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FlowKooler pumps patented impeller designs help stop engines from overheating and reduces engine temperature up to 30 degrees by doubling the flow of coolant and building system pressure.

Home / Products / 1688 1984-1991 SBC Corvette short shaft 3/4" shaft water pump

1688 1984-1991 SBC Corvette short shaft 3/4" shaft water pump

$141.78

1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
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1688 1984-1991 SBC Corvette short shaft 3/4" shaft water pump

$141.78

Flowkooler's pump 1688 for the small block chevy Corvette engine has a 16 blade skip vane impeller that is CNC machined from billet aluminum.  An increased vane count and a reduction in the plate-impeller clearance achieves greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps.  It is then surface coated with a military grade type II Class II anodized finish. 

FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot small block 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 Aluminum
Number of Blades on Impeller 16 CNC Aluminum
Direction of Rotation CW or CCW
Cast Iron pump alternatives 1688CI has a 3/8" accessory boss
1683 (has 12 o'clock heater port)
Fan Hub Working Height 5 3/4" 
Shaft Diameter 3/4"
Inlet Outside Diameter 1 9/16"
Hose Connections 1st 2nd
Gender F
Diameter 3/4" @ 9 o'clock
Threaded Yes
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller
  • Anodized with a military grade surface coating
  • Threaded 3/8" boss at 12 o'clock - this does not pass fluid (unless drilled)
  • Small-block Chevy "short" Corvette applications 3/4" shaft 
  • Shaft extends past the fan hub .465" like the OE
  • Alternative Part Numbers  10048919, 12522035, 14047008, 14069586, 14094538, 19168607
Make Model Year Block CID Liters
CHECKER MARATHON 1982 V8 350 5.7L
CHEVROLET CORVETTE 84-91 V8 350 5.7L

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1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
1688 1984-1991 SBC Corvette short shaft 3/4
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