[Healeys] Water Temp gauge problem

Oudesluys coudesluijs at chello.nl
Fri May 24 08:51:34 MDT 2013

If you have an electrical gauge the 10V supply is from a voltage 
regulator, a small metal box of about 1"x2" fitted usually to the studs 
of one of the larger instruments, but it could be anywhere behind the 
dash. If at fault both the temperature and  fuel gauge will read wrongly.
However I presume you have a mechanical combination oil pressure/water 
temperature gauge. Most likely the needle has slipped on the spindle. 
Lever of the needle using two small screwdrivers. Immerse the bulb in 
boiling water and fit the needle on the 2120F/1000C point.
It is also possible that the gear on the spindle jumped. You can rectify 
that by pressing the bourdon spring very carefully to free the small 
gear on the spindle and then reposition the gears.
Kees Oudesluijs

Op 24-5-2013 15:54, Derek Job schreef:
> My temperature gauge is only showing about 85 degrees when tested in
> boiling water. I understand that these gauges need a steady 10 volts to
> work correctly. What is it that regulates the supply of 10 volts? My car
> now has an alternator so no external voltage regulator.
> Derek
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