[bepperb]

If you haven't done it already, once you drain and refill with distilled water remember you need to drive around until the engine gets hot enough for the thermostat to open. I also turn the heat on, but I believe with the HL coolant is always flowing through the heater core. I wouldn't mess with the "t" type flush, it's one more point of failure down the road.

My advice would be to replace the thermostat as well, if you haven't already. It's cheap. I personally wouldn't replace the hoses yet, these days they should last a decade. My carolla with 213k had original hoses, and old man Brown's camry with 258k has them as well.