I have a 1999 chevy Suburban that is having a coolant issue. I found a crack in the top of the radiator hose neck. Its the metal part the hose attaches too. My system doesnt leak because it does not really pressurize. My temperature gauge never climbs out of normal operating range even when climbing mountains even under load. I have never over heated and never “hurt” the engine. It has 228k. So if it dies it dies, i have another to swap in. My question is, is the huge water pump pumping enough water to keep my engine safe and i guess what should I look for “indicators” that the back of the engine block is not getting “cool” enough. I have had this issue for 2 years really, and it just stays full of water just up to a certain point. If i flush it and put in 2.5 gallons 3-4 cups of fluid seep out of the crack and that is all. When looking into the radiator i can see the top of the “coils” bearly covered. Not having any real issues but I am curious as to what others think I should do. I have a donor truck exact same as mine with a 100% radiator. Parts are not an issue.