Distilled water has no minerals in it.  Because it's 'wants' to have
minerals in it, it 'takes' minerals from where ever it can get them; that'd
be the inside of your cooling system.  This is a form of corrosion and eats
away at any thing that it can get it's greedy little claws into.  I believe
that it has been proven to accelerate the breakdown of your engine's case
and heads, gaskets, radiator, heater cores, etc.
  Anyone else familiar with this issue?

Mike B.

----- Original Message -----
From: "Rob" <becida@COMCAST.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, January 30, 2008 11:12 PM
Subject: Re: distilled water for coolant - was New Car Dealers And Parts
Prices-a service advisors

> At  1/30/2008 05:28 PM, Allan Streib wrote:
>>On Jan 30, 2008, at 7:39 PM, Vdub Guy wrote:
>>
>>>I plan to flush my coolant system soon and replace it with VW blue
>>>coolant and distilled water.
>>
>>why distilled?  Is that what VW calls for?  Or is your local water
>>really extremely hard?
>>
>>Allan
>
> Distilled water is a known, tap water, who knows? I always use
> distilled when mixing up coolant.
>
>
>
> Rob
> becida@comcast.net
>