'48 Temp Gauge issue

Posted by Walt Haskins On 2014/9/24 15:09:03

Guys, need your help. Problem calls for smarter guys than me.

'48 Super with 327 engine. Rebuilt less than 5k miles ago. Has had a problem recently with the factory temperature gauge slowly going to peg on the "H". Have installed an auxillary gauge which shows the temperature to actually be between 180 and 190. Assume, therefore, it is a gauge issue, which is what we thought all along.

Have changed out the gauge with one removed from a salvage dash, same problem. Have changed sending unit, same problem.

Does anyone have any ideas what else might cause this? Is this gauge grounding sensitive such that corrosion somewhere around the dash could cause elevated readings?

Maybe two bad gauges, don't know. Anyone out there you trust to rebuild one of these and calibrate it correctly?

I know that these gauges are not real accurate, but it doesn't do any good to have a gauge that goes to "H" pegged every time. When I do have a problem I won't know until too late.

Thanks!