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Block Casting SN

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Wily-46 View Drop Down
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    Posted: 11 Sep. 2019 at 11:12am
Good Morning,
 
A friend of mine recently purchased a new to him Cj2a.  The plate with the SN of the Jeep on the firewall indicates that it is a '48 however the sn on the casting of the block says GPW-9939.  It is in the oval flat spot on the block.  I am assuming this is an earlier engine than a '48?  Any information is appreciated. 
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mbullism View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbullism Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 11:19am
With some verification it sounds like that block is originally from a GPW (the ford equivalent to the willys MB ww2 jeep)

They are highly sought after by folks doing restos on a GPW... frankly, were it me, since a GPW block isn't the original engine for a '48 anything I'd be looking for another engine for my 2a, and looking to get that block in the hands of someone that "needs" it (and put a little scratch in my pocket LOL )

If he decides to keep and run it, the major difference between what it sounds like and what it should be is the GPW block will have a timing chain and a '48 L134 would have timing gears... there are other differences associated with these...


Edited by mbullism - 11 Sep. 2019 at 11:25am
1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #15849
2016 JK unlimited (Hers)
1969 Kaiser CJ5 (sold)

Analog spoken here....
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athawk11 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 11:50am
Originally posted by mbullism mbullism wrote:


They are highly sought after by folks doing restos on a GPW... frankly, were it me, since a GPW block isn't the original engine for a '48 anything I'd be looking for another engine for my 2a, and looking to get that block in the hands of someone that "needs" it (and put a little scratch in my pocket LOL )

Or...you keep it and drive all the GPW guys crazy with desire.Wink
1- 1946 CJ2A   
2- 1949 CJ3A
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mbullism View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbullism Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 12:04pm
Originally posted by athawk11 athawk11 wrote:

Or...you keep it and drive all the GPW guys crazy with desire.Wink

LOL... or that, sure Wink
1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #15849
2016 JK unlimited (Hers)
1969 Kaiser CJ5 (sold)

Analog spoken here....
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Bruce W View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce W Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 12:22pm
Originally posted by mbullism mbullism wrote:

Originally posted by athawk11 athawk11 wrote:

Or...you keep it and drive all the GPW guys crazy with desire.Wink

LOL... or that, sure Wink

Yeah.....
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You!

We Have Miles to Jeep, Before We Sleep.
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Wily-46 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wily-46 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 12:29pm
I will get try to get a pic of the block casting and post it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 12:37pm
Originally posted by Wily-46 Wily-46 wrote:

I will get try to get a pic of the block casting and post it.

Move forward with this decision cautiously.  You might get inundated with Private Messages that will force you to turn off that website feature.LOL
1- 1946 CJ2A   
2- 1949 CJ3A
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mbullism View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbullism Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 1:52pm
Originally posted by athawk11 athawk11 wrote:

Move forward with this decision cautiously.  You might get inundated with Private Messages that will force you to turn off that website feature.LOL

This advice is spot on LOL...  I once posted about an RMC engine I had found (replacement crate engine for an M38) with factory spec bores and bearings, and while not "inundated" I did get PM's over the next six months from folks wanting it for their motor pool resto.  The GPW block is multiple times more desirable I would think...

.02

(don't give up your buddy's name, lol)
1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #15849
2016 JK unlimited (Hers)
1969 Kaiser CJ5 (sold)

Analog spoken here....
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Wily-46 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wily-46 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep. 2019 at 3:57pm
Got it.  I talked to my buddy regarding this thread, and all of your input.  I believe he plans to build the engine and keep it.  I would add a couple of pics for conversational points if I could figure out how to...


Edited by Wily-46 - 12 Sep. 2019 at 9:26am
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mbullism View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbullism Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 11:35am
The rebuild tag is cool Smile  Tough to see on my monitor, but is that date November 30, 1957?  Post Korea in Japan...  Would be interesting to learn how it made it back to the states Tongue

Others would know better, but I have to believe a GPW ESN that low would have come out of a jeep with an F-script tub... definitely cool


Edited by mbullism - 12 Sep. 2019 at 11:38am
1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #15849
2016 JK unlimited (Hers)
1969 Kaiser CJ5 (sold)

Analog spoken here....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 11:45am
Wow.  That engine is all kinds-a-cool!  That is a really low number.
1- 1946 CJ2A   
2- 1949 CJ3A
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Wily-46 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wily-46 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 11:47am
Yes, it looks like rebuild date is 11/30/57.  I thought it was pretty cool as well. 
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mbullism View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbullism Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 11:56am
From the g503 "oldsite" serial number database... and my understanding that gpw's had matching SN's and ESN's

GPW 9963 DOD 3/27/42
GPW 9964 DOD 3/30/42
GPW 9972 DOD 3/30/42

That's really early...

ETA:  get ready for the PM's LOL

ETAA: just a data point for comparison:



Edited by mbullism - 12 Sep. 2019 at 12:00pm
1946 CJ2A #69750 - "Plowshare"
Bantam T3-C #15849
2016 JK unlimited (Hers)
1969 Kaiser CJ5 (sold)

Analog spoken here....
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JeepSaffer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JeepSaffer Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 3:16pm
Your buddy could buy the 1942 GPW rolling chassis with incorrect engine that is currently for sale on this page, and be halfway towards a really cool resto..... Wink
1948 CJ2A #204853 in South Africa
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Scratch View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Scratch Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 5:41pm
Very cool that it's so early!
'43 GPW 93487 Black
'46 CJ2A 77632 White
'47 CJ2A 141681 Green
'48 CJ2A 156240 Red/Yellow
'48 CJ2A 181341 Red
'61 CJ5 123120 Tan
'76 CJ7 Camo
'03 TJ Inca Gold
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ol' Unreliable Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep. 2019 at 9:11pm
According to All-American Wonder Vol II, page 186, GPW 9921 was delivered on March 30, 1942.  The next number on the list, 10225, was delivered on March 11, 1942.  This one was likely built at a different plant and I would guess that 9939 was part of the group delivered at the end of March.  I would specifically guess that 9939 was delivered on March 30.  That's just a guess though. 
There's a reason it's called Ol' Unreliable
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