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many go the extra step and use distilled water.


...not to change the subject, it's sorta relevant...

what might be the adverse effects on using NOT distilled?
I'm thinkin' of using distilled next flush/fill, bcuz I've noticed what appears to be some kinda "salt" floating around in the reservoir. I filtered it through a coffee filter, and when dry, it's like grayish talcum powder. Wonder if this is something precipitating from the well water (with water softener), of if it's like Alum Oxide from the aluminum of the head ?

Anybody else seen this ? p.s. I'm running 50/50 ...


That's most likely calcium... and that's exactly why you
should use distilled water. It plugs up the rows and passages in the radiator.
Minerals in regular tap water do all kinds of funny stuff.
They aid in corrosion, which anti-freeze has inhibitors for,
but it can only do so much. They also increase the boiling
and freezing point of the water. Not enough to worry about, but they do.

Nothing wrong with using tap water, you just need to
do coolant changes and flushes a little more often than
you would with distilled water.

1995 Trooper LS auto 3.2 DOHC /w SOHC intake
1989 Trooper 2.6 auto
1989 I-Mark RS DOHC 1.6
1991 Stylus XS DOHC 1.8