[s-cars] Gelling coolant

[Gísli Óttarsson]

Tom:

I nearly responded to your previous message about de-mineralized water by
commenting that that is what comes out of our cold-water taps here in
Iceland.  No such luck for the hot-water tap.  This is so polluted by
minerals and sulfur that you would think someone let eggs rot in your
bathroom.  Good for the teeth and the sperm-count, I suppose, but I would
not dream of letting it anywhere near my Audi.  And no, the car only
recently arrived on Icelandic shores so it is a near certainty that this is
not what's ailing the cooling system.

Gisli

On 4/17/07, Tom Green <trgreen at comcast.net> wrote:
>
> I think your caution is don't shock the engine by removing the coolant
> and/or giving it a big dose of cold water.  But, it doesn't require a
> long
> cool-down period before draining since the temps are equalized by
> running at idle.  I would be cautious about dumping a lot of cold water
> from a hose with lots of pressure and flow into the reservoir.  Besides,
> you are likely to cause the thermostat to close and really slow down
> the process.  Use some warm water to temper the water if you are
> nervous about it.  Add slowly in any case, you won't use that much
> per flush.  I would suggest using some of that Icelandic geo-thermal
> water but I've seen the mineral content.  :-)   Hmmmm, could that be
> what's in the coolant now?  :-)
>
> Tom
>
>
> > Date: Tue, 17 Apr 2007 09:30:20 -0400
> > From: Mark Pollan <mark.pollan at verizonbusiness.com>
> > Subject: Re: [s-cars] Gelling coolant
> > To: s-car-list at audifans.com
> > Message-ID: <000a01c780f4$8b9100e0$910e9283 at mcilink.com>
> > Content-Type: text/plain; charset=iso-8859-1
> >
> > Best/required to let her cool down before you drain and refill no?
> >
> > Mark
> >
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com
> > [mailto:s-car-list-bounces at audifans.com] On Behalf Of G?sli ?ttarsson
> > Sent: Monday, April 16, 2007 7:13 PM
> > To: Tom Green
> > Cc: s-car-list at audifans.com
> > Subject: Re: [s-cars] Gelling coolant
> >
> > This seems straightforward enough.  I'll probably have a go this
> > week-end,
> > if weather permits.
> >
> > Gisli
> >
> > On 4/16/07, Tom Green <trgreen at comcast.net> wrote:
> >>
> >> I'll have to defer to Dave Dawson on the details, but, you have the
> >> right idea,
> >> and the Finish should be fine. This is dishwasher detergent, not the
> >> dishwashing
> >> detergent for hand-washing dishes.
> >>   I suggest about a half cup or two times the normal dishwasher
> >> amount.  Drain the
> >> coolant first and refill with water and add the Finish.
> >> You don't want to operate the car, just run the engine until it gets
> >> up to temperature,
> >> then about 15 to 20 minutes at idle to let the cleaners work in the
> >> system including
> >> the heater.  Then drain and refill with water, bring to temperature,
> >> drain and repeat
> >> until the coolant water is perfectly clear.  It may take several
> >> times to remove all the old
> >> coolant and the dishwasher detergent.   Even the low sudsing
> >> dishwasher detergent
> >> can foam some, so it is important to completely flush all traces from
> >> the cooling system
> >> or a slight amount of foam can cause an air block in the system and a
> >> localized over-
> >> heating can occur.  Who knows if it is compatible with coolant?
> >> I suspect those fleet maintenance guys have a power flushing machine
> >> to expedite
> >> this process.
> >> It is a good practice to use de-mineralized (soft) water for the
> >> make-
> >> up portion of the
> >> coolant.
>
>
>
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