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Don't do that. You need to run a minimum of about 33% AF to 67% water (usual recommended is 50/50) in order to get the lubrication and anti-corrosion benefits. AF is not just for cooling.
Good to know, thanks. I was able to siphon the dillute coolant out of the block and get the proper mix. This morning I realized I had the car parked facing uphill which is why I wasn't able to drain the block... duh. Next time I'll face the car downhill.