Subject: Re: [Healeys] Hardened seats in a cast iron 100 head

From: josef-eckert--- via Healeys <[email-masked]>
Date: Sun, 25 Aug 2024 17:35:37 +0200 (CEST)

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Hi Michael,

I wouldn`t do it again! I nlet  it done on one of my cylinder heads and=20
cracks was the result when we pressed them in.

I still have a head which is crack free. But its on the shelf in my=20
storage. In the car is an aluminium head.

=20

Josef Eckert

K=C3=B6nigswinter/Germany

=20

=20

=20

=20

-----Original-Nachricht-----

Betreff: [Healeys] Hardened seats in a cast iron 100 head

Datum: 2024-08-25T17:14:28+0200

Von: "Michael Salter" <[email-masked]>

An: "[email-masked]" <[email-masked]>

=20

=20

=20

I am still using cast iron heads on both my 100's. Amazingly neither have=
=20
serious cracks as are so common on these.
I am really picky and don't particularly like the different sound that a=20
100 engine with an aluminium head makes so would like to continue using=20
these cast iron ones.=20
I'm contemplating installing hardened seats in one.=20
Hase anyone done this successfully?

=20

=EF=BB=BF
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=3DUTF-8"/><title></title></head><body><p><span style=3D"font-family:arial,=
helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Hi =
Michael,<br></span></p>
<p><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">I wouldn`t do it again! I nlet&nbsp; it do=
ne on one of my cylinder heads and cracks was the result when we pressed th=
em in.</span></p>
<p><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">I still have a head which is crack free. B=
ut its on the shelf in my storage. In the car is an aluminium head.</span><=
/p>
<p>&nbsp;</p>
<p><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">Josef Eckert</span></p>
<p><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">K&ouml;nigswinter/Germany</span></p>
<p><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">&nbsp;</span></p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>-----Original-Nachricht-----</p>
<p>Betreff: [Healeys] Hardened seats in a cast iron 100 head</p>
<p>Datum: 2024-08-25T17:14:28+0200</p>
<p>Von: "Michael Salter" &lt;[email-masked]&gt;</p>
<p>An: "[email-masked]" &lt;[email-masked]&gt;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div dir=3D"auto">I am still using cast iron heads on both my 100's. Amazin=
gly neither have serious cracks as are so common on these.
<div dir=3D"auto">I am really picky and don't particularly like the differe=
nt sound that a 100 engine with an aluminium head makes so would like to co=
ntinue using these cast iron ones.&nbsp;</div>
<div dir=3D"auto">I'm contemplating installing hardened seats in one.&nbsp;=
</div>
<div dir=3D"auto">Hase anyone done this successfully?</div>
</div>
</div>
<p>&nbsp;</p>=EF=BB=BF</body></html>
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From: <[email-masked]>
Date: Sun, 25 Aug 2024 09:53:21 -0700

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Michael:
 
I have done it successfully on my BJ8 head, which admittedly might be a dif=
ferent kettle of fish than the 100 head.
 
In the mid 80=E2=80=99s =E2=80=93 at the time that leaded fuel was being ph=
ased out, we discovered a crack between 2 adjacent valve seats when doing t=
he engine=E2=80=99s 1st rebuild.  It needed those 2 seats done, and since e=
veryone was worried about what unleaded fuel would do to our engines, I mad=
e the decision to install hardened seats on all 12.  I started the engine o=
ut on unleaded fuel, and never did run leaded.  Normal valves =E2=80=93 har=
dened were not available at that moment.
 
The engine ran beautifully for approx. the next 100,000 miles, at which poi=
nt we did another rebuild in conjunction with a ground up restoration.  Whe=
n the engine was taken apart, very little wear was evident in the head =E2=
=80=93 the valves were still good, only needed a normal careful grind.  We =
were pretty surprised that the head looked that good after that mileage.  N=
ote also that sintered bronze valve guides were installed as well =E2=80=93=
 apparently a no no according to some people.  They must have been sized pe=
rfectly because there was no apparent wear to either the guides or the valv=
e stems, and they were left as they were (other than the grind).  The 2nd r=
ebuild now has appox 25,000 KM=E2=80=99s on it with no issues.  It=E2=80=99=
s a sweet running engine in stock form.  (yes =E2=80=93 I scored an OE  met=
ric speedo head several years ago and run it just to be obtuse!)
 
Earl Kagna
Victoria, BC
BT7, BJ8

From: Healeys <[email-masked]> On Behalf Of Michael Salter
Sent: Sunday, August 25, 2024 7:44 AM
To: [email-masked]
Subject: [Healeys] Hardened seats in a cast iron 100 head
 
I am still using cast iron heads on both my 100's. Amazingly neither have s=
erious cracks as are so common on these.
I am really picky and don't particularly like the different sound that a 10=
0 engine with an aluminium head makes so would like to continue using these=
 cast iron ones. 
I'm contemplating installing hardened seats in one. 
Hase anyone done this successfully?

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
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<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
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<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
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<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
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<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
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<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
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<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
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<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
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<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
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<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
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<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
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<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
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<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
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<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
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<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
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<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3D"#0563C1=
" vlink=3D"#954F72" style=3D'tab-interval:.5in;word-wrap:break-word'><div c=
lass=3DWordSection1><p class=3DMsoNormal><span style=3D'font-size:14.0pt;ms=
o-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family=
:Calibri;mso-bidi-font-family:"Times New Roman"'>Michael:<o:p></o:p></span>=
</p><p class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bidi-font-size=
:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bid=
i-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><p class=3DMso=
Normal><span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0pt;mso-ascii-=
font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Tim=
es New Roman"'>I have done it successfully on my BJ8 head, which admittedly=
 might be a different kettle of fish than the 100 head.<o:p></o:p></span></=
p><p class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNo=
rmal><span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0pt;mso-ascii-fo=
nt-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times=
 New Roman"'>In the mid 80=E2=80=99s =E2=80=93 at the time that leaded fuel=
 was being phased out, we discovered a crack between 2 adjacent valve seats=
 when doing the engine=E2=80=99s 1<sup>st</sup> rebuild.<span style=3D'mso-=
spacerun:yes'>=C2=A0 </span>It needed those 2 seats done, and since everyon=
e was worried about what unleaded fuel would do to our engines, I made the =
decision to install hardened seats on all 12.<span style=3D'mso-spacerun:ye=
s'>=C2=A0 </span>I started the engine out on unleaded fuel, and never did r=
un leaded.<span style=3D'mso-spacerun:yes'>=C2=A0 </span>Normal valves =E2=
=80=93 hardened were not available at that moment.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0pt=
;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-=
family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal>=
<span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-fa=
mily:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New =
Roman"'>The engine ran beautifully for approx. the next 100,000 miles, at w=
hich point we did another rebuild in conjunction with a ground up restorati=
on.<span style=3D'mso-spacerun:yes'>=C2=A0 </span>When the engine was taken=
 apart, very little wear was evident in the head =E2=80=93 the valves were =
still good, only needed a normal careful grind.<span style=3D'mso-spacerun:=
yes'>=C2=A0 </span>We were pretty surprised that the head looked that good =
after that mileage.<span style=3D'mso-spacerun:yes'>=C2=A0 </span>Note also=
 that sintered bronze valve guides were installed as well =E2=80=93 apparen=
tly a no <span class=3DSpellE>no</span> according to some people.<span styl=
e=3D'mso-spacerun:yes'>=C2=A0 </span>They must have been sized perfectly be=
cause there was no apparent wear to either the guides or the valve stems, a=
nd they were left as they were (other than the grind).<span style=3D'mso-sp=
acerun:yes'>=C2=A0 </span>The 2<sup>nd</sup> rebuild now has <span class=3D=
SpellE>appox</span> 25,000 KM=E2=80=99s on it with no issues.<span style=3D=
'mso-spacerun:yes'>=C2=A0 </span>It=E2=80=99s a sweet running engine in sto=
ck form.<span style=3D'mso-spacerun:yes'>=C2=A0 </span>(yes =E2=80=93 I sco=
red an OE <span style=3D'mso-spacerun:yes'>=C2=A0</span>metric speedo head =
several years ago and run it just to be obtuse!)<o:p></o:p></span></p><p cl=
ass=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0pt;m=
so-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-fa=
mily:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><s=
pan style=3D'font-size:14.0pt;mso-ascii-font-family:Calibri;mso-fareast-fon=
t-family:"Times New Roman";mso-hansi-font-family:Calibri;mso-bidi-font-fami=
ly:"Times New Roman";mso-no-proof:yes'>Earl Kagna<o:p></o:p></span></p><p c=
lass=3DMsoNormal><span style=3D'font-size:14.0pt;mso-ascii-font-family:Cali=
bri;mso-fareast-font-family:"Times New Roman";mso-hansi-font-family:Calibri=
;mso-bidi-font-family:"Times New Roman";mso-no-proof:yes'>Victoria, BC<o:p>=
</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-a=
scii-font-family:Calibri;mso-fareast-font-family:"Times New Roman";mso-hans=
i-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-no-proof:y=
es'>BT7, BJ8<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-=
size:14.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-han=
si-font-family:Calibri;mso-bidi-font-family:"Times New Roman"'><o:p>&nbsp;<=
/o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bi=
di-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Cal=
ibri;mso-bidi-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><p=
 class=3DMsoNormal><span style=3D'font-size:14.0pt;mso-bidi-font-size:11.0p=
t;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font=
-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><div style=3D'border=
:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3D=
MsoNormal><b><span style=3D'mso-fareast-font-family:"Times New Roman"'>From=
:</span></b><span style=3D'mso-fareast-font-family:"Times New Roman"'> Heal=
eys &lt;[email-masked]&gt; <b>On Behalf Of </b>Michael Salt=
er<br><b>Sent:</b> Sunday, August 25, 2024 7:44 AM<br><b>To:</b> healeys@au=
tox.team.net<br><b>Subject:</b> [Healeys] Hardened seats in a cast iron 100=
 head<o:p></o:p></span></p></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p>=
<div><p class=3DMsoNormal>I am still using cast iron heads on both my 100's=
=2E Amazingly neither have serious cracks as are so common on these.<o:p></=
o:p></p><div><p class=3DMsoNormal>I am really picky and don't particularly =
like the different sound that a 100 engine with an aluminium head makes so =
would like to continue using these cast iron ones.&nbsp;<o:p></o:p></p></di=
v><div><p class=3DMsoNormal>I'm contemplating installing hardened seats in =
one.&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal>Hase anyone done t=
his successfully?<o:p></o:p></p></div></div></div><div id=3D"DAB4FAD8-2DD7-=
40BB-A1B8-4E2AA1F9FDF2"><br /><table style=3D"border-top: 1px solid #D3D4DE=
;"><tr><td style=3D"width: 55px; padding-top: 13px;"><a href=3D"https://www=
=2Eavast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&utm_campaign=3D=
sig-email&utm_content=3Demailclient" target=3D"_blank"><img src=3D"https://=
s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-orange-anima=
ted-no-repeat-v1.gif" alt=3D"" width=3D"46" height=3D"29" style=3D"width: 4=
6px; height: 29px;"/></a></td><td style=3D"width: 470px; padding-top: 12px;=
 color: #41424e; font-size: 13px; font-family: Arial, Helvetica, sans-serif=
; line-height: 18px;">Virus-free.<a href=3D"https://www.avast.com/sig-email=
?utm_medium=3Demail&utm_source=3Dlink&utm_campaign=3Dsig-email&utm_content=
=3Demailclient" target=3D"_blank" style=3D"color: #4453ea;">www.avast.com</=
a></td></tr></table><a href=3D"#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width=
=3D"1" height=3D"1"> </a></div></body></html>
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[email-masked]

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---

From: Bob Spidell via Healeys <[email-masked]>
Date: Mon, 26 Aug 2024 07:43:18 -0700

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My dad had our BN2/100M's head redone--valves, guides, etc.--by a local 
speed shop we trust (the machinist is a meticulous Kiwi who Dad said got 
really excited when he saw 'Weslake' cast in the head). Unfortunately, 
Dad isn't around to ask, but they almost certainly installed hardened 
exhaust valve seats; it's been SOP since, well, since lead was removed 
from gas. No issues, and I had it out on the road a couple weeks ago.

On 8/25/2024 7:44 AM, Michael Salter wrote:
> I am still using cast iron heads on both my 100's. Amazingly neither 
> have serious cracks as are so common on these.
> I am really picky and don't particularly like the different sound that 
> a 100 engine with an aluminium head makes so would like to continue 
> using these cast iron ones.

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  <body>
    My dad had our BN2/100M's head redone--valves, guides, etc.--by a
    local speed shop we trust (the machinist is a meticulous Kiwi who
    Dad said got really excited when he saw 'Weslake' cast in the head).
    Unfortunately, Dad isn't around to ask, but they almost certainly
    installed hardened exhaust valve seats; it's been SOP since, well,
    since lead was removed from gas. No issues, and I had it out on the
    road a couple weeks ago. <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 8/25/2024 7:44 AM, Michael Salter
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="auto">I am still using cast iron heads on both my 100's.
        Amazingly neither have serious cracks as are so common on these.
        <div dir="auto">I am really picky and don't particularly like
          the different sound that a 100 engine with an aluminium head
          makes so would like to continue using these cast iron ones. </div>
        <div dir="auto">I'm contemplating installing hardened seats in
          one. </div>
        <div dir="auto">Hase anyone done this successfully?</div>
      </div>
      <span style="white-space: pre-wrap">
</span></blockquote>
    <br>
  </body>
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From: Kees Oudesluijs via Healeys <[email-masked]>
Date: Mon, 26 Aug 2024 17:27:45 +0200

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In most cases hardened valve seats were/are not necessary. There was 
only a small handful of engines that gave trouble after introducing lead 
free petrol.

Op 26-8-2024 om 16:43 schreef Bob Spidell via Healeys:
> local speed shop we trust (the machinist is a meticulous Kiwi who Dad 
> said got really excited when he saw 'Weslake' cast in the head). 
> road a couple weeks ago.
>> I am really picky and don't particularly like the different sound 
>> that a 100 engine with an aluminium head makes so would like to 
>> continue using these cast iron ones.
> Support Team.Nethttp://www.team.net/donate.html
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    <p>In most cases hardened valve seats were/are not necessary. There
      was only a small handful of engines that gave trouble after
      introducing lead free petrol.<br>
    </p>
    <div class="moz-cite-prefix">Op 26-8-2024 om 16:43 schreef Bob
      Spidell via Healeys:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      My dad had our BN2/100M's head redone--valves, guides, etc.--by a
      local speed shop we trust (the machinist is a meticulous Kiwi who
      Dad said got really excited when he saw 'Weslake' cast in the
      head). Unfortunately, Dad isn't around to ask, but they almost
      certainly installed hardened exhaust valve seats; it's been SOP
      since, well, since lead was removed from gas. No issues, and I had
      it out on the road a couple weeks ago. <br>
      <br>
      <br>
      <div class="moz-cite-prefix">On 8/25/2024 7:44 AM, Michael Salter
        wrote:<br>
      </div>
      <blockquote type="cite"
cite="mid:[email-masked]">
        <meta http-equiv="content-type"
          content="text/html; charset=UTF-8">
        <div dir="auto">I am still using cast iron heads on both my
          100's. Amazingly neither have serious cracks as are so common
          on these.
          <div dir="auto">I am really picky and don't particularly like
            the different sound that a 100 engine with an aluminium head
            makes so would like to continue using these cast iron ones. </div>
          <div dir="auto">I'm contemplating installing hardened seats in
            one. </div>
          <div dir="auto">Hase anyone done this successfully?</div>
        </div>
        <span style="white-space: pre-wrap">
</span></blockquote>
      <br>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre wrap="" class="moz-quote-pre">_______________________________________________

Archive: <a class="moz-txt-link-freetext" href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a class="moz-txt-link-freetext" href="http://autox.team.net/archive/healeys">http://autox.team.net/archive/healeys</a>

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</pre>
    </blockquote>
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From: Bob Spidell via Healeys <[email-masked]>
Date: Mon, 26 Aug 2024 08:57:48 -0700

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Well, that wasn't OP's question.

You can certainly get by without the inserts in a lower compression 
engine that isn't run hard but, if you're doing a head job then why not? 
The risk of cracking is legitimate, that's why you need a good, 
experienced machinist to do it; a good machinist will recommend against 
it if he's encountered problems with similar heads.

On 8/26/2024 8:27 AM, Kees Oudesluijs via Healeys wrote:
> only a small handful of engines that gave trouble after introducing 
> lead free petrol.
>
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    Well, that wasn't OP's question. <br>
    <br>
    You can certainly get by without the inserts in a lower compression
    engine that isn't run hard but, if you're doing a head job then why
    not? The risk of cracking is legitimate, that's why you need a good,
    experienced machinist to do it; a good machinist will recommend
    against it if he's encountered problems with similar heads. <br>
    <br>
    <div class="moz-cite-prefix">On 8/26/2024 8:27 AM, Kees Oudesluijs
      via Healeys wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <p>In most cases hardened valve seats were/are not necessary.
        There was only a small handful of engines that gave trouble
        after introducing lead free petrol.<br>
      </p>
      <div class="moz-cite-prefix">Op 26-8-2024 om 16:43 schreef Bob
        Spidell via Healeys:<br>
      </div>
      <blockquote type="cite"
        cite="mid:[email-masked]">
        <meta http-equiv="Content-Type"
          content="text/html; charset=UTF-8">
        My dad had our BN2/100M's head redone--valves, guides, etc.--by
        a local speed shop we trust (the machinist is a meticulous Kiwi
        who Dad said got really excited when he saw 'Weslake' cast in
        the head). Unfortunately, Dad isn't around to ask, but they
        almost certainly installed hardened exhaust valve seats; it's
        been SOP since, well, since lead was removed from gas. No
        issues, and I had it out on the road a couple weeks ago. <br>
        <br>
        <br>
        <div class="moz-cite-prefix">On 8/25/2024 7:44 AM, Michael
          Salter wrote:<br>
        </div>
        <blockquote type="cite"
cite="mid:[email-masked]">
          <meta http-equiv="content-type"
            content="text/html; charset=UTF-8">
          <div dir="auto">I am still using cast iron heads on both my
            100's. Amazingly neither have serious cracks as are so
            common on these.
            <div dir="auto">I am really picky and don't particularly
              like the different sound that a 100 engine with an
              aluminium head makes so would like to continue using these
              cast iron ones. </div>
            <div dir="auto">I'm contemplating installing hardened seats
              in one. </div>
            <div dir="auto">Hase anyone done this successfully?</div>
          </div>
          <span style="white-space: pre-wrap">
</span></blockquote>
        <br>
        <br>
        <br>
      </blockquote>
    </blockquote>
  </body>
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---

From: Robert Markovich via Healeys <[email-masked]>
Date: Mon, 26 Aug 2024 16:05:32 +0000 (UTC)

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I would still=C2=A0 put in a lead additive. MDR Relead is no longer made bu=
t there are others. It=E2=80=99s cheap insurance. And yes, I would not add =
hardened valve seats because of the likelihood of cylinder head cracks as a=
 result. The alloy heads come with those=E2=80=94at a steep price!=C2=A0

Sent from the all new AOL app for iOS

On Monday, August 26, 2024, 11:43 AM, Kees Oudesluijs via Healeys <healeys@=
autox.team.net> wrote:

=20
In most cases hardened valve seats were/are not necessary. There was only a=
 small handful of engines that gave trouble after introducing lead free pet=
rol.
=20
 Op 26-8-2024 om 16:43 schreef Bob Spidell via Healeys:
 =20
=20
 My dad had our BN2/100M's head redone--valves, guides, etc.--by a local sp=
eed shop we trust (the machinist is a meticulous Kiwi who Dad said got real=
ly excited when he saw 'Weslake' cast in the head). Unfortunately, Dad isn'=
t around to ask, but they almost certainly installed hardened exhaust valve=
 seats; it's been SOP since, well, since lead was removed from gas. No issu=
es, and I had it out on the road a couple weeks ago.=20
=20
=20
 On 8/25/2024 7:44 AM, Michael Salter wrote:
 =20
=20
I am still using cast iron heads on both my 100's. Amazingly neither have s=
erious cracks as are so common on these. I am really picky and don't partic=
ularly like the different sound that a 100 engine with an aluminium head ma=
kes so would like to continue using these cast iron ones.=C2=A0 I'm contemp=
lating installing hardened seats in one.=C2=A0 Hase anyone done this succes=
sfully?  =20
=20
  _______________________________________________Support Team.Net http://ww=
w.team.net/donate.htmlSuggested annual donation $12.75Archive: http://www.t=
eam.net/pipermail/healeys http://autox.team.net/archive/healeysHealeys@auto=
x.team.nethttp://autox.team.net/mailman/listinfo/healeysUnsubscribe/Manage:=
 http://autox.team.net/mailman/options/healeys/[email-masked]=20

|  | Virusvrij.www.avg.com |

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

[email-masked]

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<html xmlns=3D"http://www.w3.org/1999/xhtml" xmlns:v=3D"urn:schemas-microso=
ft-com:vml" xmlns:o=3D"urn:schemas-microsoft-com:office:office"><head><!--[=
if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>=
96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><bo=
dy>
I would still&nbsp; put in a lead additive. MDR Relead is no longer made bu=
t there are others. It=E2=80=99s cheap insurance. And yes, I would not add =
hardened valve seats because of the likelihood of cylinder head cracks as a=
 result. The alloy heads come with those=E2=80=94at a steep price!&nbsp;<br=
><br><br><div class=3D"yahoo-signature"><a style=3D"font-size:12px" href=3D=
"https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661" ta=
rget=3D"_blank" rel=3D"noreferrer noopener">Sent from the all new AOL app f=
or iOS</a><br></div><br><p class=3D"yahoo-quoted-begin" style=3D"font-size:=
 15px; color: rgb(132, 115, 255); padding-top: 15px; margin-top: 0px;">On M=
onday, August 26, 2024, 11:43 AM, Kees Oudesluijs via Healeys &lt;healeys@a=
utox.team.net&gt; wrote:</p><blockquote class=3D"iosymail"><div id=3D"yiv32=
11935178"><div>
    <p>In most cases hardened valve seats were/are not necessary. There
      was only a small handful of engines that gave trouble after
      introducing lead free petrol.<br clear=3D"none">
    </p>
    <div id=3D"yiv3211935178yqtfd64034" class=3D"yiv3211935178yqt4834159380=
"><div class=3D"yiv3211935178moz-cite-prefix">Op 26-8-2024 om 16:43 schreef=
 Bob
      Spidell via Healeys:<br clear=3D"none">
    </div>
    <blockquote type=3D"cite">
      </blockquote></div></div><div id=3D"yiv3211935178yqtfd05068" class=3D=
"yiv3211935178yqt4834159380"><div>
      My dad had our BN2/100M's head redone--valves, guides, etc.--by a
      local speed shop we trust (the machinist is a meticulous Kiwi who
      Dad said got really excited when he saw 'Weslake' cast in the
      head). Unfortunately, Dad isn't around to ask, but they almost
      certainly installed hardened exhaust valve seats; it's been SOP
      since, well, since lead was removed from gas. No issues, and I had
      it out on the road a couple weeks ago. <br clear=3D"none">
      <br clear=3D"none">
      <br clear=3D"none">
      <div class=3D"yiv3211935178moz-cite-prefix">On 8/25/2024 7:44 AM, Mic=
hael Salter
        wrote:<br clear=3D"none">
      </div>
      <blockquote type=3D"cite">
        </blockquote></div></div><div><div id=3D"yiv3211935178yqtfd68782" c=
lass=3D"yiv3211935178yqt4834159380"><div>I am still using cast iron heads o=
n both my
          100's. Amazingly neither have serious cracks as are so common
          on these.
          <div>I am really picky and don't particularly like
            the different sound that a 100 engine with an aluminium head
            makes so would like to continue using these cast iron ones.&nbs=
p;</div>
          <div>I'm contemplating installing hardened seats in
            one.&nbsp;</div>
          <div>Hase anyone done this successfully?</div>
        </div>
        <span style=3D"white-space:pre-wrap;">
</span>
      <br clear=3D"none">
      <br clear=3D"none">
      <fieldset class=3D"yiv3211935178moz-mime-attachment-header"></fieldse=
t>
      </div><pre class=3D"yiv3211935178moz-quote-pre"><div id=3D"yiv3211935=
178yqtfd90474" class=3D"yiv3211935178yqt4834159380">_______________________=
________________________
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</pre>
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