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1684 1966-1980 Chevy GM 366 427 water pump

$149.00

1684 1966-1980 Chevy GM 366 427 water pump

$149.00

Big blocks in big trucks need big cooling. We designed the 1684 pump for the 366 and 427 ci blocks.  It has an impeller with an increased vane count and a reduced impeller vane clearance to take care of the problem.  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 Corvette 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 16 CNC Aluminum
Direction of Rotation CW or CCW
Fan Hub working height 6 15/16" "long"
Shaft diamets 3/4"
Hose Connections: 1st 2nd
Gender F F
Diameter 1" 3/4"
Threaded Yes Yes (in bypass)
Other Special Features:
  • 16 blade swept vane CNC Machined Aluminum impeller
  • Impeller protected with a military grade Type II class II surface coating
Parts Contained in Box:
Mounting Gaskets, By-pass Housing and Gasket,1" to 3/4" Reducer Bushing, 3/8" x 1 1/4" Bolts (2), Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
chevrolet c30 pickup 1966 V8 366 6.0L
chevrolet med/hd series 40 72-68 V8 366 6.0L
chevrolet med/hd series 50 72-66 V8 366 6.0L
chevrolet med/hd series 50 80-69 V8 427 7.0L
chevrolet med/hd series 60 72-66 V8 366 6.0L
chevrolet med/hd series 60 80-69 V8 427 7.0L
chevrolet med/hd series 65,70,80 80-69 V8 427 7.0L
chevrolet p20 van 1967 L3 159 2.6L
chevrolet p30 van 1967 V8 366 6.0L
chevrolet p30 van 67-65 L3 159 2.6L
gmc all 75-79 V8 366 6.0L
gmc all 75-79 V8 427 6.0L
gmc series 50, 60, 65 66-72 V8 366 6.0L
gmc series 50, 60, 65 73-74 V8 366 6.0L