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Stewart Components 12103 Small Block Chevy Stage 1 Water Pump, Short

Specs
Sold in Quantity:
Each
Finish:
Natural
Material Type:
Cast Iron
Water Pump Style:
Short
Water Pump Type:
Mechanical
Heater Inlet Size:
3/4" NPT on the top and 1/2" NPT
MFG. Part #:
12103
Gasket(s) Included:
Yes
Hardware Included:
No
Shaft Diameter:
0.63
Mounted Length:
6.13
Shaft Length:
0.54
Hose ID:
1.81
Weight:
10.30
Notes
Clearance from back of pump to engine block mount is .88"
Stewart Components 12103 Small Block Chevy Stage 1 Water Pump, Short

Click image to enlarge

Details

Reviews (4)

Q & A (3)

What's in the Box

Info

Uses new, OEM cast iron castings precision 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. 

  • Castings are internally modified for performance and reliability 
  • Compatible with stock lines and brackets
  • Precision ground hub for perfect pully alignment
  • Equal flow to left and right cylinder heads 
  • Recommended for stock, OEM, or mild performance applications 
  • One year warranty

Note: If using a mechanical fan, we suggest using a 3/4" shaft water pump.

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

Customer Reviews

Rated 4.8 out of 5 by 4 reviewers.
RATING BREAKDOWN
4 reviews
5 Stars
3
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Travis
Verified Purchaser
Verified Reviewer
Austin, TX

Stewart water pump

May 09, 2016
Cast iron pump. Used to meet IMCA rules.
Yes, I recommend this product.
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Was this review helpful? 0 0

raceer
Verified Purchaser
Verified Reviewer
southern Il

nice

June 25, 2015
didnt use this but returned and got my refund very quickly Thanks Speedway Motors!!
Yes, I recommend this product.
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Was this review helpful? 0 0

Opa
Verified Purchaser
Sugarland TX

Nice product

February 01, 2012
Was able to install on my ZZ383 with just a little grinding of one timing cover bolt.
Pros:
  • Durable
  • Easy To Install
Yes, I recommend this product.
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Was this review helpful? 0 0

Crash
Verified Purchaser
Olivia TX

Pump up the water

September 20, 2010
Used this on several short engine bay rods, really helpt when space is at a premium.
Pros:
  • Perfect Fit
Yes, I recommend this product.
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Was this review helpful? 0 0

Page 1 of 1

Product Q&A

3 questions : 3 answers

1 answers

Will this pump work on a 89 350?

rule
Council Bluffs, IA, USA
November 10, 2012

Will this pump work on a 89 350?

Answers

November 12, 2012
Jason
This is a short water pump and will not line up with OEM pulley configuration on a 1989 small block
1 answers

Good mourning Will this pump fit a GM 12530283 L31 5.7L block ? Thank you

AL
Boylston , MA
August 01, 2011

Good mourning Will this pump fit a GM 12530283 L31 5.7L block ? Thank you

Answers

August 02, 2011
John
This pump will fit the standard small block Chevy motors including the 305, 350, and 400 which equates to 5.0, 5.7, and larger liter size of the 400. Designed for common rotation and V-belt drive it will work with the serpentine drive system utilizing standard rotation.
1 answers

What size pipe plugs can I use on this pump.

July 14, 2011

What size pipe plugs can I use on this pump.

Answers

July 15, 2011
Jason
The plug on top of pump is 3/4" NPT and on side is 1/2" NPT
Page 1 of 1

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