I have an 87 Vanagon (manual transmission) since 1991 and I still love it.
It has been 3 years already since overheating problems started. Engine has
been rebuilt (about a year ago) and the problem still continues.  I have
changed most parts related to the cooling system (thermostat, temperature
sensors 1 & 2, coolant distributor, water pump, expansion tank, several tubes
and pipes that looked oxidized or about to be perforated) almost everything
except the radiator (original), although it has been examined and tested.  In
order to maintain engine temperature to its upper limit, the radiator fan and
the heating system have to be running and on all the time, which makes
driving very uncomfortable. Does anybody have experienced the same problem? I
have to acknowledge my ignorance related to car engines and mechanics so I
cannot be more specific so far. Any suggestions, comments, advice, will be
most welcome.