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4065Re: [bmw e28] heat inquiry #2

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  • Guy DiCesare
    Dec 16, 2005
      re: heater valve with torn diaphragm: A repair kit is
      available on Ebay-it appears to contain a solenoid and
      a very tiny rubber gasket. Is the diaphragm an
      integral part of the solenoid? Thanks again for
      everything, Guy
      --- Guy DiCesare <guydicesare2000@...> wrote:

      > Right! I revved the car at a standstill this morning
      > and felt the heat fade away. this discounts the
      > possibility of an improperly closing air vent.
      > Thanks
      > much. Guy
      > --- Ed MacVaugh <macvaugh@...> wrote:
      >
      > > Coolant flow through the motor is a product of the
      > > water pump speed on
      > > BMW engines. Nothing else changes that flow. The
      > > thermostat controls
      > > that portion which is allowed to also flow through
      > > the radiator, and the
      > > heater control valve controls that portion that is
      > > also allowed to flow
      > > through the heater core inside the car.
      > >
      > > The original post concerned the heat in the cabin
      > > being high at rest,
      > > diminishing as the car speed increased. While the
      > > car speed was
      > > increasing, engine speed was also, thus the
      > > conclusion that the heater
      > > control valve had failed. More heat is transferred
      > > from slow moving
      > > coolant than fast moving coolant.
      > >
      > > Ed
      > >
      > > Blake Nancarrow wrote:
      > >
      > > >Quoting Ed MacVaugh <macvaugh@...>:
      > > >
      > > > > I don't agree.
      > > > >
      > > > > The hot at idle and none while underway are
      > > classic symptoms of the
      > > > > heater valve on the firewall having a split in
      > > its diaphragm.
      > > >
      > > >Ed,
      > > >
      > > >What does the heater value do exactly? Does it
      > > control coolant flow
      > > >through the motor? Into the cabin transfer unit?
      > > >
      > > >Cheers,
      > > >Blake
      > > >
      > > >Blake Nancarrow blaken@...
      > > >Computer Ease http://computer-ease.com/
      > > >
      > > >(sent via webmail while at Polar Bear/King St)
      > > >
      > > >
      > > >To unsubscribe from this group, send an email to:
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      > > >
      > > >
      > > >
      > > >
      > >
      >
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