I agree for the larger fans, when it kicks on high the people inside the
vehicle notice and wonder what is wrong and if the wheels are going to
fall off.

There are several different radiator fan temp switches available. If
someone puts the lowest temp version in they can expect to hear the fan
a lot more than before. I tried one and took it right back out. It is
meant for other VW/Audi vehicles but is sold by various vendors as a
substitute Vanagon part. The other 2 switches are close to what VW
fitted originally. The 1.9 as well as 1.6NA diesels use the highest temp
switch and run the fan less. 2.1 models get the middle range switch and
run the fan more but not much on high speed unless the A/C is on.

Mark

Dave Vickery wrote:

> There might be something wrong that is causing more vibration than normal,
> but more likely you just aren't familar with how it sounds and it is
> operating normally.  The high speed fan, as people have said is very loun
> and spins fast so you can feel it a bit by your feet even when driving.
> The
> noise you can hear at any speed as you noticed.
>
> The only other thing I would add is if all is well, your high speed fan
> should (almost) never need to kick in.  Maybe up a steept grade in heat
> with
> AC on.  So, might be time to start thinking about some regular cooling
> system maintenance.
>
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