[Purdy Swoft]

I had a chirping sound that sounded like a chirping , slipping fan belt . It turned out to be the seals in the rear water pump bushing . I use the rear bushing that uses two seals in the water pumps that I rebuild for our model A's. I don't use antifreeze in warm weather because it increases cooling system temperatures . I was running water as a summer coolant .I added a small bottle of water pump lubricant , soluble oil , to the radiator and the chirp went away. Soluble oil also prevents rust in the cooling system . Works for me in all of our model A's .