356 Water Pump Hub Height
Posted by JD in KC On 2020/8/17 15:26:33
In July of 2011 I purchased a water pump for a Packard 356 engine. I purchased it as something I might need in the future (I have 3 Packards with 356 engines and I figured I would need to replace a pump sooner or later). It's now later and I pulled the pump from my '50 Custom and was about to install the new pump when I noticed that the pulley couldn't possibly clear the pump. I assumed I had been sent the wrong pump from the vendor but based on a recent post from HH56 I think all I have to do is take the pump to a machine shop and have the hub pressed out to match the height of the old pump.
Quote:
The photo shows the pump from the '50 on the left and the replacement pump on the right. There's quite a difference in hub height. Am I correct in thinking that I can have the hub 'raised' to match the old pump and then should be good to go?
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Quote:
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.
The photo shows the pump from the '50 on the left and the replacement pump on the right. There's quite a difference in hub height. Am I correct in thinking that I can have the hub 'raised' to match the old pump and then should be good to go?
Attach file:
(77.67 KB)
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