water temp ggauge readfing too high - how do I correct?

[magpies]

While on Jools rolling road it was noticed that the car temperature gauge was reading very high compared to the readings on the rolling road VDU and confirmed by the cut in /out of the electric water pump and fan controller.

When the Rolling road and fan controller were reading 85degC the temperature gauge was reading halfway through the red (approx. 110degC) I believe the oil temperature settled at about 90.

So I think I have the wrong sender but don't know which would be the correct one. Would it be possible to fit a resistor instead? If yes has anyone have an adjustable rheostat I can borrow? I'm in Tesside

[magpies]

I'm going down the route of a variable resistor may be a waste of £2.13

[magpies]

v8s4me said:

What are you using?

I'll let you know when I've sorted the problem - If I don't sort it I'll stick a new face plate over the original, same as I did with thhe fuel gauge which reads in reverse (with the Jag in-tank sender)

[magpies]

Suppose I can remove the sender and place in a pan of water an a thermometer. Raise and stir try to regulate the gas heating to hold a steady ish temperature while I take a resistance reading. Should give a reasonable indication. The difficult part would be the gauge as I do not have access to numerous resistors bit seeing what the sender is will give me the approximate range needed. Would that work?

[magpies]

Hi Mike. Looks greenish. I can't post photos on here but I'll put one on fb