Aaron:
I had the same problem over the weekend with the Moss supercharged MGB. The
guage started heading upwards as soon as the engine warmed up. Sitting in
stop and go traffic the guage was reading just below the H which worried the
heck out of me. Oil Pressure stayed high, and there was no knocking or
pinging. I had the car out to attend an air show which wanted pretty cars
to display. Free entry to the show, if you parked your car on the apron
amongst battle planes of WWII, twist my arm! I parked the B in the shade of
a Fiedlander Storch (sp) which later demonstrated that in a 35 mph head wind
you can almost hang in midair. But I digress.
Water level was fine, so when I got the car back home I used my trusty temp
gun (present from wonderful wife) on the engine.
Sender temp 185
Head temp 190
Top tank temp 185
Lower hose cast iron elbow temp 175
at this point the guage was just below H, which indicates either the sender,
the guage, or the voltage stabilizer are Kaflooey. Since the tach pulses
when you hit the brake pedal, I'm taking a hard look at the stabilizer.
So, from the readings I got, I'd say yours are right in the ball park.
Kelvin.
> -----Original Message-----
> From: Aaron Whiteman [mailto:aaronw@wsu.edu]
> Sent: Monday, August 25, 2003 11:05 AM
> To: MG Mailing List
> Subject: surface temperatures
>
>
> I am trying to figure out if the temp gauge or sending unit
> on my '75 B
> is bogus, since it tends to read hot for the entire summer.
>
> To help, I bought a new toy at NAPA[0], and have measured some
> temperatures when the gauge reads slightly above 'N'.
> Head: 200 F
> Upper Rad Tank: 195 F
> Rad Core (slightly off center): 185 F
>
> Do these numbers look about right (they look right to me, but I don't
> know any better)?
>
> For reference, Pullman has cooled quite a bit now, we've been seeing
> highs in the upper 70's for the past week or 2. When temps
> were in the
> upper 90s and triple-digits, the gauge read at just below
> 'H'. I have
> not had boil-over problems, even when I took on the Vantage hill.
>
> [0]: http://www.raytek-northamerica.com/cat.html?cat_id=2.3.5
>
> --
> Aaron Whiteman -- '75 B http://www.wsu.edu/~aaronpw/MG/
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