Water in radiator rusty looking

[CMcAllister]

Originally Posted by 4406mopar

How do you clean out a rusty cooling system like the one described above. I'm looking to clean it in the car, not tear down the engine. Thanks

If you have an electric pump on it, drain it including pulling the plugs in the block. Refill with fresh water and a can of some type of cooling system cleaner. Circulate that for awhile and drain again. Circulate and run clean water through it until it runs clean. Refill and include a can of additive. Without block drains and an electric pump, it becomes a little more involved.

I used Justice Brothers products because I sold them and they worked well. Any quality anti-rust product should prevent the coolant from turning to mud.