Living the dream
Yet another cooling system problem. I've searched the forum and found many cooling system problems and solutions but none seem to be exactly like the one I'm having. My cooling system is puking into the overflow tank but not sucking it back in when it cools. I'm using a 21# cap on the radiator and have plugged the bung. I'm using a 16# cap on the T-filler. I followed the recommended method for filling the system with the radiator cap off until it overflows and then putting the cap on the radiator and topping off the system. I've checked that my hose is connected to the correct tube on the overflow tank. I don’t think I have a leak in the system because when I take the T filler cap off once the system has cooled it makes a suction sound (like opening a new jar of Planters Peanuts). I even tested the cap by sucking on the check valve to make sure it would let air pass in. Any ideas?