Water pumps
Printed From: The CJ2A Page
Category: The CJ2A Parts Project
Forum Name: Cooling System
Forum Description: Includes Radiator, Waterpump, Hoses, Thermostat, etc.
URL: https://www.thecj2apage.com/forums/forum_posts.asp?TID=2778
Printed Date: 19 Apr. 2024 at 11:43pm
Software Version: Web Wiz Forums 12.06 - http://www.webwizforums.com
Topic: Water pumps
Posted By: GaryArf
Subject: Water pumps
Date Posted: 19 Nov. 2006 at 5:28pm
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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
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 The next is one that is more commonly found but still retains the same part # 637052
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 Gary ------------- CJ2A #10021 #34692 #58500 |
Replies:
Posted By: Lomar15
Date Posted: 20 Nov. 2006 at 2:11am
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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 - http://picasaweb.google.com/lomar15CJ2A |
Posted By: sean
Date Posted: 20 Nov. 2006 at 11:57am
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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 ------------- http://www.CJ-2A.com" rel="nofollow - CJ2A Data site http://www.nulltime.com/jeep" rel="nofollow - 2A #16279 |
Posted By: Oakes
Date Posted: 22 Nov. 2006 at 11:21pm
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I think it was tapped for a heater and that's why the same part number. ------------- 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 |
Posted By: GaryArf
Date Posted: 22 Nov. 2006 at 11:46pm
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There was a post by Sean awhile ago that had the heater hose connected to the radiator hose.
http://www.thecj2apage.com/forums/forum_posts.asp?TID=2700 - http://www.thecj2apage.com/forums/forum_posts.asp?TID=2700 ------------- CJ2A #10021 #34692 #58500 |
Posted By: F Bill
Date Posted: 23 Nov. 2006 at 9:46am
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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. ------------- 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!! |
Posted By: sean
Date Posted: 23 Nov. 2006 at 2:18pm
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Confusion reigns again. The same pump part number is used in all 3 Willys parts lists: 639992 However:
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 #170064Since 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 ------------- http://www.CJ-2A.com" rel="nofollow - CJ2A Data site http://www.nulltime.com/jeep" rel="nofollow - 2A #16279 |
Posted By: sean
Date Posted: 23 Nov. 2006 at 10:16pm
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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) http://www.cj-2a.com/pictures/heater_instl.jpg">  Sean ------------- http://www.CJ-2A.com" rel="nofollow - CJ2A Data site http://www.nulltime.com/jeep" rel="nofollow - 2A #16279 |
Posted By: lowenuf
Date Posted: 11 Dec. 2006 at 1:40pm
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#31662 has no hole
#195769 does ------------- 45 #10012 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 |
Posted By: William W
Date Posted: 12 Apr. 2008 at 12:00am
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49' CJ2A 19992 has the hole & plug ------------- 1946 CJ2a #19992 - USAEC "Manhattan Project Vehicle" (Post Bomb) |
Posted By: Navi27013
Date Posted: 01 Feb. 2009 at 4:41am
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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. |
Posted By: mogger7
Date Posted: 02 Feb. 2009 at 12:04am
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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
mogger7 ------------- mogger7 |