I've got a 1991 school bus with a CAT 3116 that gets a little hot on the highway and the stop engine light comes on. Only the top 25% of the radiator gets hot while the bottom remains very cold.
I've read about people using bleach, vinegar, and citric acid, among other things to clean their radiators, but some of these seem very harmful to the engine and cooling system.
- Has anyone used sulfamic acid to clean out a radiator?
- What are the pros/cons of using sulfamic acid for this purpose?
My radiator is steel, about 30" x 30" x 4".