The factory V8 does indeed have the temp gauge and fan sensors in the inlet
manifold. However the cooling fans (on all MGBs) are overridden by the
ignition, and so are not running when the ignition is off. This does give
rise to 'heat soak' and an increase in temp gauge reading until the whole
thing cools down, but that isn't a problem. I'd rather have that than the
fans running when unattended, possibly long duration hence flattening the
battery. In recent years there have been cases of modern cars wired that
way catching fire because the fan seized but was still powered, and with one
of them being parked in a garage at the time it burnt the owners house down!
----- Original Message -----
> ..... My temp sensor is on the radiator and this controls the electric
> fan. Thus when the rad is cooled while the car is stationary, off goes
> the fan despite the fact that the engine block may be still stonking hot!
> There is practically no heat path between them when the pump has stopped
> swirling water. Would it not be better therefore to put the sensor on the
> block, or at least the intake manifold?