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There are two methods I have used.
Drive around until the gauge shows whatever normal is for your car, but d=
o this with the rad cap loose so there is no pressure building. Leave engin=
e running and remove the cap, immersing a kitchen =E2=80=9Ccandy=E2=80=9D th=
ermometer into the liquid. You will then be able to associate needle positi=
on with a known temperature.=20
Drive around and get everything warm, then use an infra-red thermometer, a=
bout $30 at Harbour Freight, taking temp of the thermostat housing and radia=
tor top tank. This will also help you to associate a point on the gauge to t=
he thermometer reading.
The IR thermometer has additional value, in that you can shoot it all arou=
nd the radiator front side, checking that temp is equal side-to-side. Botto=
m should be a bit lower than top, because the cooled water is moving down, a=
nd with this you can see how it happens.
Bob
> On Oct 19, 2020, at 4:58 PM, Michael MacLean <rrengineer.mike@att.net> wro=
te:
>=20
> Anyone know how I can check the accuracy of my 1969 MGB GT temp gauge? Ju=
st a needle and a range, no temp readings.
> Mike MacLean
> 1969 MGB GT
> 60 Bugeye
> 1956 BN2 Lemans
> _______________________________________________
>=20
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">&nb=
sp; There are two methods I have used.</div><div dir=3D"ltr"> &n=
bsp;Drive around until the gauge shows whatever normal is for your car, but d=
o this with the rad cap loose so there is no pressure building. Leave e=
ngine running and remove the cap, immersing a kitchen =E2=80=9Ccandy=E2=80=9D=
thermometer into the liquid. You will then be able to associate needl=
e position with a known temperature. </div><div dir=3D"ltr"> &nbs=
p;Drive around and get everything warm, then use an infra-red thermometer, a=
bout $30 at Harbour Freight, taking temp of the thermostat housing and radia=
tor top tank. This will also help you to associate a point on the gaug=
e to the thermometer reading.</div><div dir=3D"ltr"> The IR thermomete=
r has additional value, in that you can shoot it all around the radiator fro=
nt side, checking that temp is equal side-to-side. Bottom should be a b=
it lower than top, because the cooled water is moving down, and with this yo=
u can see how it happens.</div><div dir=3D"ltr">Bob</div><div dir=3D"ltr"><b=
r></div><div dir=3D"ltr"><br>On Oct 19, 2020, at 4:58 PM, Michael MacLean &l=
t;<a href=3D"mailto:rrengineer.mike@att.net";>rrengineer.mike@att.net</a>>=
wrote:<br><br></div><blockquote type=3D"cite"><div dir=3D"ltr"><div class=3D=
"yahoo-style-wrap" style=3D"font-family:times new roman, new york, times, se=
rif;font-size:16px;"><div dir=3D"ltr" data-setdir=3D"false">Anyone know how I=
can check the accuracy of my 1969 MGB GT temp gauge? Just a needle an=
d a range, no temp readings.</div><div dir=3D"ltr" data-setdir=3D"false">Mik=
e MacLean</div><div dir=3D"ltr" data-setdir=3D"false">1969 MGB GT</div><div d=
ir=3D"ltr" data-setdir=3D"false">60 Bugeye</div><div dir=3D"ltr" data-setdir=
=3D"false">1956 BN2 Lemans<br></div></div></div></blockquote><blockquote typ=
e=3D"cite"><div dir=3D"ltr"><span>__________________________________________=
_____</span><br><span></span><br><span><a href=3D"mailto:Mgs@autox.team.net"=
>Mgs@autox.team.net</a></span><br><span>Donate: <a href=3D"http://www.team.n=
et/donate.html">http://www.team.net/donate.html</a></span><br><span>Suggeste=
d annual donation $12.75</span><br><span></span><br><span>Archive: <a h=
ref=3D"http://www.team.net/pipermail/mgs";>http://www.team.net/pipermail/mgs<=
/a> <a href=3D"http://autox.team.net/archive";>http://autox.team.net/archive<=
/a></span><br><span></span><br><span>Unsubscribe: <a href=3D"http://autox.te=
am.net/mailman/options/mgs/mgbobh@gmail.com">http://autox.team.net/mailman/o=
ptions/mgs/mgbobh@gmail.com</a></span><br></div></blockquote></body></html>=
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_______________________________________________
Mgs@autox.team.net
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mharc@autox.team.net
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