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Yes, always. It's been 3 months, all is well.

John105, it's a 7 quart system. About 3 quarts comes out when doing a drain. When you then add full strength coolant, you theorectically are back to 50/50. Using distilled water isn't about saving money, it's about getting out the old coolant. In the Hyundai service manual link above, they...

There weren't any problems with the car. In my earlier years as a road warrior I was stranded on the side of the road twice because of locked up thermostats, which has made me a bit leery of trusting them. I changed this one a bit earlier than normal, but with another winter coming, it's cheap...

I think I'm out of the woods with this issue. The last time I added a few ounces of coolant was the day before starting this thread. I was planning to do the no-spill funnel process yesterday, but I noticed the level in the recovery tank hadn't moved at all. And unlike before, the coolant in the...

Well, I sure feel like an idiot for not researching this before I did the job. Thank you SO MUCH for the responses. I have the 2.4 engine, no hybrid. I just read the procedure. I know what I'll be doing tomorrow. The videos were great too. I'll report back. Again, thanks!

A week ago I did a coolant flush and fill and replaced the thermostat on my 2019 Hyundai Sonata, 4 years old, 62K. After my first trip, once the car had cooled down overnight, the coolant recovery tank was about a cup low, which I expected, as air would be bled out. I topped it off. Since then...