Block Casting SN |
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Wily-46
Member Joined: 15 Apr. 2015 Location: Missouri Status: Offline Points: 160 |
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Posted: 11 Sep. 2019 at 4:12pm |
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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
Member Sponsor Member x 4 Joined: 29 May 2015 Location: MA Status: Offline Points: 4760 |
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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 ) 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 4:25pm |
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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Or...you keep it and drive all the GPW guys crazy with desire.
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1- 1946 CJ2A
2- 1949 CJ3A |
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mbullism
Member Sponsor Member x 4 Joined: 29 May 2015 Location: MA Status: Offline Points: 4760 |
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... or that, sure
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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Bruce W
Member Joined: 29 July 2005 Location: Northeast Colorado Status: Online Points: 9611 |
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Yeah.....
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It is NOT a Jeep Willys! It is a Willys jeep.
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
Member Joined: 15 Apr. 2015 Location: Missouri Status: Offline Points: 160 |
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I will get try to get a pic of the block casting and post it.
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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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Move forward with this decision cautiously. You might get inundated with Private Messages that will force you to turn off that website feature.
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1- 1946 CJ2A
2- 1949 CJ3A |
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mbullism
Member Sponsor Member x 4 Joined: 29 May 2015 Location: MA Status: Offline Points: 4760 |
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This advice is spot on ... 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)
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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Wily-46
Member Joined: 15 Apr. 2015 Location: Missouri Status: Offline Points: 160 |
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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 2:26pm |
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mbullism
Member Sponsor Member x 4 Joined: 29 May 2015 Location: MA Status: Offline Points: 4760 |
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The rebuild tag is cool 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
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 4:38pm |
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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Wow. That engine is all kinds-a-cool! That is a really low number.
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1- 1946 CJ2A
2- 1949 CJ3A |
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Wily-46
Member Joined: 15 Apr. 2015 Location: Missouri Status: Offline Points: 160 |
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Yes, it looks like rebuild date is 11/30/57. I thought it was pretty cool as well.
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mbullism
Member Sponsor Member x 4 Joined: 29 May 2015 Location: MA Status: Offline Points: 4760 |
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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 ETAA: just a data point for comparison: Edited by mbullism - 12 Sep. 2019 at 5:00pm |
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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JeepSaffer
Member Joined: 26 Sep. 2014 Location: South Africa Status: Offline Points: 1181 |
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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.....
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1948 CJ2A #204853 in South Africa
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Scratch
Member Joined: 30 July 2019 Location: Hudson, WI Status: Offline Points: 1440 |
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Very cool that it's so early!
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43 GPW 93487 Blk
44 GPW 230283 OD 46 CJ2A 50100 Tan 46 CJ2A 77632 Wht 47 CJ2A 141681 Grn 48 CJ2A 156240 Red/Yel 48 CJ2A "Lefty" 181341 Red 61 CJ5 123120 Tan 03 TJ Inca Gld |
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Ol' Unreliable
Member Joined: 25 Sep. 2016 Location: CO Springs CO Status: Offline Points: 4226 |
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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.
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There's a reason it's called Ol' Unreliable
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