The short water pump on my Chevy 350 got so noisy I couldn't stand it. So . . . I replaced it. The one I used in my build was a Weiand aluminum one, and the replacement is a Flow-cooler cast iron unit. The job was straightforward, with one annoying exception., the bolts (4) required were different lengths! Well, OK, one was the same, but you'd think a SB Chevy short water pump would be so standardized by now that all after market suppliers would use the same specs. Not so; 2 of the 4 bolts were too short, and one was too long! The new pump works perfectly (and quietly!) so I shouldn't complain, but . . . just a little annoyance. I wonder if the difference is related to the aluminum vs cast iron pump? Anybody else encounter this problem?


