Dave Kay
Adventurer
Can anyone explain this; Installed a bigger, re-cored radiator in Jan '09, all new hoses, flushed the system, filled w/50-50 Dexcool and distilled water. First time using this stuff but for some reason I was told it's better than the green stuff even for older rigs. (GMC 1986) The truck hasn't been driven more than 10k miles since that work was done and the cooling system was full whenever I popped the cap...
Fast-forward to today----- I'm changing out the thermostat and to my utter shock and amazment I discover that my entire cooling sytem is FULL of some kind of rusty residue--- clinging to everything--- I mean the stuff is thick! What the???? Inside the radiator walls it's coated with this stuff and YET, the coolant that I drained into a bucket looks clean and new.
What have I got here and how do I get rid of it? Help, anybody?
Fast-forward to today----- I'm changing out the thermostat and to my utter shock and amazment I discover that my entire cooling sytem is FULL of some kind of rusty residue--- clinging to everything--- I mean the stuff is thick! What the???? Inside the radiator walls it's coated with this stuff and YET, the coolant that I drained into a bucket looks clean and new.
What have I got here and how do I get rid of it? Help, anybody?
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