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I=E2=80=99ve never heard that bit about satellite seats, John, but it=E2=80=
=99s certainly
possible.
My recollection is that unleaded fuel first started becoming available in
America circa 1973-75 and it became dominant in the 1980s. It=E2=80=99s har=
d to
imagine engineering changes by the British motor industry being made in the
1960s for unleaded gasoline in the USA. Later on, perhaps.
On Wednesday, October 23, 2024, John Macartney <johnbmacartney@gmx.com>
wrote:
> Does anyone out there have documentary evidence (in the form of Service
> Bulletins issued by the factory or Leona NJ) that makes specific mention =
of
> the introduction of stellite valve seats in place of earlier and softer
> alternatives? I do recall BMC making something of a hoo-haa about stellit=
e
> seats being used in the MGB and Healey 3000 back in the sixties. Same
> applied to Rootes Group and Jaguar.
> There is hearsay in the UK that hardened seats went into heads for the US
> market at about the same time because of the introduction of unleaded fue=
l.
> That hearsay also suggests hardened seats were territory specific but fro=
m
> an ease of production standpoint, having two different types of seat duri=
ng
> machining and manufacture just doesn=E2=80=99t make sense. I can think of=
other
> examples where Standard-Triumph adopted a =E2=80=9Cone type fits all=E2=
=80=9D applied and
> that goes for other British makes.
> It=E2=80=99s clear that valve seat recession fears in Europe has been a k=
neejerk
> reaction to a problem that never really existed which suggests stellite
> valve seats were fitted for all markets. An engineering or service bullet=
in
> back in the day would have confirmed this but I never remember seeing one=
.
> Thoughts anyone?
>
> Jonmac
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
> Unsubscribe/Manage: http://autox.team.net/mailman/
> options/triumphs/don.hiscock@gmail.com
>
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I=E2=80=99ve never heard that bit about satellite seats, John, but it=E2=80=
=99s certainly possible.=C2=A0<div><br></div><div>My recollection is that u=
nleaded fuel first started becoming available in America circa 1973-75 and =
it became dominant in the 1980s. It=E2=80=99s hard to imagine engineering c=
hanges by the British motor industry being made in the 1960s for unleaded g=
asoline in the USA. Later on, perhaps.=C2=A0<br><br>On Wednesday, October 2=
3, 2024, John Macartney <<a href=3D"mailto:johnbmacartney@gmx.com";>johnb=
macartney@gmx.com</a>> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Does any=
one out there have documentary evidence (in the form of Service Bulletins i=
ssued by the factory or Leona NJ) that makes specific mention of the introd=
uction of stellite valve seats in place of earlier and softer alternatives?=
I do recall BMC making something of a hoo-haa about stellite seats being u=
sed in the MGB and Healey 3000 back in the sixties. Same applied to Rootes =
Group and Jaguar.<br>
There is hearsay in the UK that hardened seats went into heads for the US m=
arket at about the same time because of the introduction of unleaded fuel. =
That hearsay also suggests hardened seats were territory specific but from =
an ease of production standpoint, having two different types of seat during=
machining and manufacture just doesn=E2=80=99t make sense. I can think of =
other examples where Standard-Triumph adopted a =E2=80=9Cone type fits all=
=E2=80=9D applied and that goes for other British makes.<br>
It=E2=80=99s clear that valve seat recession fears in Europe has been a kne=
ejerk reaction to a problem that never really existed which suggests stelli=
te valve seats were fitted for all markets. An engineering or service bulle=
tin back in the day would have confirmed this but I never remember seeing o=
ne. Thoughts anyone?<br>
<br>
Jonmac<br>
** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> *=
*<br>
<br>
//www.team.net/donate.<wbr>html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; target=3D"_blan=
k">http://www.team.net/pipermail/<wbr>triumphs</a>=C2=A0 <a href=3D"http://=
www.team.net/archive" target=3D"_blank">http://www.team.net/archive</a><br>
<br>
hs/don.hiscock@gmail.com" target=3D"_blank">http://autox.team.net/mailman/<=
wbr>options/triumphs/don.hiscock@<wbr>gmail.com</a><br>
</blockquote></div>
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