[T3] Fan replacement for a 1967 TYPE 3

[Joe Plowick III]

Here is a picture of the main fan taken apart.  The fan had some play in
the center section, so I drilled out the rivets to see how it worked.  I
haven't tried to take out the rubber bushings to see how they are held in
or could be replaced.

https://www.thesamba.com/vw/gallery/pix/2608542.jpg
https://www.thesamba.com/vw/gallery/pix/2608541.jpg

Joe Plowick
'69 Squareback


On Sat, Jul 26, 2025 at 4:41 PM Jim Adney <jadney at vwtype3.org> wrote:

> On 25 Jul 2025 at 17:43, bobsnotch at aol.com wrote:
>
> >  I always thought the large cooling fan was a harmonic dampener. And you
> >  want the rubber intact between the fan and the hub. I would think that
> it
> >  being welded would cause a vibration problem, unless it's welded and
> >  balanced before the crankshaft and it's components are balanced (you'd
> >  want the entire rotating assembly balanced together).
>
> I agree, and I believe Berg always does this as part of a complete
> crankshaft
> balancing. He has a writeup on this, which describes their balancing
> process, where they first balance the crank by itself, then add parts
> (flywheel, pressure plate, fan, pulley) one at a time, balancing each one
> as it
> is added.
>
> It took me a long time to understand why this is done, but it's because
> dynamic balancing is, by necessity, a two plane operation, meaning that
> you
> can only choose two planes at a time to balance. So you do the best
> balance
> you can with the crank, then add other parts one at a time, choosing that
> part's location as the next plane.
>
> Still, it would be nice to be able to preserve the damping feature of the
> fan,
> but I don't know anyone who has done that.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
> _______________________________________________
> VWType3.Org mailing list - type3 at vwtype3.org
> To unsubscribe or change subscription options, visit:
> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> If you need more help, contact: gregm at vwtype3.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.vwtype3.org/pipermail/type3-vwtype3.org/attachments/20250726/ea523b9c/attachment.htm>