The problem with that reference is a huge lack of consistency. That might
have been the original intent, BUT "stuff happens". I purchased 5 different
pumps, all from different vendors, and they all had the same part number on
the box. "Changes to", seems to be the name of the game. Buyer beware makes
more sense.
Jim Hupy
Salem, Or
> Garry,
> Tom Prior mentioned the following in a previous message on waterpumps.
> Don’t know if it is of any help.
>
> “make sure the part number on the
> bearing is a WR (roller).................not a WB (ball)”
>
> Les Burt
> Montreal
> '75 Eleganza 26'
>
>
> >
> > Difficult to see the difference unless you have one in hand to compare.
> The
> > castings are all very similar, but the impeller shaft, seal, bearing pack
> > and impeller are different. Some of the gasket surfaces are slightly
> > different enough so that a different shaped gasket is used, too. The
> > outside diameter of the ball bearing, and the roller bearing, are the
> same,
> > so that they can be pressed into the same sized bore in the casting.
> > Impellers are different sized as well. Some fill the pump cavity, and
> some
> > do not. Some have a flat back that comes very close to the engine timing
> > cover, and some are just the vanes of the pump. There must be flow rate
> > differences, I suspect that some are for standard duty, some air
> > conditioning, station wagon, agricultural and motor home use.
> Information
> > on their applications is seldom mentioned.
> > There used to be rebuilders around for water pumps, and rebuild kits
> > as well, but they are all obsolete now. My best suggestion for
> replacements
> > on the Cadillac would be to try to find a rebuilder through Hemmings
> Motor
> > News. Just what I would try first. Then it might be the company that used
> > to be called Cadco. I do have pictures, but, I have a new Samsung 8
> phone,
> > and still have some learning to do with the camera. Might have to go back
> > to the store for a lesson or two.
> > Jim Hupy
> > Salem, Or
> >
> >
> > Jim,
> > I buy my Cad water pumps off the Cadillac vendors to insure that I get
> the
> > iron 4.25" impellor.
> > I've never had a pump failure, but I don't have any idea what bearing I
> > have. Pardon my
> > ignorance, but how do you tell the difference? Help all us dummies out,
> > please.
> >
> > Gary Kosier
> > 77PB w/500Cad
> > Newark, Ohio
> >
> > --------------------------------------------------
> > From: "James Hupy"
> > Sent: Monday, April 23, 2018 11:49 AM
> > To:
> > Subject: Re: [GMCnet] 4 to 8 weeks to exchange the wrong CARDONE water
> pump
> > ordered on line.
> >
> >
> >> Bob, when I was gathering sample water pumps for a technical
> presentation
> >> I
> >> was doing at a rally, I ordered 5 pumps from 5 different vendors,
> >> specifiying the heavy duty version. Only got ONE correct one. Guess who?
> >> Applied!. Used the same part number for all of them. All the boxes that
> >> they came in had the same part number on the outside. SUCH IS THE SAD
> >> STATE
> >> OF AFTERMARKET PARTS TODAY. I am sure if you or I ordered fuel pumps, or
> >> alternators, or carbs, that the exact same thing would happen. That is
> why
> >> I have a local rebuilder do my starters and alternators for me. I won't
> >> even start on fan clutches. What a P.I.T.A.
> >> Jim Hupy
> >> Salem, Or
> >> 78 GMC ROYALE 403
> >>
> >>> On Mon, Apr 23, 2018, 8:30 AM Bob Dunahugh
> >>>
> >>> Linda knew that I needed another engine water pump for the other GMC we
> >>> have. ( It's another, not broke. But I'm fixing it anyway thing.) So
> >>> while
> >>> in Tucson. She ordered a CARDONE 55-21118H pump on line. They sent the
> >>> wrong pump. A 55-21118. Now I need to wait the 4 to 8 weeks. And on top
> >>> of
> >>> that. This upcoming pump will cost me more than if I had ordered both
> >>> pumps
> >>> from Jim K at Applied to start with. I have met the enemy. And he is
> me.
> >>> Bob Dunahugh
> >>> _______________________________________________
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