[Healeys] Temp Gauge

[BJ8 Healeys]

Bob, I'm assuming you are referring to your BJ8.  The needle can be pulled
off and reset wherever you want it, but there are two real calibration
points as indicated by two small dots on the face of the gauge between 120 -
160 and at about 212. Although I have no proof, I believe the factory used
these calibration points with specific input voltages in order to make the
gauge reasonably accurate over its full range.  If you pull off the needle
and put it on 180 (if you know for sure the sensor is sensing 180), then the
gauge might be inaccurate everywhere else.  
The best way to check calibration, although a real pain, is to remove the
gauge from the dash and check the gauge reading while the sensor is in
boiling water at sea level.  I did this with my gauge and found it reading
about 10 deg. high.  After pulling the needle off and repositioning it
between the two dots at 212, the gauge was accurate enough for me through
its range.

Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC  USA

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Bob Spidell
Sent: Sunday, May 27, 2012 9:23 AM
To: healeys
Subject: [Healeys] Temp Gauge

My temp gauge has lost calibration; it indicates 160deg when it should read
180 (I tried a different thermostat with no change). Otherwise, it seems to
be working (but reading 20deg low). 

Can the indicator needle be pulled (carefully) off and (re) set to give
correct temperature? 

TIA, 
Bob 


-------------------------------- 
Bob Spidell - San Jose, CA