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Off topic, but it seems I did not get all mails of this threat.
Anything happened with the mailserver?
Cheers,
Hans
71 BGT being prepared for MOT
Van: Mgs [mailto:mgs-bounces@autox.team.net] Namens Robert's New iPad
Verzonden: maandag 20 juli 2020 18:08
Aan: PaulHunt73
CC: Robert J. Guinness; mgs@autox.team.net
Onderwerp: Re: [Mgs] Jaeger Dual Gauge Modern Replacement Accuracy & Calibr=
ation
I did not read this thread from its beginning, thus my comments may be o=
ff target.
My assumption is that Bob put the bulb into a pan of boiling water, at w=
hich time the gauge indicated 190F. Unless he is testing about about 8500 =
ft altitude, that 190F is low. If he tested in boiling water near sea lev=
el, Paul is spot on-it is an out-of-spec gauge.
That is a good way to test gauges and thermostats, adjusting for altitud=
e.
It seems to me that contents of the tube alongside the engine=E2=80=99s =
head are already gaseous, thus heat added from the head would have insignif=
icant effect on the gauge reading.
I infer that the vendor is not offering to replace the gauge. If Bob wan=
ts to keep it and to install it, the infrared thermometer would allow him t=
o chart the difference between gauge reading and thermometer ready, hoping =
that the error is linear.
But then, there remains uncertainty about accuracy the oil pressure half =
of the gauge....
Bob
On Jul 20, 2020, at 11:28 AM, PaulHunt73 <paulhunt73@virginmedia.com> wrote=
:
No you aren't, and they would say that as it's obviously their gauge that i=
s faulty. Installed I can't see cooling system pressure squeezing the bulb=
enough to boost the gas pressure and hence the gauge reading anywhere near=
20 degrees. I don't know the correlation between pressure and reading, bu=
t it may be similar to the oil section.
I have often wondered whether the long (in an MGB at any rate) capillary tu=
be being alongside the head in the engine compartment does add a little to =
the reading, as all the tube there could be at 100-plus degrees F in hot we=
ather compared to less than 30 degrees in very cold weather, with the bulb =
- presumably with a correctly working stat - being at 180F in both cases.
If you were in the UK I'd say demand your money back as it's not fit for pu=
rpose, there are consumer protection rules, less easy if you are in another=
country. So many people these days just moan and don't demand corrective =
action, so there is little incentive for suppliers to up their game. The s=
implest thing is to be aware of it, and take the same action when it reads =
190 that you would at 212. Moving the needle could cause damage, but there=
may well be some negative reading that the stop prevents that would mean i=
t wouldn't be 20 degrees off the stop when cold. To me though, it would be=
more irritating to see that, than taking account of known under-reading, a=
s I find in both my cars there can be significant differences in 'normal' r=
unning winter and summer'. Unlike modern cars which I believe are computer=
controlled to prevent owner paranoia with 'normal' variations.
PaulH.
----- Original Message -----
I bought a new "Jaeger" dual gauge for my MGA from a vendor in England. .=
=2E. The new gauge never got over a hairs width beyond 190.
I called the vendor and they intimated that I was crazy to test it the way =
I did. Am I? Is there a better way to test it without installing it? Or =
is installation and an infrared thermometer a preferable way to test it.
_______________________________________________
Mgs@autox.team.net
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com
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</o:shapelayout></xml><![endif]--></head><body lang=3DNL link=3Dblue vlink=
=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US=
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D=
'>Off topic, but it seems I did not get all mails of this threat. <o:p></o:=
p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:11.=
0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Anything happened wit=
h the mailserver?<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN=
-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F4=
97D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US st=
yle=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>C=
heers,<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=
=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hans=
<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'font=
-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>71 BGT being=
prepared for MOT<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN=
-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F4=
97D'><o:p> </o:p></span></p><div><div style=3D'border:none;border-top:=
solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><spa=
n style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Van:</span><=
/b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Mgs =
[mailto:mgs-bounces@autox.team.net] <b>Namens </b>Robert's New iPad<br><b>V=
erzonden:</b> maandag 20 juli 2020 18:08<br><b>Aan:</b> PaulHunt73<br><b>CC=
:</b> Robert J. Guinness; mgs@autox.team.net<br><b>Onderwerp:</b> Re: [Mgs]=
Jaeger Dual Gauge Modern Replacement Accuracy & Calibration<o:p></o:p>=
</span></p></div></div><p class=3DMsoNormal><o:p> </o:p></p><div><p cl=
ass=3DMsoNormal> I did not read this thread from its beginning,=
thus my comments may be off target.<o:p></o:p></p></div><div><p class=3DMs=
oNormal> My assumption is that Bob put the bulb into a pan of b=
oiling water, at which time the gauge indicated 190F. Unless he is te=
sting about about 8500 ft altitude, that 190F is low. If he tested i=
n boiling water near sea level, Paul is spot on-it is an out-of-spec =
gauge.<o:p></o:p></p></div><div><p class=3DMsoNormal> That is a=
good way to test gauges and thermostats, adjusting for altitude. <o:p=
></o:p></p></div><div><p class=3DMsoNormal> It seems to me that=
contents of the tube alongside the engine=E2=80=99s head are already gaseo=
us, thus heat added from the head would have insignificant effect on the ga=
uge reading. <o:p></o:p></p></div><div><p class=3DMsoNormal> I i=
nfer that the vendor is not offering to replace the gauge. If Bob wan=
ts to keep it and to install it, the infrared thermometer would allow him t=
o chart the difference between gauge reading and thermometer ready, hoping =
that the error is linear.<o:p></o:p></p></div><div><p class=3DMsoNormal>&nb=
sp; But then, there remains uncertainty about accuracy the oil pressure hal=
f of the gauge....<o:p></o:p></p></div><div><p class=3DMsoNormal>Bob<o:p></=
o:p></p></div><div><p class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><br>On Jul 20, 2020, at 11=
:28 AM, PaulHunt73 <<a href=3D"mailto:paulhunt73@virginmedia.com";>paulhu=
nt73@virginmedia.com</a>> wrote:<o:p></o:p></p></div><blockquote style=
=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=3DMsoNormal><s=
pan style=3D'font-size:10.0pt'>No you aren't, and they would say that as it=
's obviously their gauge that is faulty. Installed I can't see coolin=
g system pressure squeezing the bulb enough to boost the gas pressure and h=
ence the gauge reading anywhere near 20 degrees. I don't know the cor=
relation between pressure and reading, but it may be similar to the oil sec=
tion. </span><o:p></o:p></p></div><div><p class=3DMsoNormal> <o:=
p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'font-size:10.0pt=
'>I have often wondered whether the long (in an MGB at any rate) capillary =
tube being alongside the head in the engine compartment does add a little t=
o the reading, as all the tube there could be at 100-plus degrees F in=
hot weather compared to less than 30 degrees in very cold weather, with th=
e bulb - presumably with a correctly working stat - being at 180F in both c=
ases.</span><o:p></o:p></p></div><div><p class=3DMsoNormal> <o:p></o:p=
></p></div><div><p class=3DMsoNormal><span style=3D'font-size:10.0pt'>If yo=
u were in the UK I'd say demand your money back as it's not fit for purpose=
, there are consumer protection rules, less easy if you are in another=
country. So many people these days just moan and don't demand correc=
tive action, so there is little incentive for suppliers to up their game.&n=
bsp; The simplest thing is to be aware of it, and take the same action=
when it reads 190 that you would at 212. Moving the needle could cau=
se damage, but there may well be some negative reading that the stop preven=
ts that would mean it wouldn't be 20 degrees off the stop when cold. =
To me though, it would be more irritating to see that, than taking account =
of known under-reading, as I find in both my cars there can be significant =
differences in 'normal' running winter and summer'. Unlike modern car=
s which I believe are computer controlled to prevent owner paranoia with 'n=
ormal' variations.</span><o:p></o:p></p></div><div><p class=3DMsoNormal>&nb=
sp;<o:p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'font-size:=
10.0pt'>PaulH.</span><o:p></o:p></p></div><div><p class=3DMsoNormal> <=
o:p></o:p></p></div><div><p class=3DMsoNormal> <o:p></o:p></p></div><b=
lockquote style=3D'border:none;border-left:solid black 1.5pt;padding:0cm 0c=
m 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bot=
tom:5.0pt'><div><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-f=
amily:"Arial","sans-serif"'>----- Original Message ----- <o:p></o:p></span>=
</p></div><p>I bought a new "Jaeger" dual gauge for my MGA =
from a vendor in England. ... The new gauge never got over=
a hairs width beyond 190.<br><br>I called the vendor and they intimated th=
at I was crazy to test it the way I did. Am I? Is there a bette=
r way to test it without installing it? Or is installation and an inf=
rared thermometer a preferable way to test it.<o:p></o:p></p></blockquote><=
/div></blockquote><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt=
'><div><p class=3DMsoNormal>_______________________________________________=
<br><br><a href=3D"mailto:Mgs@autox.team.net";>Mgs@autox.team.net</a><br>Don=
ate: <a href=3D"http://www.team.net/donate.html";>http://www.team.net/donate=
=2Ehtml</a><br>Suggested annual donation $12.75<br><br>Archive: <a hr=
ef=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><br><br>Unsubscribe: <a href=3D"http://autox.team.net/mailman/options/m=
gs/mgbobh@gmail.com">http://autox.team.net/mailman/options/mgs/mgbobh@gmail=
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