looking for experience - plugged coolant line anyone?

[Livolsi, Stephane]

No, it's blowing too cold in the cabin for it to be the thermostat.  Even if
the thermostat is always stuck open, the coolant going to the heater core
would still be warm(ish) and the air out the vents would be warmish too.  I
am certain that the problem is coolant not getting to the heater core, and
the heater valve is not at fault.

Keep them coming guys (and gals).  Someone must have BTDT?

Stephane

> ----------
> From: 	Bill Rowe[SMTP:rowe at yankeeprinter.com]
> Sent: 	November 29, 2001 10:51 AM
> To: 	'Zsolt'; Livolsi, Stephane
> Cc: 	'Audi Quattro List'
> Subject: 	RE: looking for experience - plugged coolant line anyone?
>
> How about the thermostat????
>
> -----Original Message-----
> From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com] On
> Behalf Of Zsolt
> Sent: Thursday, November 29, 2001 1:39 PM
> To: Livolsi, Stephane
> Cc: Audi Quattro List
> Subject: Re: looking for experience - plugged coolant line anyone?
>
> Stephane,
>
> If your engine is running at normal operating temperature and it still
> only blows cold, it's most likely the control box. I just had mine
> changed for the same reason.
>
>    Zsolt
>
> Livolsi, Stephane wrote:
>
> > Patient: 86 5KTQ
> >
> > Symptom: Blower blows strongly but only cool from defrost, dash and
> foot
> > vents even with engine fully warmed up and climate control on max
> heat.
> > There is just a hint of warm coming through.  Previously would blow
> very hot
> > with engine warm.
> >
> > Original diagnosis: Defective heater valve.  Exploratory surgery on
> heater
> > hoses determines that heater valve is wide open and OK, BUT when the
> valve
> > was removed from the patient, no coolant (none, nada, zip, zilch,
> nothing to
> > clean up off the floor) came out of the disconnected lines....WTF?
> Blowing
> > in the heater hose going from the valve to the heater core (don't ask,
> ok?)
> > makes coolant come out of the heater hose that goes into the heater
> valve.
> > That means the air I blew in went all the way through the heater core,
> back
> > through the engine and then back towards the heater core through the
> heater
> > hose to the heater valve.  WTF2?
> >
> > Secondary Diagnosis:  The neck on the radiator top hose connection is
> known
> > to have broken off and parts ingested into the cooling system.  The
> flow is
> > from the engine to the top of the radiator, right?, therefore the
> pieces
> > probably ended up in the rad, and into the lower rad hose, and back
> into the
> > engine and has since plugged a smaller line supplying the heater core.
> >
> > Questions:
> > I know that the water pump runs off the timing belt, but is it
> possible for
> > the engine to be running well (which it does) and have the water pump
> not
> > pumping?  It seems to me this is impossible so must assume that the
> pump is
> > pumping if the engine is running.
> >
> > Anybody experience a plugged coolant line by foreign object and where
> was
> > it?  What is the most likely suspect?
> >
> > Multifunction temp switch is new this summer and gauge works well.
> However,
> > another area of concern is that sometimes the rad fan will kick on
> while the
> > gauge still indicates relatively low temp.  Thermoswitch for fan is in
> lower
> > rad while multifunction temp switch is on the engine.  How can the rad
> be
> > hotter than the engine?
> >
> > Any experience, suggestions welcome.
> >
> > PS: Had the first real snowfall of the year yesterday.  One word:
> Quattro!
> >
> > TIA
> >
> > Stephane Livolsi
> > 86 5KTQ
> > Williams Lake, BC, Canada
> >
> >
> >
> >
>
>
>