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Engine serial number

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buzzshipman View Drop Down
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    Posted: 24 May 2020 at 2:11pm
I have a block that is all apart at my house that I would like to find out about when it is from. The serial number 3J155075. Just curious about when that block would have been in a Jeep.
1946 CJ2A column shift
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1947 Empire Model 90
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otto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote otto Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2020 at 2:37pm
I had J176350 in my 48, was the original engine. 
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Mark W. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark W. Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2020 at 2:41pm
Your serial #3J- 155075, is a late 50s, DJ-3A engine

My engine is #3J 157012 and the DJ guys have told me it is a 58 or early 59 engine The last version of the 134L which was made up until 1971 used in industrial applications.

Your number being a little lower would be 57-58 depending on DJ production numbers in 58.
Chug A Lug
1948 2A Body Customized
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Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962
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jezebeljeep View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jezebeljeep Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2020 at 4:09pm
I am new to the CJ world - trying to decipher what I have. I've looked through the data, and am wondering if my motor is original to the vehicle? Can anyone point me in the right direction?

1947 Jeep CJ2A serial number 106573 (the body and frame numbers match)

The engine has this stamp: 641087 - L -W4 and then AN1-CR-N2
Katelijne van Drongelen
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Joe DeYoung View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joe DeYoung Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2020 at 4:16pm

The 641087 you list is the blocks casting number which is correct for your jeep. The engine serial number should be located between the front of the cylinder head and the rear of the water pump. In some cases the number did get stamped on an oval raised pad on the upper right front side of the block... behind the oil filter canister... if you have one.  

BTW - this is kind of pirating someone else's thread. Would be best to post on your own thread.


Edited by Joe DeYoung - 09 Sep. 2020 at 4:18pm
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to many jeeps, parts, and accessories to list here, but apparently enough to keep me in trouble with my wife.





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SE Kansas 46 CJ-2A View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SE Kansas 46 CJ-2A Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2020 at 4:19pm
641087 - L -W4 and then AN1-CR-N2 is a casting number on the block and is not the stamped serial number of the engine. The original serial number if it is still there would be on a boss just above the water pump. It might not be there if the engine had been overhauled and the block was "decked" to true up any imperfections on the top of the block during the overhaul.

By the way; welcome to the Forum. Ask questions. Read. Enjoy. Contribute. We like pictures of your jeep.
46 CJ-2A #64462 "Ol' Red"

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SE Kansas 46 CJ-2A View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SE Kansas 46 CJ-2A Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2020 at 4:21pm
Joe, you beat me by about 30 seconds.

Good advice about starting your own thread though.
46 CJ-2A #64462 "Ol' Red"

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Post Options Post Options   Thanks (0) Thanks(0)   Quote jezebeljeep Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep. 2020 at 4:58pm
got it - thanks all! i thought these were organized by category - my bad!!
Katelijne van Drongelen
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