The truck water pump should have a larger shaft than a car water pump also.
marv

The truck and car pumps use different offset pulleys to keep things linedd up dont they 1


  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Turns out there is a difference between truck and car water pumps. Oh well, live and learn.
Anybody wanna reman car w/pump?

I would quess that you are trying to put this on a car motor? Use the truck water pump and generator pulleys and they will match up.


312T85Bird

What?

I still have the single damper I got with the core engine. I also somehow got an extra seal for it. So when I pushed it onto the spare damper, it stopped on a ridge about 3/8" from the tapered part where the pulley itself mates up. My calibrated eyeballs tell me I'm awful close to that on the engine. Close enough I shouldn't have an oil leak.
Also I know short water pump dual pulleys from a Chebbie will work and shims are easy to get thru Summit. Naturally this means grabbing a tape measure and going to the local Pull and Save (damn the bad luck!!).

And put any pressures on the hub and the shaft end(s) only when moving a hub. The bearing is not designed for axial loading.

Thats something that I never think about when everything lines up except the water pump pulley. As stated the flange for the pulley is pressed on without a stop so it can be moved in or out depending on what you need. Just watch for fan to crank pulley clearence and radiator. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I'm thinking that you could pull the hub out to where things line up. I made a puller just for water pump hubs from a steel disk and some grade 8 bolts.

don't know if this is any help but i've been looking in my shop manual for 56 truck and this refers to 272 engine
re positioning of hub on water pump shaft
measurements from pump face (the face that sits on the timing cover) to the front face of the hub
4.72" for light duty engine
4.48" for heavy duty engine
a 1/4" spacer may well do providing there is enough shaft to locate the pressed steel water pump pulley
the question that springs to mind is why are the measurements diferent
stuey

OK, I looked at my '55 F500. It has a 239 with high-mount fan. The "spacer" actually goes between the pulley and the cap screws/lock washers. So, it would not act as a spacer. It would serve to help minimize stresses on the mounting face of the pulley. Hmmm. Does anybody else have a suggestion?