U-Cooler Assembly | Crusader 98570 Combination transmission and engine oil cooler used on Crusader big block multi-port injected fresh water cooled marine engines. OEM Crusader u-cooler assembly Fits Crusader big block multi-port injected fresh water cooled marine engines 1-1/4 in. water hose connection Includes 1/4 in. NPT zinc anode Original Crusader