I can't remember the last time I changed out the engine coolant, (2.5l btw). It was probably done about 50,000 miles ago, (when I blew a radiator hose on the highway and lost most of it).
Anyway, I was thinking about draining the coolant entirely, then filling it with GHW-100 (Garden Hose Water 100%), and then running the engine for a bit, then re-draining that fluid and filling it back up with the good stuff, (Prestone 50/50). Does that sound like a viable plan or is that not doable? Never done a coolant drain before, so let me know what you think is best
