Reply to "Some good...some bad! It passed the MoT test ... But it over heated on the way home."

You want the original sender. ANY Pantera vendor has them. They are a Ford sender.

Very simple installation, one wire hook up.

YOU DO NOT need to turn this into some sort of NASA scientific event. Just put the sender into the engine where it belongs.

The system is good to 252 degrees with 50/50 anti-freeze and a 15 psi cap.

This IS NOT something that you need to be able to calculate in order to pass your PE licensing exam.

If you have the early Veglia gauge it will top the gauge out or come close to it. That DOES NOT indicate that the car is overheating.

If you have the later L gauge I believe it is a 260 and it will appear more reasonable on the gauge at full operating temps.