Technical do all 455 olds engine water pumps stick out the same?

Im buying a water pump for my early 70's 455 olds engine..question..is there a shorter water pump as i plan on putting that 455 in my 56 oldsmobile and would like the extra room for a bigger radiator..thanks..i just didnt know if there was certain ones that were shorter

 

My son fitted a 455 in his 55 Olds, used the fan off the 324 and the original radiator and has trouble getting the temperature up to a suitable running temperature. During the winter he has about half the radiator blocked off with a piece of cardboard. And the engine is definitely not standard either so I doubt that you will need a bigger radiator if your existing one is in good condition.

 

http://classicoldsmobile.com/forums/tech-editors-desk/28191-water-pump-lengths.html

 

Look at a 65 Olds 88 this is a full size with a 425 engine, I believe the WP's are the same but shorter. I own one it has no air.

Pat

 

I


i live in the desert southwest..im more worried about heat than the cold

 

There's a difference in length......difference comes in whether or not the original was an A/C equipped engine or not. I think there's about 5/8 difference in overall length from gasket mounting surface to block, to the face of the fan hub. I seem to recall the crank pulley and the water pump pulley have a difference in offset also........

 

As far as I know the only difference is the impeller, I don't recall any difference in length, I may be wrong, but thought pulleys were the same between A/C and non A/C engines

 

Cobalt, don't know if this will help or not. In the early '70"s I put a '67 Pontiac OHC 6
in a '37 Chev cp., when it was time to reinstall the front end sheet metal,I found I needed
about 2.5 " more space for the fan and water pump shaft clearance. I was able to swap the
mounts on the radiator , side to side and gained about 2" , but still needed another inch or so.
I looked at the water pump shaft, which had about 2.5" of bare shaft beyond the cast housing
so I found a flat pulley and pushed the pulley flange back 1.50" then cut off the excess.
In the end I had .75" clearance on the fan to radiator and it was perfect .
Now if you have extra space on the pump shaft you may consider the same solution .

.................................. Jack

 

Olds had three different length water pumps of all of the modern designs. 260 through the 455 engines.