Your temperature gauge reading is only as good as the 10 volt reference
provided by the "instrument voltage stabilizer" that's mounted under your
dash. The fuel gauge and temperature gauge are both powered from this little
gem, and if you have ever wondered why it is that it takes forever for the
first half of the fuel tank to get used up and the last half disappears in
about one hour of driving, then the stabilizer is toast and it's always
putting out 12 volts (or whatever your ignition voltage is). If your fuel
gauge is doing this then your temperature indications will similarly be bad,
and the higher the real temperature, the further towards the right end of
the scale your temp indication will be.
Theo
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Tigerman
Sent: February 13, 2007 4:10 PM
To: Wally Menke; Tiger List
Subject: Re: Temperature
I've seen alot of good answers to this, but I can think one thing worth
mentioning. I personally know that my car's temp 'gauge' is not an
accurate measurement of actual engine temp, at least mine temp reading
compared to an IR thermometer pointed at the brass fitting was off by 15-20
degrees (I was reading 195 on the IR, and 210-215 on the gauge.). Based on
the fact we watched the temp come up and stabilize at 195, I think that the
IR reading was probably close to accurate (as I am guessing that the
thermostat in the car is 195).
So I learned to watch the temp gauge for a change in temp, but the numbers
on the dial weren't as accurate as I would have liked.
Steve
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