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

To: "'Michael Salter'" <michaelsalter@gmail.com>, <healeys@autox.team.net>
Subject: Re: [Healeys] Hardened seats in a cast iron 100 head
From: <kags@shaw.ca>
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 <healeys-bounces@autox.team.net> On Behalf Of Michael Salter
Sent: Sunday, August 25, 2024 7:44 AM
To: healeys@autox.team.net
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?


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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Contemporary"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Elegant"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Professional"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Balloon Text"/>
<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
xt"/>
<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
 Spacing"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/=
>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/=
>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/=
>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
uote"/>
<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
ntense Quote"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"19" QFormat=3D"true" Name=3D"S=
ubtle Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"21" QFormat=3D"true" Name=3D"I=
ntense Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"31" QFormat=3D"true" Name=3D"S=
ubtle Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"32" QFormat=3D"true" Name=3D"I=
ntense Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"33" QFormat=3D"true" Name=3D"B=
ook Title"/>
<w:LsdException Locked=3D"false" Priority=3D"37" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" Name=3D"Bibliography"/>
<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"TOC Heading"/>
<w:LsdException Locked=3D"false" Priority=3D"41" Name=3D"Plain Table 1"/>
<w:LsdException Locked=3D"false" Priority=3D"42" Name=3D"Plain Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"43" Name=3D"Plain Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"44" Name=3D"Plain Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"45" Name=3D"Plain Table 5"/>
<w:LsdException Locked=3D"false" Priority=3D"40" Name=3D"Grid Table Light"/=
>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful"/>
<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=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
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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;healeys-bounces@autox.team.net&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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