Can I flush out an aluminum radiator with vinegar or some other chemical?

The aluminum radiator on my drag car is 11 years old. It is currently out of the car. I have a kit to flush out a tankless water heater that involves using a 5 gallon bucket a submersible pump and vinegar. I was wondering if I could use this kit to flush out my radiator. Since it recirculates I can leave it running as long as I want. Is there another chemical that would be better than vinegar?