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GaryArf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GaryArf Quote  Post ReplyReply Direct Link To This Post Topic: Water pumps
    Posted: 19 Nov. 2006 at 12:28pm
I have two different water pumps. In the parts list both '45 and '49 the same part # is used  637052.... On the diagramn in the '45 book it shows no pipe plug in the boss on top of the waterpump body. This one is on Jeep #34692
 
 
The next is one that is more commonly found but still retains the same part # 637052
 
 
Gary
CJ2A #10021 #34692 #58500



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Lomar15 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lomar15 Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov. 2006 at 9:11pm
No pics but mine has no plug CJ2A 48777
Bob
46 CJ2A #48777
42 MB Slat Grill 119898 Frame
51 M38 Body
42 MB #155950
Spen Trailer

http://picasaweb.google.com/lomar15CJ2A
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sean View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov. 2006 at 6:57am
Gary:

I've noticed the difference in pumps too.  Have no answer, except maybe it was "however the manufacturer delivered them".

#16279 has the pipe plug.

Sean
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Oakes Quote  Post ReplyReply Direct Link To This Post Posted: 22 Nov. 2006 at 6:21pm
I think it was tapped for a heater and that's why the same part number.

Edited by Oakes - 22 Nov. 2006 at 6:21pm
SOME PEOPLE ARE LIKE SLINKIES, THEY ARE NOT REALLY GOOD FOR ANYTHING BUT THEY STILL BRING A SMILE TO YOUR FACE WHEN YOU PUSH THEM DOWN A FLIGHT OF STAIRS
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GaryArf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GaryArf Quote  Post ReplyReply Direct Link To This Post Posted: 22 Nov. 2006 at 6:46pm
There was a post by Sean awhile ago that had the heater hose connected to the radiator hose.
 
CJ2A #10021 #34692 #58500



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F Bill View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote F Bill Quote  Post ReplyReply Direct Link To This Post Posted: 23 Nov. 2006 at 4:46am
Water pumps get replaced.. Perhaps some of these variants are aftermarket munufactured...
 
It is really really hard to determine what has been on the jeep since the factory...a 20 year old water pump can be just as grungy as the original 60 year old one. Also a rebuilt pump may have originally been on any flathead. jeep motor from WWII on up.
 
Do the pumps exhibit a casting number or part number anywhere? Mine don't seem to...and they are all loose from engines as well.
 
I guess we need to see factory photos on this one to determine correctness of plug or none??
 
FWIW, the MB/ GPW guys seem to think no plug is WWII, Plug is CJ. It would make sense that the '45 book would show a WWII leftover part.


Edited by F Bill - 23 Nov. 2006 at 4:48am
If you haven't checked out the tech FAQ section, go to:
http://www.thecj2apage.com/forums/tech-faq_forum57.html
for a lot of great stuff you need to know!!

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sean View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Posted: 23 Nov. 2006 at 9:18am
Confusion reigns again.

The same pump part number is used in all 3 Willys parts lists:  639992

However:
  • the '45 list does NOT show a pipe plug for that location.
  • the '47 and '49 lists DO show a pipe plug, for heater return fitting.
but ...
the '47 list STILL shows a metal radiator tube w/fitting for heater return as well.
but then ...
the '49 list shows 1-piece all-rubber hoses for after #170064
Since the Harrison heater was on the wrong side of the tub to tap into the lower radiator hose, I'd guess that the tapped fitting in the water pump was phased into production in anticipation of the change in heater location.  The change from metal tube to rubber hose for similar reason: the metal tube was no longer necessary.

Sean
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Posted: 23 Nov. 2006 at 5:16pm
Now to REALLY confuse the issue.

The MB heater ("Winterization kit") was plumbed into the water pump!

Beats me why they would have changed it to the lower rad. tube.

(click for full-size, 1008 x 1376, image)

        

Sean
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lowenuf Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec. 2006 at 8:40am
#31662 has no hole
 
#195769 does
45 #10033 ACM #47
45 #10163 ACM #188
57 CJ5    Dauntless V6, T-18 4-speed, D-44 rear/D-30 front, D-20 twin stick



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Post Options Post Options   Thanks (0) Thanks(0)   Quote William W Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr. 2008 at 7:00pm
49' CJ2A 19992 has the hole & plug
1946 CJ2a #19992 - USAEC "Manhattan Project Vehicle" (Post Bomb)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Navi27013 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan. 2009 at 11:41pm
Check Service Bulletin #787 it states this change that took place in 46 
 
Water Pump - The water pump body on the Model CJ-2A is now drilled and tapped

for the installation of a water heater, eliminating the neccesity of this

operation being done after the vehicle is built. A 3/8" plug is easily removed

when a heater installation is required.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote mogger7 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Feb. 2009 at 7:04pm
51-52 m38 has a short 90 dagree bent hose comming off the waterpump where plug is and goes to the front of the head
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