Thats funny we have 2 firecats in the shop with LESS than 10 miles and have been confirmed BY CAT to myself on the phone today to have exchanger restrictions in them and yes it is possible to have one with less than 10 miles, properly set up cooling system and still overheats, scoring the pistons, WITHOUT the light ever coming on! I spent 2 hours on the phone with one of the head techs today and Blacksabercats problem could be the heat exchanger! Did you actually check the exchanger out? We did't find out until today and we are a Cat dealer so I would guess you havent heard of this problem and how to check it. I would hate to see BlacksaberCat burn down again when he could have checked things out for only an hour worth of time.