone explain this
concept to me; the reason for this and a 4lb. radiator cap. This engine ne=
eds water, lots of it to keep it cool. Why restrict it? Then too, alu=
minum has its own set of issues that may/may not improve the cooling capaci=
ty of some old, thick cast iron block.
Maybe throwing money at it has an effect. Hank<br>
<div></div>
<p>-----------------------------------------</p>
From: <a href=3D"mailto:gradea1@charter.net"; target=3D"_blank" rel=3D"noref=
errer">gradea1@charter.net</a><br>
To: "Steven Kingsbury"<br>
Cc: "Healey Mail List"<br>
Sent: Tuesday February 22 2022 12:23:07PM<br>
Subject: RE: [Healeys] Head Gasket Woes Part Two<br>
<br>
Steven-that's a real heavy piston at .060 (compression ratio 9:1?) Was ther=
e any defect in head prior to assembly? Magnafluxed? There is an outfit Mid=
west Cylinder Head that can repair that for about $500, or else is on to De=
nis Welch for about $4K.
<div><br>
</div>
<div>I just had my head off and checked-they shaved .003 to get it flat. Fi=
ngers crossed-head gasket was not blown, but water in oil. I'm hoping it wa=
s water intrusion from rocker studs. Hank</div>
<div><br>
<div></div>
<p>-----------------------------------------</p>
From: "Steven Kingsbury via Healeys"<br>
To: "Healey Mail List"<br>
Cc:<br>
Sent: Tuesday February 22 2022 11:28:21AM<br>
Subject: [Healeys] Head Gasket Woes Part Two<br>
<br>
<div>Luckily the pistons weren't frozen, nor the rings in the pistons, but =
when I turned the head over to inspect, I got the really bad news.<br>
</div>
<div><br>
</div>
<div><img alt=3D"INBOX530788498d9fa86f504913dab139d4d9ef6" src=3D"http:///i=
ndex.php/inbox/attachment/filenameOriginal/PXL_20220221_213449711.jpg/filen=
amefs/INBOX530788498d9fa86f504913dab139d4d9ef69b"><br>
</div>
<div><br>
</div>
<div>Oh well. I guess some JB Weld might hold!? Ha! Damn it Jim.<br>
</div>
<div>S</div>
</div>
</div>
</div>
_______________________________________________<br>
rer noreferrer" target=3D"_blank">
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noreferre=
r noreferrer" target=3D"_blank">
http://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.net/=
archive/healeys" rel=3D"noreferrer noreferrer" target=3D"_blank">
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank" rel=3D"noreferr=
er">Healeys@autox.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noreferre=
r noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/heal=
eys</a><br>
<br>
s/michaelsalter@gmail.com" rel=3D"noreferrer noreferrer" target=3D"_blank">
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><b=
r>
<br>
</blockquote>
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