Water pump choice

R

Ratchet

Apprentice
Jan 10, 2018
65
8
What water pump should I use on my L-31 350 SBC with an aluminum radiator and dual electric fans? If you suggest a belt driven conventional fan - long or short? If electric - I'd like to keep the cost reasonable.
The car will be street driven.
 
MC96

MC96

Master Mechanic
Dec 7, 2015
400
63
Well, if its an L31 it came with a long, reverse rotation, water pump
 
xylorex

xylorex

Greasemonkey
Aug 2, 2018
118
28
New Orleans, LA
I'm running Edelbrock water pumps (non electric) on my two small block Chevy's, I like them.

I've got the oem serpentine belt setup so, reverse rotation also.
 
R

Ratchet

Apprentice
Jan 10, 2018
65
8
I'm running Edelbrock water pumps (non electric) on my two small block Chevy's, I like them.

I've got the oem serpentine belt setup so, reverse rotation also.
Ok, I've read a few confusing things about water pump bypass and Vortec heads.
So, this is what I have read (below) and I need help with clearing up some water pump/cooling issues:

taken from: TriFive.cc
"SPECIAL NOTE: This intake manifold is primarily intended for use with Vortec heads on pre-Vortec blocks. Standard engine blocks route thermostat bypass water from the block directly to the water pump through the passenger side
water pump mounting flange. If the manifold is used on a 1996 and later Vortec engine that does not have the in-block bypass passage, you must route a thermostat bypass hose from the water bypass port on the front of
the manifold to the 5/8” hose nipple on the passenger side of the Vortec water pump. Use a 3/8” pipe to 5/8” hose nipple fitting, and a 7” length of 5/8” hose to accomplish this.
If your engine block has the thermostat bypass
passage, use the 3/8” NPT plug supplied in the kit to plug the bypass port in the front of the intake manifold.
It looks like the bypass issue affects the '96 and up Vortec blocks."

My motor is a 96 L31 Vortec. I'm using a Jegs carb intake, Part Number: 555-513002, with a Holley carb.
Do you have any suggestions on a water pump?
 
TURNA

TURNA

Geezer
Jul 24, 2009
9,070
113
Socialist NY
I would say avoid an Edelbrock

BUT I can only speak of their big block pumps

The lower hose outlet is the wrong size and the bypass hose is in the wrong location.


If you choose an Edelbrock take a good look at it and make sure things are where they supposed to be.
 
R

Ratchet

Apprentice
Jan 10, 2018
65
8
I have order a water pump from my parts supplier. I really do not think there is much issue in going with a conventional pump.
 

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