[Mgs] Flushing the cooling system?

Simon Matthews simon.d.matthews at gmail.com
Mon Mar 9 20:19:35 MST 2009


Denise,

I think that your suggestion that the water cannot dissolve the metals
(or rather the corrosion products)  because it has dissolved minerals
in it is false.

Anyway, both argue for changing the water a little as possible in
climates where anti-freeze is not required.

Simon

On Mon, Mar 9, 2009 at 7:25 PM, Denise Thorpe <xyzabcde at earthlink.net> wrote:
> This is one of those debates like towing with/without the driveshaft
> removed, LMA vs silicone brake fluid, and cats.  What was the dispute about
> cats?
>
> But anyway... water is polar and likes to have ions in it so distilled
> water, which is pure, polarized water, tends to leech minerals out of
> whatever it touches including the iron in your engine block.  So yes, tap
> water has lots of junk in it, but it won't dissolve your engine.  My Toyota
> Tercel, which has an aluminum head, requires de-ionized water and the only
> source I could find for this is pre-mixed coolant.  Whatever was in the car
> when I got it did dissolve the head almost through to the combustion
> chamber.  I've always used tap water and coolant in my B and never had a
> clogging or dissolving problem.  And I flush the cooling system and the
> brake system whenever I remember which is about once every ten years.
>
> While I'm on the subject, it's possible to flush the cooling system with the
> cheap Prestone adapter without removing the thermostat.  You hook up the
> garden hose and set it to trickle and then run the engine to operating temp.
> You'll know when the thermostat opens because the flow suddenly gets bigger
> and dirtier.
>
> Denise Thorpe
>
> Danny V. said:
>
> After flushing, ALWAYS use distilled water with or without antifreeze.
> Mineral deposits are usually caused by the use of tap water in cooling
> systems.
> Danny V.
> '58 MGA
> '79 MGB V-6
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