[Healeys] overheating

[Bob Spidell]

re: "So if the iron in the block and head isn't a mineral what is it?"

An element.

The point of using distilled--or, better yet, deionized water--is that 
it's non-electrolytic; i.e. it does not facilitate a reaction between 
the iron in the block and oxygen (from air) in the coolant which 
produces corrosion (rust).

Some tap water IS very hard and will leave significant deposits over 
time.  

bs


Richard Ewald wrote:
> So if the iron in the block and head isn't a mineral what is it?  Animal or
> vegetable?
> :-)
> (sorry could not resist)
> Point is most tap water is so low in mineral content that it won't make a
> difference one way or the other.
> Rick
>
>   
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Bob Spidell           San Jose, CA            bspidell at comcast.net

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