A8 coolant circulation issues @#$%^&* !!

[Mark R]

Most of the shops are using vacuum bleeders these days to help purge the
system.
Either you still have air in the system, or you have another form of
blockage (causing the differential pressure).


On 4/10/07, Bing <bing30v.audi at gmail.com> wrote:
>
> So I purged the system and let lots of air out,I squeezed lower hose and
> now felt warm water going through.I  drove the car and found that lower
> rad hose was cold again,and felt no water resistance when squeezing hose..
>
> On 4/10/07, Mark R <speedracer.mark at gmail.com> wrote:
> >
> > The presumption is that all is working correctly (i.e. the new water
> > pump is working, etc.).  I've had luck doing the purging on my hill.
> > Basically raise the side up to force the high spot higher.  Purge when
> > running (flow), heater core flowing, etc..
> >
> > Alternatively, start cracking the pipes (so to speak) to verify flow,
> > etc.  It's a pretty simple system and the A8s are prone to getting an air
> > lock.
> >
> > Mark Rosenkranrtz
> >
> >
> >  On 4/10/07, Bing < bing30v.audi at gmail.com> wrote:
> >
> > > I recently replaced the the timing belt,t-stat,water pump,rollers and
> > > what
> > > not on my 98' A8 4.2Q  and now running hot at stop lights...I have
> > > cracked
> > > the bleed valves at the heater core to release trapped air, but not
> > > much air
> > > purged..My t-stat housing is super hot to the touch but my lower
> > > radiator
> > > hose is ice cold from rad bottom to t-stat housing while upper hoses
> > > are
> > > hot..T-stat is operational,it opened in pan of boiling water.....What
> > > Gives???
> > >
> > > --
> > > Bing
> > > '01 A4 2.8QM 30v
> > > '98 A8 4.2Q
> > > '93 ur//S4
> > > 82 valves :-)
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> > > quattro at audifans.com
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> > > ---
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> > >
> >
>
>
> --
> Bing
> '01 A4 2.8QM 30v
> '98 A8 4.2Q
> '93 ur//S4
> 82 valves :-)
>