SKU: 13110018341

1620 1962-1966 Buick 401 425 Nailhead water pump for AC cars

Sale price$164.32 Regular price$182.58
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Description

1620 1962-1966 Buick 401 425 Nailhead water pump for AC carsFlowkooler high flow pump 1620 for the Buick Nailhead has a CNC machined billet impeller designed with an increased vane count and a tighter impeller 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

Flowkooler high flow pump 1620 for the Buick Nailhead has a CNC machined billet impeller designed with an increased vane count and a tighter impeller 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 Pontiac 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 vanes on Impeller 12 swept
Direction of Rotation CW
Fan Hub Height 3 9/16"
Shaft Diameter 5/8"
Hose Connections 1st 2nd
Gender m NA
Diameter 3/4" NA
Threaded No NA
Other Special Features:
  • Fits early-mid-1960s Buick V8 Nailheads with AC
  • 12 blade CNC Machined Aluminum impeller system
  • Impeller anodized with Military grade Type II Class II surface coating
  • Alternative Part Number 1389590,5513139, 58108, 58109, 58608, 513017, AW770, 181006, FP1316, 1309590, 42563, 1389590, 311063, C309590, 42563,
Parts Contained in Box:
Mounting Gasket, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
buick electra 63-62 All All All
buick electra 66-64 V8 401 6.6L
buick electra 66-65 V8 425 7.0L
buick lesabre 63-62 All All All
buick riviera 65-63 V8 401 6.6L
buick riviera 66-63 V8 425 7.0L
buick wildcat 66-64 V8 403 6.6L
buick wildcat 66-64 V8 425 7.0L
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: 13110018341

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4.7 ★★★★★
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vivian johnson
Omaha, US
★★★★★ 5
Very good product
Style: 36 Sqft 80 mil
Easy to install, very sticky. Will buy again.
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Reviewed in the United States on May 20, 2026
S
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Samantha
Phoenix, US
★★★★★ 5
Works well and doesn’t break the bank
Style: 36 Sqft 80 mil
Awesome value for low budget wound deadening. Used this under the floor mat on my international 4300 and there is a noticeable difference in sound inside the cab.
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Reviewed in the United States on May 5, 2026
M
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Miguel Rojas
Draper, US
★★★★★ 5
It works
Style: 36 Sqft 80 mil
Great product
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Reviewed in the United States on May 9, 2026
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Verified Purchase
James Ping
Houston, US
★★★★★ 4
Good product
Style: 18 Sqft 80 mil
Good sound deadening for the money..
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Reviewed in the United States on March 23, 2026
A
Verified Purchase
Amazon Customer
Lowell, US
★★★★★ 5
Easy to install
Style: 18 Sqft 80 mil
Easy to work with, sticks well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026

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