I am assuming that you added GREEN coolant to the DEX COOL Orange. As stated in another answer, the coolant may be compatible with DEX COOL. If that is the case then you are ok. If it is not compatible it will not destroy anything but I would recommend you get your coolant changed. It is simple to do and most any person with slight mechanical ability can change coolant for very inexpensive. Less than 20 dollars for coolant. I'm told, Dex is very undesirable. I changed my DEX COOL system out to good ol Green Prestone tried and true. I had to flush it several times. The Dex Cool is apparently very bad on most components in a cooling system. Gaskets, plastic, etc. Dex Cool in my S-10 destroyed my radiator, heater core, and intake manifold gaskets. VERY BAD STUFF.