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235 water pump
#1368085 Tue Jul 07 2020 04:36 AM
Joined: Mar 2010
Posts: 124
Shop Shark
I have a 1957 Chevy car 235 engine in my 52 Chevy truck,
Have noticed a small puddle of water under front of truck after start up
Today stared the truck And again a small puddle but was able to see a small stream of water running down the front of the block it looked like the water was coming from the bottom of the water pump.water was moving in the radiator as it should no strange sounds coming from the pump next chance I get I will check for any loose bolts .
Any recommendations where to buy a new short shaft water pump for a 235?
Also anyone know if the belt pulley is pressed on.

Last edited by latroca52; Tue Jul 07 2020 04:39 AM.
Re: 235 water pump
latroca52 #1368090 Tue Jul 07 2020 12:06 PM
Joined: Jan 2017
Posts: 393
Shop Shark
I got my at my local NAPA--their part 58-126, or call Joe Mendola 520 235 2659. My 51 has a 1954 235, had to replace 2 years ago--Good Luck Bill

Re: 235 water pump
latroca52 #1368115 Tue Jul 07 2020 03:19 PM
Joined: Dec 2017
Posts: 771
Shop Shark
Could be just a gasket gone south. You are going to have to tear it down no matter what but any chance you have room to remove the belt, fan and pulley with the radiator and hoses in place? Pulley is not pressed on. If you can, and if you can get access to a cooling system pressure tester (the kind that you pump pressure in the system), you could put a little pressure in the system and see where the leak is coming from. If out of the bearing and front seal, time to replace the pump. If from the gasket, then maybe just a 2 dollar gasket. Might also be a leak from the thermostat housing. There are two gaskets. The oblong gasket for the lower housing to the head, and then the actual T-state gasket. They could also be leaking and trickling down around the water pump.

Rock Auto has pumps.

Re: 235 water pump
latroca52 #1368135 Tue Jul 07 2020 05:55 PM
Joined: Feb 2004
Posts: 20,618
There's a weep hole in the pump casting behind the pulley flange. If coolant is trickling out of that hole the shaft seal has failed. The only fix is a replacement pump, as the shaft, both bearings, and the mechanical seal is a one-piece assembly that most pump rebuilders hoard like the gold of the Sierra Madre. "Short shaft" pumps are a custom made item, made by using a hydraulic press to push the fan/pulley mounting flange back on the shaft, and cutting the end of the shaft off to keep it from hitting the radiator. I believe some of the resto-ripoff places sell modified pumps at an outrageous price if you're not able to modify one yourself.

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Re: 235 water pump
49 3100 #1368266 Wed Jul 08 2020 10:03 PM
Joined: Mar 2010
Posts: 124
Shop Shark
Thanks for NAPA part
Number my local NAPA store has the water pump in stock

Re: 235 water pump
latroca52 #1368267 Wed Jul 08 2020 10:04 PM
Joined: Mar 2010
Posts: 124
Shop Shark
Thanks to all of replies and info it’s always greatly appreciated.

Moderated by  Woogeroo 

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