Brown in radiator fluid

[Bessesen2]

I looked in my radiator and I noticed brown heavier chunks inside. (The car still has orange dexcool also). To my knowledge, it could be stop leak? Buy either way I plan on doing a system flush and put unviversal Prestone in the system

 

[dsmuts]

Could be stop leak or the dexcool gelling up. Do a coolant flush.

 

[Scottydoggs]

when dex coolant has air in the system, it boogers up. like snot balls lol

flush the engine and rad, then add green coolant.

 

[Tony Mendez]

Flush that system like scotty said. DEX COOL has an organic compound that gets destroyed when tap water is added to it, basically ruining the coolant.