The website for the Baldwin coolant filter:
http://www.baldwinfilter.com/products.html

While filtering out particles, it also supplements the coolant
with corrosion inhibiting chemicals over a period of one year.
I'm still experimenting with this.
I'm going to hook the coolant filter into the coolant loop
that goes to the rear heat exchanger under the back seat.
For some that removed the rear heat exchanger, it would be a
snap to install the coolant filter in its place.

Things you need to install:
                                 Prod line  Part no.     Price
filter base                   BAL        CFB5000    25.00
element                     BAL         BW5136       8.54
some brass fittings
some 3/8 id coolant hose
optional on/off 3/8 ball valves

That is the filter for 1-10 gallon coolant systems.
The technician from Baldwin assured me it would be
compatible with the vw coolant.
We'll see.
Harald
'90 westy

Brent wrote:
Coolant filter??  Tell us more!

Does it just filter particulates, or other stuff, too?

Brent Christensen
'89 GL Syncro Westy
Santa Barbara, CA