SKU: 34894908858

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

Sale price$143.10 Regular price$159.00
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Description

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

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
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: 34894908858

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Reviewed in the United States on April 6, 2026
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H. Tellez
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★★★★★ 5
Worked Amazingly!
Needed it for an Army course and would have been lost without it.
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Reviewed in the United States on April 19, 2026
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K. J. Keough
Pawtucket, US
★★★★★ 5
Companion to the best map markers ever!
These are a must for minor corrections when using their pens!
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Reviewed in the United States on March 9, 2025
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Gouda
New York, US
★★★★★ 5
Didn’t know what to expect and was pleasantly surprised
Purchased to go along with the staedtler color markers. Mostly writing on laminate and loksaks. Works well and allows you to easily wipe off any permanent marker. Curious as to how long it’ll last. Keep a small cloth to wipe nib clean after use.
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Reviewed in the United States on February 21, 2025
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Doug
Grantham, US
★★★★★ 1
Waste of money
What a waste of money this was. After receiving this I was excited to try it out, my excitement soon turned to disappointment. No matter what I did, the only thing that I could get to come out was clear liquid. It immediately went into the trash. Save your money and just go buy the BIC correction pen.
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Reviewed in the United States on March 29, 2026

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