RWThomas1,

To get the old water/antifreeze out I flushed with water and a cleaner, filling and emptying twice. I hooked up a hair dryer to the heater core hoses an let it run for 24 hours. I also hooked the dryer to the filler neck and let the warm air circulate thru the engine and radiator and out the 2 drain holes

I had no trouble filling the 300SD but the 300SDL 6 cylinder engine was more difficult as they are known to be. I just kept running it and adding a little at a time until it was full.

No, I didn't circulate propylene glycol thru the systems first. Evans coolant NPG+ is 85% proylene glycol.

No other issues but is did take me days to do the conversion because of the slow drying process I used. A quicker way would be to fill with Evans after the flushing and run the engine above 212F, the boiling point of water by partially blocking the radiator with a piece of cardboard. This will boil the water out of the system.

P E H