landtodd wrote:* Block drain plugs have to be removed hot. *
I didn't use distilled water for the fill, for two reasons. 1) Without removing the drain plugs, you can't remove the flush water. 2) I'm still suspicious that mineral "hungry" water may cause unexpected errosion, but that opinion is based on limited GM experience, not Infiniti experience.
Havoline Orange 25% mix for all-alluminum engines.
You want "mineral hungry" water.The lower the ionic strength of a solvent, the more eagerly it will suspend any ions that may have snuck in and so the better it will be able to prevent scale from forming (or with luck even putting some existing scale back into solution).
High ionic strength water (such as almost all tap waters) have already neared their dissolution capacity, so in a way, they "push" solutes out of solution to precipitate (into scale).
Fred...