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Product Summary

Mechanical Water Pump Type, Short Water Pump Style

  • Completely new water pumps feature severe-duty roller & ball bearings, close tolerances & modular impellers for maximum flow & reduce cavitation
  • Kit includes a Speedway Motors 1937-1948 Flathead Driver Side Water Pump & a Passenger Side Water Pump as well as gaskets
  • These pumps also have modern ceramic seals on a heavy duty 5/8" shaft, making the assembly exceptionally strong & more efficient
  • Forged all-new high-nickel iron casting with a premium black painted designed for use on systems with 5/8" drive belts - 1937-48 Ford & Mercury Flatheads
  • Pulley diameter measures 4.35" with a belt width of .63" & an overall pump height of 9"

Comes as a Kit

Key Specs

BrandSpeedway Motors
Water Pump TypeMechanical
Water Pump StyleShort

Need To Know

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Details

 We got your back with our Speedway Flathead Water Pump Kit! Both water pumps and needed gaskets are included to simplify your Flathead engine build, so you can spend more time and money on other aspects of your project!

Kit Contains:

  • (1) Speedway Motors 1937-1948 Flathead Driver Side Water Pump
  • (1) Speedway Motors 1937-1948 Flathead Passenger Side Water Pump

Speedway Motors 1937-1948 Flathead Water Pumps

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 5/8" shaft, making the assembly exceptionally strong and more efficient. All mounting areas are spot faced for improved fit and sealing.

  • For Wide Belt Pumps
  • 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
  • Pulley diameter: 4.35"
  • Belt Width: 0.63"

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

Water Pump Features 

Charts

Specifications

KEY SPECS
BrandSpeedway Motors
Water Pump TypeMechanical
Water Pump StyleShort
GENERAL
Pulley Type CompatibilityV-Belt
Pulley Diameter4.35"
Groove Count1
Belt Width0.625"
Housing MaterialCast-Iron
Housing FinishPainted
Housing ColorBlack
Mounted Length3.31"
Pilot Shaft Diameter0.63 Inch
Overall Height9.00"
Gasket(s) IncludedYes
Sold in QuantityKit