I have been puzzled by a higher than normal operating
temperature for some time.   Yes I have replaced the
thermostat and the relays and sensors.   What was a
major clue was that when the heaters were on and
running, the temperature would move down to the normal
openned thermostat position, slightly above the
halfway mark of the gauge.   The low speed fan and
high speed fan would cycle on but it was as if the
coolant was not making it to the radiator fast enough
to cool the engine.   The hose to the radiator was hot
and the hose from the radiator was warm.
   I bought a thermostat housing on ebay which had the
older style thermostats, older meaning that there is
considerable more metal in it's composition.   The
disc that opensand closes on the thermostat has metal
and rubber.   The one from busdepot and the one I
removed from the van both had the disc made entirely
of rubber.   When I boiled the two styles of
thermostats in a can of water what was clear was the
the older style openned much further.
Both openned but the one made mostly of metal openned
in a way that clearly would allowed more flow to the
radiator and yes it worked better for my problem.
So is this style available new?    thanks gary

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