Good to know this thread is still of use.Thanks Tinker for the great instructions. I did the flush today, only had to flush twice as was not too bad on my 2012 Voyager with 13,300 miles. Filled with Engine Ice and hope to be good for a few years. Changed spark plugs and put chrome polish on heads as long as it was apart too. Nice feeling to have this done.
I changed the plugs on my first one too. It was a waste of money. The plugs in it are probably good for 100k miles.