Thisd setup is used by Volkswagen ever since I have driven these since 1978.
Audi work in the same manner and I like it very much.
People should be carefull coming with their hands near the fans, as these
may start at any moment when the engine is switched off!
Should not be much work to change the electrics though.
Beware to use an in line fuse for safety.
1971 BGT with fan driven by belt still
----- Original Message -----
From: "Paul Hunt" <email@example.com>
To: "Barrie Robinson" <firstname.lastname@example.org>; <email@example.com>;
Sent: Saturday, December 30, 2006 10:55 AM
Subject: Re: Temp sensor position
> 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?