EJ20 engine. I flushed the coolant but not the block drain plugs: will it freeze?

[totem]

Hey guys,

I’ve got a 2000 Subaru Legacy 2.0 (EJ20) in Sweden. It’s leaking coolant (from the water pump? https://photos.app.goo.gl/ASygy9bA698xTB8h7), so I was running it on water. Before leaving the country for a few months, I drained the system to avoid freezing, but I didn’t open the block drains, so there’s probably still some water left.

While draining, I lifted the car from both sides (was changing to winter tires), so maybe that helped a bit.

Questions:

1) Is the leftover water amount negligible?

2) If I add pure coolant (how much?), will it reach and mix with that water?

3) Will any remaining water leak out on its own?

If not, I guess I’ll need to ask someone to refill it properly (and let it leak).

 

[Raymond3006]

If you are "abandoning" the critter for multiple FRIGGED Winter Months , may as well just do a complete FILL with the most concentrate that your area needs on the WORST WINTER ! There-in will be you Safety-Margin , and if
it does "leak" , it will be taking some of the Extra Water along for the Ride !!!
Come next spring, just go back to your usual What-The-Heck process .......... !!!
At least your Block will still be Good-To-Go !!!!!