My first leak at the front was a thermostat housing leak. Replaced gasket, put in new coolant, still leaked. Replaced gasket with coating of thermostat gasket sealant, new coolant again, finally stopped leak. Within a year, water pump leaked. There's lots that can leak up front. Regarding heater hose T's, I figure the ACDelco one on my Tahoe lasted a good 15 years, replacement ACDelco T's should last until my next coolant change easily. I don't like the system, but it seems to work. Ford uses the same style connections and they run their cooling systems (at least the 4.6L V8) at 20 psi.