Date:         Mon, 11 Feb 2013 08:58:25 -0800
Reply-To:     mark drillock <mdrillock@COX.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         mark drillock <mdrillock@COX.NET>
Subject:      Re: [Diesel-Vanagon] Re: All 2 Speed Radiator Fans Use Internal
              Resistor?
In-Reply-To:  <CAFnDXk1ye45ny3GuP-Fxk5DiEbxxW9rpx6ZqoZ3mBtBhE1W=6w@mail.gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

There are 2 versions of the later metal shroud to match the 2 versions
of the later fan motors.

There is no 3 speed fan motor, really. It is a larger single speed motor
that VW wired up to a large external resistor to create 2 slower speeds
to make a total of 3. Except in Syncro without A/C where they used a
large resistor to create only 1 slower speed for a total of 2.

The smaller motor used in 82/83 diesel vans was also used in 83-91 wbx
without factory A/C. It is built as a 2 speed unit internally.

The larger motor was used in 86+ with factory A/C and all Syncros.

The diameter of the motor is different as is the 3 bolt spacing that
attaches it to the shroud. Thus the metal shroud is different between
small motor and large motor.

The fan blade diameter is the same for both sizes of fan motor but the
larger motor turns faster.

(82 DV uses a plastic shroud with the same small motor as later small
motor models)

Mark

Jim Felder wrote:
> I recently had someone call about a radiator that I have. I took the fan,
> condenser and wiring harness off of it. I tossed the shroud in the trash as
> I have a couple of them already anyway and more and more limited room to
> keep stuff. I saved the rest of it. Then I read this thread and saw that
> the shroud only fits the three-speed motor, not the two-speed.
>
> So, in the interest of the possibility of upgrading my diesel westy to
> something that will power an AC system someday, I saved the shroud and put
> everything back on the shelf, including the wiring harness which is where
> the resistor plugs in to the motor. I presume that the thermo switch is
> different, too, the one that screws into the radiator?
>
> Is that a "true fact," do the late model motors only fit late model
> shrouds? I thought the difference was between 82 diesel vanagons and
> everything else, not the two and three speed motors. Let me know so I can
> sort this out.
>
> Thanks,
>
> Jim
>
>