Engine water pump supplier

[gworobec]

Seriously, do you believe that balancing a 4-41/2 inch water pump impeller is going to make a difference in a 455 or 403 CID engine. Give me a break here. You need to get your GMCMH priorities correct.

Gary Worobec

>
> Changing impellers without dynamically balancing the assembly is a good way to create vibration and premature failure. I would not recommend it.
>
> Jon Darcy ACES
> North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny Trans, FiTech FI,Honda 6010
>
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Gary and Joanne Worobec
Anza, CA
1973 Glacier 23

 

[jim miller]

> I'm just getting ready for a engine swap, and I want every thing on the new engine to be 100%.
> That's why I'm being extra careful. I would hate to crack a new engine because of a relitivily inexpensive part.

Hi Scott,
If you are going to have the timing cover off... then I’d suggest that you bolt your chosen water pump up to it and check the alignment between the holes in the cover and the water pump casting. When I rebuilt my engine I found that part of the water pump housing was blocking about 30% of the hole through the cover on the driver’s side…and that was on the same side that had a crack in the head in the #1 cylinder which was the cause of the top-end rebuild in the first place.

I took some pictures of a mock-up in order to help show my findings: http://www.jcmco.com/gallery/album28

—Jim

Jim Miller
1977 Eleganza
1977 Royale
Hamilton, OH

 

[johnny]

Good, Scott. May I suggest as a Tejan you might want to subscribe to my favorite Manly Man's magazine, Truck and Testicle

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon

 

[scott nutter1]

Johnny,
I already have that subscription. In fact I get it twice a month!
Scott
--
Scott Nutter
1978 455 Royale Center Kitchen, Quad bags.
Houston, Texas

 

[advanced concept energy solutions]

Gary I really don't think the pump balance will effect the engine. At the rpm it turns it sure will have an effect on those little bearings in the pump with the rather large fan out there on an overhung shaft. If you don't balance that new pump impeller combination at some harmonic of normal speed your chances of premature bearing failure is very high. With all the work that goes into changing out a pump why not just buy the right one from the right supplier, unless you don't value your time.

Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny Trans, FiTech FI,Honda 6010