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Stewart Components 13113 Small Block Chevy Stage 1 Water Pump, Long


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Shaft Diameter:
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Heater Inlet Size:
1/2" NPT
MFG. Part #:
Clearance from back of pump to engine block mount is 1.38"

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What's in the Box

Uses new, OEM cast iron castings machined and assembled by Stewart Components to their exacting standards. They feature higher flow and pressure for better cooling. They have a 3/4" bearing and 5/8" shaft. Precision ground hub for perfect pully alignment, equal flow to left and right cylinder heads. Precision impeller installed to exacting tolerances. 

Includes gaskets. One year warranty.

Learn how to choose the correct water pump for your application by reading our tech article.  SBC - Short vs Long Water Pump.   

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Lightweight aluminum long style pump for S/B Chevy. Has provisions for your power steering mount.

NOTE: This pump is designed for street use and is not to be run on a motor which exceeds 5,500 RPM.

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Learn how to choose the correct water pump for your application by reading our tech article.  SBC - Short vs Long Water Pump.   

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For Small Block Chevy V8s with '69-'86 long style water pumps with 5/8" shaft.

Note: The lower crank pulleys in our combo kits are manufactured thicker than normal stock pulleys.  This requires longer 3/8" bolts to be purchased separately.  Allen head type bolts recommended.

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

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Red Line 80204 Water Wetter Coolant Additive

Red Line Water Wetter Super Coolant additive is a unique wetting agent which reduces coolant temperatures by as much as 20° F. This is a liquid coolant treatment product which is designed to be added to solutions of antifreeze and water to help improve the heat transfer properties of glycol-based antifreeze. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze. Improves the ability of coolant to wet heat transfer surfaces by 50%.

  • Reduces or eliminates bubbles that form on hot metal surfaces to reduce coolant temperatures by up to 20°
  • Superior heat transfer properties compared to glycol-based antifreeze
  • Compatible with new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems
  • Improves heat transfer and reduces cylinder head temperature
  • Designed for use with all modern aluminum, cast iron, copper, brass and bronze cooling systems
  • Cleans and lubricates water pump seals
  • Reduces cavitation and complexes with hard water to reduce scaling
  • Does not lower cooling system below the thermostatically-controlled temperature
  • 12 fl. oz. bottle treats 12-20 quarts

Water Wetter Tech Info (PDF)

Learn more about how cooling systems work with proper coolant mixture and additives by reading our tech article. Cooling System Principles.   

Book - The Official Guide to Cooling Systems

Learn the secrets of how a cooling system works so you can solve your own cooling system problems. This book was written by a man who has 20-plus years preparing pre-1948 cars for the 4,000-mile Great Race across the United States. Great info for all, but geared toward the Flathead Ford V8.

By Randy Rundle. 8.5" x 11", 36 pages.