SKU: 38633673462

1681 1963-1977 Small Block Ford Mercury 5-9/16" CW passenger side intake water pump

Sale price$136.78 Regular price$151.98
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Description

1681 1963-1977 Small Block Ford Mercury 5-9/16" CW passenger side intake water pumpSmall block Ford running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller for the CW rotation. It has an increased vane count and a reduced casting to impeller vane clearance to achieve 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

Small block Ford running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller for the CW rotation.  It has an increased vane count and a reduced casting-to-impeller vane clearance to achieve 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 Aluminum
Number of Blades on Impeller 16 CNC Aluminum
Direction of Rotation CW
Fan Hub Working Height 5 9/16"
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller
  • Anodized with military grade surface coating
  • Directional impeller cavity oriented to a clockwise rotation
  • Lower radiator hose inlet on passenger side
  • BACKING PLATE IS INCLUDED
  • See pump 1680 for the 1964-1967 289 Hi Po engine application
  • Alternative Part Numbers C5AZ8501E, C5AZ8501H, C5AZ8501L, C5AZ8501P, C5AZ8501T, C5OE8505B, C5OZ8501B, C5OZ8501C, C5OZ8501D, C5OZ8501E, C5OZ8501F, C5OZ8501G, C5OZ8501H, C6OE8505A, C6OE8505B, C8AE8505J, C8OE8505D, C9AZ8501A, C9AZ8501B, C9ZZ8501A, D3UZ8501A
Parts Contained in Box:
Mounting Gaskets, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
FORD FORD 300 1963 V8 289 4.7L
FORD FAIRLANE 1966 V8 289 4.7L
FORD GT40 1968 V8 289 4.7L
FORD FALCON SEDAN DELIVERY 65-64 V8 289 4.7L
FORD GALAXIE 500, RANCH WAGON 66-65 V8 289 4.7L
FORD GALAXIE 67-64 V8 289 4.7L
FORD COUNTRY SEDAN, COUNTRY SQUIRE, CUSTOM, CUSTOM 500, LTD, RANCHERO 67-65 V8 289 4.7L
FORD MUSTANG 68-64 V8 289 4.7L
FORD BRONCO 68-66 V8 289 4.7L
FORD FALCON 68-67 V8 289 4.7L
MERCURY COMMUTER 1967 V8 289 4.7L
MERCURY MONTEGO 1968 V8 289 4.7L
MERCURY CALIENTE 67-66 V8 289 4.7L
MERCURY CYCLONE, VILLAGER, VOYAGER, 67-66 V8 289 4.7L
MERCURY COMET 68-65 V8 289 4.7L
MERCURY COUGAR 68-67 V8 289 4.7L
FORD GALAXIE 500 1968 V8 302 5.0L
FORD E-300 ECONOLINE, F-100, F-250, F-350, RANCH WAGON 1969 V8 302 5.0L
FORD E-200, E300 ECONOLINE 1972 V8 302 5.0L
FORD E-200, E300 ECONOLINE 1974 V8 302 5.0L
FORD COUNTRY SEDAN, COUNTRY SQUIRE,CUSTOM,CUSTOM 500,FAIRLANE,LTD,MUSTANG,RANCHERO,TORINO 69-68 V8 302 5.0L
MERCURY COMET,COUGAR,CYCLONE,MONTEGO 69-68 V8 302 5.0L
FORD E-200 ECONOLINE 70-69 V8 302 5.0L
FORD E-100 ECONOLINE 74-69 V8 302 5.0L
FORD BRONCO 77-68 V8 302 5.0L
MERCURY COMET, COUGAR, CYCLONE, MONTEGO 69-68 V8 302 5.0L
FORD COUNTRY SEDAN 1969 V8 351 5.8L
FORD COUNTRY SQUIRE 1969 V8 351 5.8L
FORD CUSTOM, CUSTOM 500, FAIRLANE, GALAXIE 500, LTD, MUSTANG, RANCH WAGON, RANCHERO, TORINO 1969 V8 351 5.8L
MERCURY COMET, COUGAR, CYCLONE, MONTEGO 1969 V8 351 5.8L
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: 38633673462

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4.8 ★★★★★
Based on 26 reviews
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C
Verified Purchase
ChristianPablos
Lexington, US
★★★★★ 5
Muy bueno
Muy bueno
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2025
D
Verified Purchase
Diane Lee
Waukegan, US
★★★★★ 4
Great little temper
Size: 53mm, Color: Silver
Works great! Only problem is that it doesn’t have that feel of tamping. Wish I had more feedback. It just goes down very easily and doesn’t have that feeling of solid tamping. Now that doesn’t mean it’s not doing its job. Works fine but would like some manual feedback.
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Reviewed in the United States on November 7, 2024
J
Verified Purchase
Johamis
Grantham, US
★★★★★ 5
Easy to use
Size: 58.3mm, Color: Black
Great for make good coffee and easy to use.
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Reviewed in the United States on October 24, 2025
J
Verified Purchase
JK
Boise, US
★★★★★ 5
Take the guess work out of the flow!
Size: 58.3mm, Color: Black
I got this because when my wife makes espresso, it's watery. When i make it, it's fine. We needed a controlled Tampering method so we both do the same job. This is heavy, and being able to use the whole hand instead of fingers, not much effort is needed. Since we purchased this, we were able to make consistent espresso shots for sure.
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Reviewed in the United States on July 12, 2024
R
Verified Purchase
Reviewer JR
Whiting, US
★★★★★ 3
Not as good as I expected
When it first came, the box fell apart as I was taking it out, and a lot of some kind of dirt or sand kept falling out all over my table and floor. I had the take the entire thing apart and thoroughly wash it. After drying age reassembling it, I tried it on my portafilter that came with my Breville Barista Express, but, somehow, it doesn't always make the tamping level. You would think with the ridge that rests on the side of the portafilter that it would force it to remain level, but, somehow, it doesn't, at least not consistently. It also has varying lengths (heights, or depths), and a single spring tension, so you may still over tamping or under-tamp. I was expecting it would have a censor that would just detect once it reached 30 lbs of force and cut off after that, similar to a torque screwdriver, but that's not what this is. I'll still give it 3 stars because, despite the problems mentioned above, it at least produces some amount of consistency, even if that isn't measurable; but, I can't give it 5 stars because of those issues mentioned above.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2025

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