I drained the Thermocure mix. It had been sitting in there for a week and it was pretty nasty. I also took out the t-stat to get unrestricted flow. The t-stat collected a bunch of crud too. Then, I backflushed the entire cooling system for about 20 minutes with a garden hose. I then ran it for another 30 minutes with the garden hose attached to flush the entire system thoroughly with clean water. I drained the water from the radiator and then removed the engine block drain plug. I was worried that was going to be an issue because I thought I had possibly crossthreaded it last time. Nope, it came out fine and got the block drained. At this point, there should be almost no water in the entire cooling system. Put the drain plug back in and filled it up with distilled water.
I'm now on my 3rd cycle of running distilled water through the cooling system. Even after the 1st flush, the water was fairly brown. I only wanted to do 3 flushes with distilled before filling with coolant, but I am probably going to keep flushing it with distilled until it is clear, or nearly clear. Then, the t-stat goes back in and it gets filled with coolant.
I'm so ready to be done with this stupid cooling system.
I'm now on my 3rd cycle of running distilled water through the cooling system. Even after the 1st flush, the water was fairly brown. I only wanted to do 3 flushes with distilled before filling with coolant, but I am probably going to keep flushing it with distilled until it is clear, or nearly clear. Then, the t-stat goes back in and it gets filled with coolant.
I'm so ready to be done with this stupid cooling system.