rad fan behavior

[George Nimmer]

Thanks,

I'll take a look whats on the cam cover in the morning...  My fan is
actually from an '82 VW Rabbit.  It fit exactly, and I got it used for
$40 when my old fan died.  I see prices for the "real" fan around $180
new.  I believe this rabbit fan is a 4-blade model.

My rad sender is actually new (within 6 mo.) and FYI it is the same OEM
part as is used in a Porsche 928.  Perhaps the wires attached to it are
loose.  Something else to check in the morning...

Do you know if the after-run rad fan feature can be installed in an '85
if it does not already have this?  Or is this more trouble than it's
worth?

Yes, mine is audible while in the car with radio off, but not too loud.
If the car is parked and idling, and you are standing next to it, it is
very loud compared to a "newer" car.  This could be normal maybe for a
4000?

Do you know if the multi-speed fans could be used in my '85 in place of
the "hurricane only" model?  Could again be more trouble than it's worth
but I'm just curious.

Thanks,
George


On Tue, 2002-10-01 at 21:27, Huw Powell wrote:

> that is normal.  there are two completely separate circuits running the
> "engine on" and "after-run" radiator fan.  although, as some have said,
> your '85 might not even have the afterun setup.
>
> The after-run sender is on a bracket mounted to the two rearmost cam
> cover studs.  pull the wires and short them (if it is there), if the fan
> runs, you've just tested everything but the sender.  pull the sender,
> attach the wires, and drop it in boiling water to check the sender
> crudely...
>
> >
> > 2. When the car is first warming up in the morning, and coolant
> > temperature is starting to climb up to normal operating temp, the
> > radiator fan flicks on and off repeatedly sometimes, until normal
> > operating temp is reached.
>
> that's not normal, you might have a faulty sender in the radiator.
>
> > 3. The radiator fan is very loud compared to later model cars.  Is this
> > normal?  Is there a quieter fan from a late model Audi that will fit (or
> > that can be modified to fit) a 4000q?
>
> hurricane only... I think there are three and five blade fans that were
> used there, can't remember what is in my coupe right now, or what
> year/model it came out of, but I can hear it with the radio off and
> windows closed, but not too loudly.  Yours might also have a chipped
> blade which would make it louder.  or a noisy motor...
>
> --
> Huw Powell
>
> http://www.humanspeakers.com/
>
> http://www.humanthoughts.org/