Ever since I had to flush and fill and bleed the cooling system on my 84'
the gauge has read a little higher then before.  It used to have green=bad
antifreeze and now has blue autobahn stuff.  It used to read right in the
middle of the led but now reads right at the top of the led.  This has been
fine but today I noticed the gauge reading a little warmer once I came to a
stop light off of the highway.  It hasn't done this until today.  I drive
for about ten minutes at about 70 on my way to work.  Once I got to work I
checked the overflow tank and noticed that the level didn't seem any higher
than it was cold.  I am thinking maybe the pressure cap on the expansion
tank is not working correctly.  Is that a good guess?  If so, anybody know
the part number so I can order from a foreign auto parts store instead of
the VW?  Also, is there a way to check if the fan switch on the radiator is
working correctly?
                                Thanks in advance.
Tim  Vogelin
84' Wolfsburg
Appleton, WI