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1937-48 Flathead Stock-Style Water Pump with Wide Belt

Specs
Material Type:
Steel
Sold in Quantity:
Each
Finish:
Painted
Groove Count:
1
Water Pump Style:
Short
Water Pump Type:
Mechanical
MFG. Part #:
-
Gasket(s) Included:
Yes
Overall Height:
9.00
Shaft Diameter:
0.63
Mounted Length:
3.31
Hose ID:
1.75
Belt Width:
0.63
Pulley Diameter:
4.35
Notes
Includes motor mount flange. 1.00" from engine side of pulley to mounting flange.
1937-48 Flathead Stock-Style Water Pump with Wide Belt
1937-48 Flathead Stock-Style Water Pump with Wide Belt
1937-48 Flathead Stock-Style Water Pump with Wide Belt
1937-48 Flathead Stock-Style Water Pump with Wide Belt
1937-48 Flathead Stock-Style Water Pump with Wide Belt
1937-48 Flathead Stock-Style Water Pump with Wide Belt

Click image to enlarge

Details

Reviews (8)

Q & A (4)

What's in the Box

Info

Original Flathead water pumps have always suffered from unreliable bronze bushings and carbon seals. They almost always leaked and even Ford manuals warned mechanics not to tighten fan belts too tight. The excess slack allowed belts to slip and lose contact with the generator and water pump pulleys, causing more cooling and power problems.

Speedways completely new water pumps feature severe-duty roller and ball bearings, close tolerances and modular impellers to provide maximum flow and reduce cavitation. They also have modern ceramic seals on a heavy duty 5/8" shaft, making the assembly exceptionally strong and more efficient. All mounting areas are spot faced for improved fit and sealing.

  • All-new high-nickel iron castings
  • Severe-duty roller and ball bearings
  • Ceramic seals on sturdy 3/4" shaft
  • High-flow modular impeller reduces cavitation
  • Gaskets included
  • For systems with 5/8" drive belts

Factory replacement for 1937-1948 Ford and Mercury cars and trucks. Includes gaskets.

Water Pump Features (GIF)

910-15593 Instructions (PDF)

Item Details

For Wide Belt Applications, Gaskets Included

Warranties

Note: Removing the pulley voids warranty.

Customer Reviews

Rated 4.4 out of 5 by 8 reviewers.
RATING BREAKDOWN
8 reviews
5 Stars
6
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
1
RECOMMEND THIS PRODUCT:

Goinabflatbroke
Verified Purchaser
Verified Reviewer
Chattanooga, Tn.

Too Cool for my Old School Hot Rod

October 19, 2016
Struggled with fit & leaks for a long time. I have a nostalgia roadster & the pumps look great on my 1946 flathead.
Pros:
  • Noooooooo Leaks
  • Came Already Painted
  • Great Design Fit
Cons:
  • None
Yes, I recommend this product.
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Ta
Verified Purchaser
Sharpsburg Ga

Product is good and time of delivery good

August 24, 2016
Had very good delivery time
Yes, I recommend this product.
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Tom1429
Houston, TX, USA

This product worked great. No leaks cool

April 06, 2015
It is a water pump, pumped water, did not leak. I am happy. NOW THIS IS WHAT YOU WANT TO READ ! How many auto parts stores can you hardly wait to deal with ! I can hardly wait till I need something so I can see if Speedway Motors has the part. The Smith Family Knows how to take care of their customers. Fast, friendly service, quality parts, unbeatable prices, and I can not beleave their shipping. So Fast ! I swear they have the guy setting there waiting for them to hand him the package. I can not speak Highly enough about the Speedway Motor Family. You are making your Mom and Dad so Proud !
Yes, I recommend this product.
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Norm31
Lexington,Ky. USA

1932 thru 1948 V8 water pumps

October 05, 2014
Your new pumps started leaking after a few thousand miles with in a couple of weeks from each other. I have used the original truck pumps with good service for many years before trying your pumps and will be going back to them. Norm
Cons:
  • not happy with them
No, I would not recommend this product.
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Merchant Response:

Norm31 - Thank you for your feedback. We are sorry to hear that the water pumps did not meet your expected standards. We are glad to help resolve quality issues experienced though refund/exchange options with any of our items purchased within our standard 1 year warranty. Unfortunately, the pumps were purchased in 2007 and therefore; Speedway Motors cannot issue a refund/exchange as it has been over the 1 year warranty period the from date of purchase. We apologize for any inconvenience this may have caused. For further assistance or questions, please contact us at 1.800.979.0122 to speak to a customer service representative.
oddball
Verified Purchaser

parts

October 05, 2014
The water pump and gaskets worked just fine,I will need more parts thank you for the fast service.
Yes, I recommend this product.
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len47merc
Raleigh, NC, USA

Excellent quality product with great enh

May 26, 2014
Product bolts on and performs flawlessly. Will not pass muster for originality in judging competitions but functionally is on the mark. Body of the pump will need painting to match original Ford/Mercury blue (or green), and as well the end of the shaft in the middle of the pulley wheel requires painting black to maintain the fundamentals of originality. Given the wheels are cast the black semi-gloss finish is correct for the pulley only. Given my motor is new I am running a bit warmer than previously as expected (during break-in) so cannot comment at this time on the increased flow performance of the pumps. Performance to-date since install has been excellent.
Pros:
  • As advertised
  • Finish
  • Quality of product
Cons:
  • having to paint the body required tedious masking
Yes, I recommend this product.
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Harley48
Verified Purchaser
Norther California

1937-1948 Stock Ford V-8 Flathead Water

September 08, 2013
These water pumps are a great improvement to the old original design that failed inherently after a period of time. With real bearings and seals over the brass bushing and packing of the OEM version.
Yes, I recommend this product.
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Bill
Verified Purchaser
Cleveland, Ohio

Pump seems fine, gasket damaged in box.

December 12, 2011
Part seems O.K. Gasket was damaged in box (cut by edge of pump housing). Had to buy extra gaskets that I hope are of good quality and do not leak.
Pros:
  • Durable
Yes, I recommend this product.
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Merchant Response:

Speedway Motors Customer Service refunded this customer for the cost of the gaskets that were damaged during shipping.
Page 1 of 1

Product Q&A

4 questions : 4 answers

1 answers

Do these pumps have a .75" or a .63 shaft? The listing says both details.

FlatheadRonbo
PA
December 26, 2014

Do these pumps have a .75" or a .63 shaft? The listing says both details.

Answers

December 26, 2014
EricM
The roller and ball bearings reside on a .63" shaft whereas the seal itself is on a ¾” step up of the shaft. In the blow up of parts in the Water Pump Features PDF you can see the stepped shaft. http://static.speedwaymotors.com/images/charts/Illust-FHWaterpump.gif
1 answers

What pressure cap will these water pumps operate ?

Olds
Nederland, Tx
September 24, 2014

What pressure cap will these water pumps operate ?

Answers

September 24, 2014
EricM
Compared to the original water pumps that basically didn’t run a pressurized system Speedway’s new pumps have better seals and bearings allowing customers to use 7 pound caps and some even use the 15 pound caps. It depends on the radiator you are using and if an OEM you want to use no more than 7. If using a modern aftermarket radiator a 15 to 16 psi cap should be no problem.
1 answers

Are the 49-53 and 37-48 interchageable?

Larry
June 08, 2011

Are the 49-53 and 37-48 interchageable?

Answers

June 09, 2011
Jason
No, pulley allignment is different
1 answers

do these water pumps have ports for a heater hose? having trouble finding the correct lower heater hose adapter

Mark
ohio
June 29, 2016

do these water pumps have ports for a heater hose? having trouble finding the correct lower heater hose adapter

Answers

June 30, 2016
John
Expert
We apologize but pump number 91015593 does not offer the heater hose port but pump number 91015592 does have the 3/8 npt port on both driver and passenger side. Difference is pulley spacing from the block which is 1" on the 93 pump and 2 3/4" on the 92 pump. Be sure and order to mate with your other pulleys.
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