[Healeys] Temp gauge 30 degrees off - why?

["Steve B. Gerow" <steveg@abrazosdata.com>]

Hello listers,

Last weekend I adjusted my temp gauge pointer - it was showing 30+ degrees hot. 

I removed the thermostat and fan belt and inserted a cooking thermometer of 
known accuracy next to the temp gauge pickup bulb. Then removed the needle from 
the gauge and ran the engine to 190 degrees re-attaching the needle at 190 
indicated. This appears to have worked properly.

Does anyone know how the gauge gets out of adjustment, especially that far?

-- 
Steve Gerow
Altadena, CA
BN6
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