Fuel / Temp Gauge - Not Accurate

[dave295]

An easy way to check the temp. gauge is to drop the bulb into a saucepan of hot water. Check the water temp. with the infra red or other known thermometer and compare it (ignition on) with the cars gauge. Then you'll know the gauges "calibration" or accuracy.

I had the opposite problem with an old "red" motor in a Holden as the temp. sender is located at the back of the engine and the coolant flow was less than the front (near the water pump) and was hotter than at the thermostat housing.
A possible cure is to re-locate the sender unit.

[scootter]

To set my fuel gauge, I took out the sending unit and filled the tank to half a tank. I measured with a tape measure. Then reinstalled the sending unit to get a reading. It was off so I bent the float rod accordingly up or down till it read 1/2. You have to remember that the first half of the tank is actually more due to the shape of the tank.
Scott

[kkosche]

Originally Posted by dave295

An easy way to check the temp. gauge is to drop the bulb into a saucepan of hot water. Check the water temp. with the infra red or other known thermometer and compare it (ignition on) with the cars gauge. Then you'll know the gauges "calibration" or accuracy.

Motor has a 180 degree F thermostat in it. . . infra red temp gauge reads 180-190 on the temp housing when at operating temperature. Gauge reads 50 degrees C (or about 135 degrees F). I ordered a new gauge. Should be here Monday.

Thanks everyone on this part of the challenge.