In process of a coolant flush/refill and wondering if it is possible/worth the effort to get 100% of the rust out.
I drained system by removing the lower-radiator-to-thermostat-housing hose and crossover-to-thermostat-housing hose (I get 2 gallons out this way). I left the lower-radiator-to-thermostat-housing hose off and added garden hose (soft) water to the crossover bung. Ran engine for 15min, although water was clear after 5 min. Drained, added 2 gallon distilled, got up to temp with a 5 mile drive, let cool for 5hrs, drained and check water. The water in the radiator is mostly clear, but the water in the block still has some rust. I repeated this cycle 4 times with 8 gallons of distilled.
So, do I:
1) Stop worrying and add antifreeze (Ford gold). It would be way better than it was.
2) Start over and flush again with garden hose
3) ?
I drained system by removing the lower-radiator-to-thermostat-housing hose and crossover-to-thermostat-housing hose (I get 2 gallons out this way). I left the lower-radiator-to-thermostat-housing hose off and added garden hose (soft) water to the crossover bung. Ran engine for 15min, although water was clear after 5 min. Drained, added 2 gallon distilled, got up to temp with a 5 mile drive, let cool for 5hrs, drained and check water. The water in the radiator is mostly clear, but the water in the block still has some rust. I repeated this cycle 4 times with 8 gallons of distilled.
So, do I:
1) Stop worrying and add antifreeze (Ford gold). It would be way better than it was.
2) Start over and flush again with garden hose
3) ?