66hcs-conv
Well-known member
- Joined
- Apr 1, 2007
- Messages
- 365
hi all,
The temp gauge in our '66 - 289, auto, shows hot - the needle goes all the way to the right hand side and a little beyond the brackets that indicate "normal".
BUT with a hand held temp reader, the temp shows 190 at the t-stat housing.
The sending unit varies from 248 ohms when cold (70 degrees) to 21 ohms when at 190 degrees. The hotter temps lower the resistance.
The gas & oil pressure gauges work good, the ammeter has never worked well.
Is this an indication of a bad Constant Voltage regulator (CVR)? It's the little regulator that mounts on the back of the dash and supplies voltage to the instruments.
I've tried a couple of different temp sending units and and they all end up with the same temp reading on the gauge.
OR what can I do to get the gauge to read correctly?
Thanks for your help.
The temp gauge in our '66 - 289, auto, shows hot - the needle goes all the way to the right hand side and a little beyond the brackets that indicate "normal".
BUT with a hand held temp reader, the temp shows 190 at the t-stat housing.
The sending unit varies from 248 ohms when cold (70 degrees) to 21 ohms when at 190 degrees. The hotter temps lower the resistance.
The gas & oil pressure gauges work good, the ammeter has never worked well.
Is this an indication of a bad Constant Voltage regulator (CVR)? It's the little regulator that mounts on the back of the dash and supplies voltage to the instruments.
I've tried a couple of different temp sending units and and they all end up with the same temp reading on the gauge.
OR what can I do to get the gauge to read correctly?
Thanks for your help.
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