Well my 01 Cruiser's (64,000 miles) radiator and thermo were leaking. Picked up a local thermo at the dealer and order an Asian radiator for $99.00 off e-bay. A local cooler specialty shop did the work for $200 less than the dealer.
They found the radiator had been installed improperly mostly leading to its failure. BUT, they had to flush out my motor coolant twice because of all the dirt they found in the system. Very unusual they said. I have only used mineral free water and Chrysler coolant (100,000 mile stuff).
Perhaps the factory coolant is not what it is cracked up to be (or perhaps its that Mexican water). If you own a Cruiser you may want to flush and change the coolant sooner than later. By the way, they found changing the thermo much harder to do than just about any other vehicle they have worked on; hard to get to.
Richard.