Coolant System treatment

[Makdaddymac]

anyone know of any good coolant sytem treatments, i flush my system about 3 tumes and the coolant still aint bright green, it is still darkish i used the prestone flush which i think was colored water. So does anyone know of any good get the job treatments or flushes

 

[SVT32VDOHC]

It's not anything you're doing. It sounds like your radiator. My buddies 78 Mustang's coolant kept coming up brown/black after a while. He took his rad out, had it acid flushed and cleaned at a radiator shop, then installed new hoses and coolant and everything was fine afterwards.

Also...backflush your heater core. That holds crap in it too.

 

[7upstang91]

Really? Mine does the same. Someone told me that it might be a rusty block, wasnt really sure about that. Thats good to know, I need to replace my waterpump on Friday. But those two are next on the list right now. I need to get this cooling thing taken care of. An electric fan would be nice too.