[Mgs] Flushing the cooling system?

[Paul Hunt]

Well, of course, because the expansion tank is below the radiator, that is why
there is the filler plug in the thermostat housing of 4-cylinder cars and in
the top of the radiator of V8s.  That is where you should fill the system, all
you put in the expansion tank is enough to bring it up about half-way, then
over 2 or 3 heat-cool cycles top-up the expansion tank as required.
  ----- Original Message -----
  ...  I believe that part of the problem is that the
  radiator on the late B's is an indirect fill type - i.e you
  need to put the coolant in the fill above the thermostat as
  well as in the expansion tank.