Non CJ engine identification |
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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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A little update: the motor is definitely NOT a CJ motor; the block is missing the throttle linkage studs on the back. I searched through pictures of intake manifolds, I found that matches a DJ-3a so I think that that is the engine which is in the jeep now.
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7892 |
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I have a 58-59 DJ-3A engine in my jeep. They are the last version of the 134L.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified 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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Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3590 |
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The 804380 casting number on the block was created for the M38 (MC) in 1950.
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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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What does your throttle linkage look like? Is there a stud on the block which allows the linkage to pivot?
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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what's strange is that it doesn't have the throttle linkage studs on the back of the block, I think that the M38 had that. I actually sourced a complete CJ-2a motor locally that I think I may just rebuild so that it solves a lot of the head scratching/correct part ordering
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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after more digging, I think that I may have solved another aspect of the mystery...
the throttle linkage came from a DJ-3A: here is an article about the DJ-3a throttle linkage: http://www.ewillys.com/2017/06/12/dj-3a-gas-pedal-linkage/ pic of linkage at block: Link of a DJ-3a manifold (641095) http://https://www.willysjeepparts.com/Manifolds.htm picture of the manifold: |
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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rocnroll
Member Sponsor Member Joined: 20 July 2005 Location: Tuscumbia, AL Status: Offline Points: 13548 |
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Correct. |
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'47 CJ2A PU
'48 CJ2A Lefty "Common sense is not that common" |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7892 |
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The block will most likely have the holes for the throttle plate on the back of the block MY 58-59 DJ-3A block does. And it had the CJ throttle pivot attached to it when it was in dads version of CHUG. I modified the Pivot to improve it but its still bolted in the same place.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified 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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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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I put an inspection mirror in the back and found dimples where to CJ throttle plate would bolt, of course I was working with about 1" of room between the block and the firewall so I couldn't see if I would need to drill them out/tap them. I have a bead on a proper CJ motor. Think I should do the swap?
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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cpt logger
Member Joined: 23 Sep. 2012 Location: Western Colorad Status: Offline Points: 3003 |
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Unless you are into having this rig perfect as it came from the factory, I would use the original "replacement" engine if it runs well. If the "replacement" engine needs serious work, I might try to source a "correct" engine. I would do this only if the rest of the Jeep is very close to original. OTOH, If this were the case, I would sell the rig to someone who will take that journey with it. I have done that one time & that is enough for me. I am just not into that journey. I like to drive my rigs way too much to go that route again. Yet, I do see the value in that process, thus the sale. Otherwise, I would do whatever is needed to get the Jeep back on the road fairly quickly.
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2ndgearhero
Member Joined: 11 Jan. 2023 Location: Connectiuct Status: Offline Points: 30 |
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well, I compression tested the engine today and things are not looking too keen: Cylinder 1: 60 psi, Cylinder 2: 100 psi, Cylinder 3: 110 psi, Cylinder 4: 70 psi.
I am going to get a differential tester to narrow things down to where I am losing compression, maybe a head gasket (fingers crossed) If I am looking at anything more then I am also looking at yanking the motor anyway so if that is the case I can put the "correct" motor in
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"If the women don't find you handsome, then they should at least find you handy" -RedGreen
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cpt logger
Member Joined: 23 Sep. 2012 Location: Western Colorad Status: Offline Points: 3003 |
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When is the last time this engine was used on a regular basis? If it has sat in a shed for years to decades, the rings may not be seating as well as they could. I have had a few engines that had bad compression from sitting. The numbers were low like yours are with the serious differences that yours has. A differential compression test, a "leak down test", showed bad rings. Instead of pulling the engines apart, I added some MMO & drove it for a few weeks & about 500 miles. They smoked a bit at first, but after a while that cleared up & the compression numbers came up. I ran those engines for many years after that. This was in the PNW, so very comparable to your situation. IMHO, Since the FCT is a few months away, just driving it for a while is worth a try. You have nothing to lose except a lot of work & expense. Of course it is your Jeep, time, & money. Thus, you get to decide if you want to try this. IHTH, Cpt Logger.
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