[Joluma09]

So I’m in the process of flushing my old coolant out because I noticed that it’s dark.ran distilled water for a few hours and drained did that a few times. Filled back up with distilled water for final drain. I went to drain it today a few days later and there was some brown build up. It’s not milky. Cas hasn’t over heated. There is no oil/coolant mixture on the dip stick or the oil cap.car doesn’t get hot. Any suggestions? Thanks

2005 Durango 5.7 2wd.

 

[mayhem]

You refilled it with just distilled water and let it stay in there for days? I don't think that's correct, you should have just flushed it once or twice and refilled it with the proper mix in my opinion.

 

[Don Fox]

As Mayhem said, you don't want plain water in there very long, as it will react with the steel/iron parts, and begin to rust.
What engine, and how many miles on your D? While you are in there, I would throw in a new oem T stat. The gold G-)% coolant is an excellent replacement for the oem spec fluid. If you have the 4.7, getting the air out is a bit more complex than the 5.7, but both are very doable.

Don

 

[Joluma09]

As Mayhem said, you don't want plain water in there very long, as it will react with the steel/iron parts, and begin to rust.
What engine, and how many miles on your D? While you are in there, I would throw in a new oem T stat. The gold G-)% coolant is an excellent replacement for the oem spec fluid. If you have the 4.7, getting the air out is a bit more complex than the 5.7, but both are very doable.

Don

it’s distilled water,not from the garden hose.Yeah I got a newT-stay,water pump and new clutch fan.Has 124k and 5.7. Thanks for the help.

 

[DuRonbo]

Zerex G-05 FTW !

Valvoline ZXG05RU1 Zerex G-05 Formula 50/50 Ready to Use Antifreeze / Coolant - Gallon Jug

Or Full strength mix with distilled water......

Zerex G05® Full Strength Concentrate Antifreeze / Coolant, 1 Gallon