Origional radiator on 1958 641 started seeping coolant so I decided to replace it since I couldn't find a shop to recore it. Ordered new radiator,cap,t-stat and hoses from YT then finished it off with fresh extended service anti-freeze and distilled water. After sitting out a couple round bales and moving creep feeder,I noticed coolant dripping when I parked it. Drip was comong from water pump so I ordered a new pump and installed it. Next time I used it was pulling a 3 bottom turning plow and it blew the lower radiator hose off pump. Auto parts house cap tester pegged at 35 psi and the new 4 psi cap had never released pressure. Noooo I didn't take the new cap to have it tested before I used it on nor did I test hoses and radiator for leaks before installing them. I'm hoping radiator and t-stat are higher quility.