'90 Audi 90 - No heater valve?
12-30-2004, 10:14 AM
#11
Guest
Posts: n/a
Re: '90 Audi 90 - No heater valve?
Thanks for all of your help Tony, I was afraid of that 
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
12-30-2004, 10:14 AM
#12
Guest
Posts: n/a
Re: '90 Audi 90 - No heater valve?
Thanks for all of your help Tony, I was afraid of that
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
12-30-2004, 10:14 AM
#13
Guest
Posts: n/a
Re: '90 Audi 90 - No heater valve?
Thanks for all of your help Tony, I was afraid of that
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
Steve
"Tony" <tonyjnospam@nospamvisi.com> wrote in message
news:41d2fe76$0$12714$a1866201@visi.com...
> I called a friend who is an independent mechanic for audis.
>
> He said that the 90s had, in some cases moved the heater control valve
back into
> the heater box with the coil. Rather fun to get at.
>
> The B5 chassis (later) went with an always-on system where the heat was
> controlled entirely by the air flaps.
>
> His guess is that it is more likely that the heater control flaps are the
source
> of your problem. If you are familiar with the T44s the complex vacuum
system
> for flap control is a source of many hours of mechanical challenge. If
your
> system is vacuum operated you should check for leaks or inoperative vacuum
relays.
>
> Tony
>
> ~ ElektraMan ~ wrote:
> > Thanks Tony,
> >
> > I know what the T44's heater valve looks like. I've had experience with
one
> > failing. As far as I know the 90's heater valve should be identical.
> >
> > I'm looking for the heater valve on my Audi 90 model. So far I can't
find
> > it, strange as it seems. I've followed the supply hose from the
thermostat
> > flange to the firewall. No heater valve. I've looked up what the heater
> > valve for the 90 is supposed to look like and evidently its supposed to
be
> > the same one as the T44's. The car is not producing much heat to the
cabin
> > so that has been my inspiration to investigate the heater valve status.
> > Maybe that it was removed at one time and never replaced? The car was
> > originally located in San Antonio TX so heat would not have been a big
> > concern. Where SHOULD these be located in the 90 model?
> >
> > TIA,
> > Steve
> >
> >
> >
> >>There are two hoses. Supply and return. On T44s the control valve is a
> >
> > white
> >
> >>plastic part with a vacuum line to it, located just behind the engine's
> >
> > head.
> >
> >>The plastic ones break so it may have been replaced with a steel one.
> >>
> >>Tony
> >>
> >>~ ElektraMan ~ wrote:
> >>
> >>>Does anyone know if my Audi 90 should have a heater valve? I can't see
> >
> > that
> >
> >>>it does. If so where is it located? I've followed the heater hose to
the
> >>>firewall and there is no valve on the hose. Is this correct? Or am I
> >
> > looking
> >
> >>>in the wrong area? I replaced one in my Audi 100 so I have a general
> >
> > idea
> >
> >>>where it should be but it's not there. Any help would be appreciated.
> >>>
> >>>TIA,
> >>>Steve
> >>>
> >
> >
> >
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