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Background, I have owned this 04 Excursion 6.0 diesel since new, it is in mint condition and looks great with 122,000 miles on it. I have since day one have had it serviced at a local shop here every 3000 miles and have always asked please check all the fluids and they say everything looks good. Present, last month before a trip trip to memphis I had it serviced, the guy in charge showed me the coolant reservoir and it was very rusty looking and the fluid was very thick. They flushed it 2-3 times and said it would be good for a while. On my my to Memphis and noticed a coolant odor, I pulled over in the rest area and the reservoir was over flowing, next morning had it flush again at a local shop and they said it will be fine. I drove from Memphis to KY and back to S. Florida and noticed it was rust color again but not THICK.. Last week brought it to a Ford dealer and they said they would not flush it because the block was corroded and that it would happen again but OFFERed to sell me a brand new long block with new radiator , water pump ect for 22K.. After a few phone calls I was advised to bring it to a local shop, 2 days ago they flushed it and said drive it for a few weeks and bring it back to be flushed again.. now to days later the coolant looks rusty … I have read where some placed do a real through job and drain the block and thermostat and flush with VC9 and it takes 3-4 to do,,, what do some of you think and why wold Ford not even attempt it.. Thank you
I have flushed mine 3 times with VC9 and the coolant came out black all 3 times. It took 48 gallons of distilled water to clear up each time. I always backflushed the heater core each time. Do this at your own risk, but I don't have any problems. I also run a coolant filter.