1737 1964-1974 AMC Jeep 232 & 258 CW water pump

The 1737 pump has an impeller with an increased vane count and a reduced impeller vane clearance.  It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids.  FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot 258 engine? Because it has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures. From 0-3,300 RPM…Nothing Beats a FlowKooler! General Specifications: Type of Material of Pump Body Cast Iron Number of Blades on Impeller 8 CNC Aluminum Direction of Rotation CW Fan Hub Working Height 3-7/8" Shaft Diameter 5/8" Inlet Outside Diameter 1 7/8" Hose Connections: 1st 2nd Gender M NA Diameter 5/8" NA Threaded No NA Other Sp