Mud Brown Coolant

[cwlehner]

Hi Everyone,

I am in the process of changing my water pump on my 85 6.2 Turbo. The coolant that came out of the radiator is a muddy rusty brown (almost milkshake) color. Is this indicative of anything?? The oil is fine and when I unbolted the water pump some coolant spilled out that was a nice green color. There didn't seem to be hardly any residue inside of the engine cooling passages and the radiator looks to be in good shape. Any thoughts??

Thanks!

[DmaxMaverick]

If the mud you got was from the radiator drain, it's normal for a high miler. The radiator tank will retain sediment. The good indication is the healthy green coolant inside the engine.

[cwlehner]

whew!

Thanks!!

[john8662]

Also "stop leak" type things will do the same thing, and form sediment at the bottom of the radiator tank as you've seen. Bars leak (emulsified) comes to mind here...