Info needed: M38A1 CDN3 water pump

[chris vickery]

Had a small mishap in the garage today, needless to say I’m out one water pump. I suspected it was getting ready to fail anyhow and questioned myself whether or not If go with it or replace it. Well now, no choice.
I have the three groove pulley.
Only need a pump.
Can anyone tell me whether OEM or aftermarket pumps will work, can I simply swap the pulley or is there a wide variation of shaft lengths and diameters?
Alternatively, anyone have a NOS Cdn3 pump?
Thanks Chris

[rob love]

To the best of my recollection the 3 pulley pump were the same pump as the earlier M38A1s, just the pulley was different. There was a modification on the early ones to put the bypass hose nipple onto them...can't remember if that was for the civilian pumps or the military.



I say they were the same because at one point the military bought a bunch of 2 pulley pumps and our BML machine shop in Winnipeg was tasked with making the 3 groove pulleys to replace the two groove.



I do have a NOS CDN2/CDN3 pump sitting on the shelf, but it isn't going anywhere.

[Wayne Hingley]

Chris: l purchased one at Napa about 5 years ago, and swapped out the pulley. I recorded part Napa part number PH505 in my notes, but it looks like WPK43004 or WPN 58454 might be what you need.

[chris vickery]

Thanks Wayne and Rob, I’ll look into it.
Can’t believe I messed up my pump, a little too zealous with the press and then a drop onto the concrete floor causing need for a new unit.

[m38_cdn]

Hi Chris, is this the pump u are looking for ?