The source to any heater is from top of engine block (intake Manifold),
adjacent to, but not affected by, thermostat - unless it's always open or
opens too soon but that shows on your temp gage-.. the water pump should
'pull' to re-circulate the water.
If the return hose to pump is cold but heater putting out little heat,
almost certain water pump failure.. as witnessed by two users here, same
time a few weeks ago.
The vulcan seems an odd duck, this also shows often as overheat at idle
but working okay at speed or the other way round. A round disk can act
as a pump, btw.
.. someone needs to build a complete FAQ on the dessication factor (it
apparently is not corrosion) on these pumps.
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
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