SKU: 19983762158

1684 1966-1980 Chevy GM 366 427 water pump

Sale price$2783.25 Regular price$3092.50
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

1684 1966-1980 Chevy GM 366 427 water pumpBig 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

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
  • Alternative Part Numbers 3890018, 3927565, 3990992, 6258548
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
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 19983762158

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Domingo
Whiting, US
★★★★★ 4
Good quality for small amounts of espresso
Color: 02_ Black 1pc
So truth be told I dont even use it because I actually needed something that held a lot more than what this holds but it is really nice.
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Reviewed in the United States on April 17, 2026
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Loretta D Anderson
Phoenix, US
★★★★★ 5
I like Quality
Color: 01_ Silver 1pc
It’s made very well, haven’t used it yet but I am sure it will meet all my needs.
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Reviewed in the United States on April 24, 2026
J
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Jesus Mata
Waukegan, US
★★★★★ 5
Shot de espresso
Color: 05_ Black 2pc
Hermosas para baristas
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Reviewed in the United States on May 19, 2026
J
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Jeanette
Dallas, US
★★★★★ 5
Perfect for espresso shots
This measuring cup is small, accurate, and very well made. The markings are clear and easy to read. The size is perfect for pulling double shots and measuring milk. The handle feels sturdy, and the design is clean and modern. Great quality for the price, works exactly as expected.
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Reviewed in the United States on July 24, 2025
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Verified Purchase
Josh
Lake Worth, US
★★★★★ 5
Great Product
Color: Black, Size: 6.8oz
The Mongdio Espresso Measuring Cup is a thoughtfully designed tool that prioritizes precision and comfort. The combination of durable stainless steel, cool-touch walnut handle, dual pouring spouts, and internal gradations makes it both functional and elegant. While detailed customer insights are currently limited and availability can be hit-or-miss, its build quality and design suggest excellent value for home baristas or anyone seeking better control in espresso preparation. Who Might Love It: • Home baristas using compact espresso setups • Coffee lovers needing accurate measurements without turning to scales • Anyone appreciative of stylish, functional kitchen tools Things to Consider: • If you rely heavily on user feedback or want fast shipping, check availability first • For larger batches, choose the 6.8 oz option if available
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Reviewed in the United States on August 10, 2025

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