'38 Waterpump Question

Posted by Ozstatman On 2007/11/4 18:45:38

Yesterday, Sunday 4th, I replaced the leaking waterpump in my '38 with a rebuilt one. See Canberra Swap Meet post from last week for the story. Now although the car is a '38 I believe the engine is a '37 which went into the car in WW2 @ Darwin when the '38 blew it's original motor on the mail run it did every 2 weeks from South to North of the country and back. Saying that I was also told that the waterpump was a '38 because these were bigger?(and better than the '37?). Anyway there was a leak detected in the waterpump back in May and at that time a bloke in the Packard Club here rebuilt one for me. And in which he installed a Mazda bearing/seal in place of the packard bearing. The Mazda bearing/seal is fully sealed as I understand it.

But moving away from the above - there is a picture below of the 2 waterpumps with the old faulty one - left, and the rebuilt one - right. What I'd like to know is: Why does the one on the right have an oil cap, to lubricate the bearing I presume? While the one on the left from what I can see has a Slot and Clip arrangement? Does the Slot and clip serve the same function? And how often do you lubricate the bearing? With Soluble oil?

I'm asking this because I'm just curious as I don't believe with the setup I now have that I'll need to specifically do this now.

PS - Couldn't get pic to load so see the link below to web album pics of the very exciting waterpump changeover!http://picasaweb.google.com/ozstatman/ChangeoverOfWaterpumpsON38PackardEight1stNov4thNov