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Note: This water pump is for 1949-1953 engines in 1949-1953 pickups or 1932-1948 cars.
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.
Speedway's 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 3/4" shaft, making the assembly exceptionally strong and more efficient.
910-15592 Instructions (PDF)
Used to replace leaking pump. The fit and finish were excellent.
was very well painted
I bought 2 pumps and you only sent one plug for the heater outlet. What happened?? By the way, stainless allen head bolts for the pumps look great, Chuck
After receiving this review, Speedway Customer Service promptly shipped the missing 3/8" NPT plug to this customer at no charge. We take great care to ensure that all orders are complete, however, mistakes can and do happen. If you notice that your order is missing a component, please let us know as soon as possible and we will make sure to get it to you ASAP.
Get your questions answered by the community. Ask or answer questions below.
What is the plug size/thread type for the threaded bleading/drain port on this product.
Asked on 3/16/2011 4:34:37 AM by IronHorse from San Diego
The plug size of this port is 5/8 pipe.
Answered on 3/24/2011 10:00:09 AM by Waymon from Speedway Motors
what size inside [ dia ] hose is needed
Asked on 7/1/2011 8:11:56 AM by IronHorse from San Diego
These Flathead V8 water pumps accept the standard 1 ¾” I.D. hose.
Answered on 7/6/2011 7:15:29 AM by John from Speedway
Q: WHAT PSI RADITOR CAP SHOULD I USE ? WHAT IS THE MAX PSI THAT THE SEAL'S OF THESE WATER PUMP'S CAN HANDEL ! TO AVOID OVER HEATING ? USING STANDARD COOLENT ? OR, 40 BELOW ?
Asked on 7/8/2011 10:48:40 AM by IronHorse from San Diego
Speedway offers two lower pressure radiator caps for use with the flathead engines. If the other cooling components and engine are in good condition you can run the 15 pound caps such as part number 91015602 and if wanting a lower pressure cap we also offer 91015601 at 7 pound. Some other alternates in chrome or brass are available. Using any type of additive can also help keep temperatures under control
Answered on 7/12/2011 5:16:12 AM by John from Speedway
Q: I PLAN, TO BUY THE FOLLOWING PART'S FROM YOU GUY'S!!!! THESE NEW WATER PUMPS, YOUR NEW ["""GRIFFIN RADITOR"""]*-? } YOUR NEW EXPANSAION TANK, YOUR NEW HOSE'S, YOUR NEW THERMOSTAT'S , YOUR NEW THERMOSTAT HOUSING'S, YOUR NEW GASKETS ,FOR MY TOTALY REBUILT FLATHEAD V/8 BORED OVER SIZE 1/8 IN !!!!! WHAT PRESSURE RADIATOR CAP DO YOU!!!!!!!!!!!! RECOMEND!!!!!!!!!!!! TO GO WITH ALL OF THE, ABOVE MENTIONED ,NEW! PART'S ? NO HEATER CORE OR OTHER B.S.!!! WHAT'S THE MAX!! PRESSURE THE SEAL'S OF THESE WATER PUMPS ARE ****GARUNTEED**** TO HANDLE!! AND WHAT CAP PRESSURE DO YOU!!!!!!!!!! THINK IS BEST?????? WITH THE COMBNATION OF ALL OF THESE NEW PART'S? WALKER RADIATOR SAID, 7LBS IS MAX! WHAT IS GRIFFIN'S MAX? I NEED THERE SPEC'S,LB'S, AND WHAT YOU THINK,IS THE MOST REIALBLE WAY TO GO!!! WITH ALL OF THE NEW PART'S I GOING TO ORDER FROM YOU! THANK'S
Asked on 7/14/2011 3:20:00 PM by from
Speedway’s new flathead water pumps are superior to the original and will accept more belt tension without the common leaks incurred with the originals and will also handle higher pressures desired by modern day enthusiasts. To work in conjunction with most radiators and the limitations imposed by the flathead engines we suggest using the 7# radiator caps such as part number 91015601 or 91015603.
Answered on 7/18/2011 4:41:38 AM by John from Speedway
What is the large threaded hole on the side for? My 1952 F1 pickup only has the threaded hole on the right pump, the left pump does not have this threaded hole. Can I plug it?
Asked on 8/8/2011 8:09:24 AM by IronHorse from San Diego
There is definite mount difference between right and left and BOTH have 3/8” NPT threads for heater port. If desired one can be plugged as needed. In the flathead era the heater was an option. Speedway’s new pumps offer the versatility of using either for heater function if desired.
Answered on 8/11/2011 6:59:43 AM by John from Speedway Motors
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