Packard Forum Index » Post-War (1946-54)

HH56 wrote:
I don't know the exact details on a six pump but I too was surprised a new repro pump was available for the 356 engine.

I asked the Packard guys at Kanter about this since the 356 was not in the scheme of things, a large production engine. If I remember correctly the answer was the water pump bodies themselves were essentially identical on all the common or mass produced inline engines from the mid 30s thru the 50 models. Not sure if that statement holds for the pre 1940 senior super eight engines though.

Anyway, the reason they were available for low volume engines was the only significant difference between pumps had to do with the size of the fan hub and the distance it was pressed onto the shaft. A single common repro pump could thus be used by only pressing on the correct size hub and setting it the proper distance for the particular year and engine.

HH56 wrote:
...I am wondering if the shaft length might be another difference that was a compromise to get one assy. The new shaft looks a bit shorter in that photo and it would appear that to get the 1/2" behind the hub it might be recessed into the hub a slight bit in the front.