I picked up a front clip with motor from someone in town locally for free, I decided to look at the motor and when i drained radiator it was all rusty and i noticed the engine had a little rust in the coolant lines and thermostat housing with kinda a goopy clear/ mold formations.

What would be the best way to clean it out, And ideas ... i would try to flush but i cant get the motor running in the clip

 

http://www.noxudolusa.com/rust_prote...rotection.html