Freeze plug problems

[83hurstguy]

Originally Posted by X66 714

I'm still getting alot of garbage when I drain the block so I have a question.

Could I do any damage by pulling the thermostat, blocking off the water pump inlet & heater hose connections & filling the block with clean evap-o-rust?

Thanks again, Joe

Evaporust actually makes a cooling system cleaner:
https://www.evapo-rust.com/thermocure/

Not sure the difference between thermocure and the regular Evaporust product, but I don't see the regular product causing an issue. Guessing the thermocure has some changes so it can be used as temporary engine coolant.