Radiator Flush Question

It won't hurt the car, but honestly in my opinon..I would say that as long as you put the stuff in your car and drive it a few miles..letting the thermostat open and close a few times then you should be fine. This is because the cleaner has been run through the system a few times. They prolly suggest 4-6 hours for the best results. Most of the time I just flush mine with water and refill it with 50/50 mix. Most people don't ever do that to their cars in their life, so you doing what you are doing is a good thing and more than what most ppl do.

Thats cool man, hey I took a 160* T-stat out of my 91 GT when I had it because it made the car run funny. It ran too cool and it would not perform well..it bogged a lot when taking off. Plus I had NO HEAT!! I put a 180* in and it was a lot better..I had GT40 steel heads Cobra intake, MAC headers H-pipe no cats, BBK 70mm T-body and a 73MM C&L mass air and pullies. I don't know what your mods are, but I think the 160* was too much for my car.