On Mon, 23 Sep 1996, Robert J Donahue/DELCO wrote:
> <From: gibbons @ northpole.med.uvm.edu ("W. R. Gibbons") @ USDESMTP
> <Pure water will not contain lubricants and rust inhibitors that are in
> <good quality anti freeze. These would have to be added separately.
> <Moreover, I believe that a 50-50 mix of antifreeze and water has a
> <*higher* boiling point as well as a lower freezing point, compared to pure
> <water. I do agree that the water mixed with the antifreeze should be
> <distilled.
> < gibbons@northpole.med.uvm.edu (802) 656-8910
>
> I heard several people warn against using distilled water at MG Indy 96,
> although they could not explain why. That sounds like an old wives tale
> to me. What could possibly be bad about using distilled water with
> antifreeze? Anybody else ever hear of this?
If I remember correctly, the coolant mix has a higher boiling point than
water, but it doesn't transfer heat as effectively (lower heat capacity?
can't remember). Thus, your engine will run slightly hotter with 50/50,
but it has more headroom before it boils.
I also remember reading that distilled water should not be used. Of
course I don't remember why, but it made sense or I would have definitely
switched to distilled water!
The only thing I can think of is that the minerals etc. in the water must
aid in heat transfer or raise the heat capacity.
Ulix __/__,__
.......................................................... (_o____o_).....
'67 Sprite
|