Maybe I had the same problem but mine occurred right after an engine
rebuild. I didn't have any of these fancy temperature measuring gizmos like
you guys. I had to settle for old fashioned observation, ultimately ending
up removing the radiator cap and noting the lack of pressure or steam. So I
knew the temperature gauge indication was bogus and my coolant temperature
was not very high despite the gauge just being a hair shy of "H".
Mine turned out to be the voltage stabilizer - or to be more exact, the
grounding of the stabilizer. One indication, perhaps a bit more subtle -
the fuel gauge also appeared to be reading a bit higher than expected.
David Councill
67 BGT
72 B
At 02:03 PM 8/25/2003 -0700, Dodd, Kelvin wrote:
>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.
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