Update for everyone:

- I drained the coolant this morning. Been in the motor for just under 3 years and it looked fine. Very little sediment/rust and no oil in it.
- I refilled with tap water only and took a drive. No issues.

When the IronTite kit comes in, I will do the "flush" and then the ceramic seal (with distilled water). I will let you know how it turns out. thumbs