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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 / 1681CI 1963-1977 Small Block Ford cast iron 5-9/16" water pump

1681CI 1963-1977 Small Block Ford cast iron 5-9/16" water pump

$141.78

1681CI 1963-1977 Small Block Ford cast iron 5-9/16
1681CI 1963-1977 Small Block Ford cast iron 5-9/16
1681CI 1963-1977 Small Block Ford cast iron 5-9/16
1681CI 1963-1977 Small Block Ford cast iron 5-9/16
1681CI 1963-1977 Small Block Ford cast iron 5-9/16
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1681CI 1963-1977 Small Block Ford cast iron 5-9/16" water pump

$141.78

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Small block Ford running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller, an increased vane count and a reduced casting-to-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 Ford 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 10 CNC Aluminum
Direction of Rotation CW (N.B. The casting shape and angle of vane prevents reversing flow of this pump)
Fan Hub Working Height 5 9/16"
Other Special Features:
  • 10 blade CNC Machined Aluminum impeller
  • Anodized with military grade surface coating
  • Directional impeller cavity to clockwise rotation
  • Lower radiator hose inlet on passenger side
  • The backing plate is included
  • See pump 1680 for the 1964-1967 hi po engine application
Parts Contained in Box:
Mounting Gaskets, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
FORD BRONCO 68-66 V8 289 4.7L
FORD BRONCO 77-68 V8 302 5.0L
FORD COUNTRY SEDAN 1969 V8 351 5.8L
FORD COUNTRY SEDAN 67-65 V8 289 4.7L
FORD COUNTRY SEDAN 69-68 V8 302 5.0L
FORD COUNTRY SQUIRE 1969 V8 351 5.8L
FORD COUNTRY SQUIRE 67-65 V8 289 4.7L
FORD COUNTRY SQUIRE 69-68 V8 302 5.0L
FORD CUSTOM 1969 V8 351 5.8L
FORD CUSTOM 67-65 V8 289 4.7L
FORD CUSTOM 69-68 V8 302 5.0L
FORD CUSTOM 500 1969 V8 351 5.8L
FORD CUSTOM 500 67-65 V8 289 4.7L
FORD CUSTOM 500 69-68 V8 302 5.0L
FORD E-100 ECONOLINE 74-69 V8 302 5.0L
FORD E-200 ECONOLINE 1972 V8 302 5.0L
FORD E-200 ECONOLINE 1974 V8 302 5.0L
FORD E-200 ECONOLINE 70-69 V8 302 5.0L
FORD E-300 ECONOLINE 1969 V8 302 5.0L
FORD E-300 ECONOLINE 1972 V8 302 5.0L
FORD E-300 ECONOLINE 1974 V8 302 5.0L
FORD F-100 1969 V8 302 5.0L
FORD F-250 1969 V8 302 5.0L
FORD F-350 1969 V8 302 5.0L
FORD FAIRLANE 1966 V8 289 4.7L
FORD FAIRLANE 1969 V8 351 5.8L
FORD FAIRLANE 69-68 V8 302 5.0L
FORD FALCON 68-67 V8 289 4.7L
FORD FALCON SEDAN DELIVERY 65-64 V8 289 4.7L
FORD FORD 300 1963 V8 289 4.7L
FORD GALAXIE 67-64 V8 289 4.7L
FORD GALAXIE 500 1968 V8 302 5.0L
FORD GALAXIE 500 1969 V8 351 5.8L
FORD GALAXIE 500 66-65 V8 289 4.7L
FORD GT40 1968 V8 289 4.7L
FORD LTD 1969 V8 351 5.8L
FORD LTD 67-65 V8 289 4.7L
FORD LTD 69-68 V8 302 5.0L
FORD MUSTANG 1969 V8 351 5.8L
FORD MUSTANG 68-64 V8 289 4.7L
FORD MUSTANG 69-68 V8 302 5.0L
FORD RANCH WAGON 1969 V8 302 5.0L
FORD RANCH WAGON 1969 V8 351 5.8L
FORD RANCH WAGON 66-65 V8 289 4.7L
FORD RANCHERO 1969 V8 351 5.8L
FORD RANCHERO 67-65 V8 289 4.7L
FORD RANCHERO 69-68 V8 302 5.0L
FORD TORINO 1969 V8 351 5.8L
FORD TORINO 69-68 V8 302 5.0L
MERCURY CALIENTE 67-66 V8 289 4.7L
MERCURY COMET 1969 V8 351 5.8L
MERCURY COMET 68-65 V8 289 4.7L
MERCURY COMET 69-68 V8 302 5.0L
MERCURY COMMUTER 1967 V8 289 4.7L
MERCURY COUGAR 1969 V8 351 5.8L
MERCURY COUGAR 68-67 V8 289 4.7L
MERCURY COUGAR 69-68 V8 302 5.0L
MERCURY CYCLONE 1969 V8 351 5.8L
MERCURY CYCLONE 67-66 V8 289 4.7L
MERCURY CYCLONE 69-68 V8 302 5.0L
MERCURY MONTEGO 1968 V8 289 4.7L
MERCURY MONTEGO 1969 V8 351 5.8L
MERCURY MONTEGO 69-68 V8 302 5.0L
MERCURY VILLAGER 67-66 V8 289 4.7L
MERCURY VOYAGER 67-66 V8 289 4.7L

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1681CI 1963-1977 Small Block Ford cast iron 5-9/16
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