The CJ3A Page CJ3B.info

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Engine compartment / Re: These engines are tough!
« Last post by PercyUK on Today at 02:50:40 AM »
Or threaded nuts!!!
It was effectively running on two so I am hoping for some real improvement.
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Engine compartment / Re: F-head engine number CJ10125
« Last post by oldtime on Yesterday at 11:15:12 PM »
Given enough known examples from various timelines it may be feasible to estimate originality of unverified  engine numbers via the subtle font changes observed over time ?
As Bob brought up about the 1949 example, it clearly used a hyphen and also the top of the j was crossed. So given more examples we might suppose that those 2 traits may have been common during that period ???
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Engine compartment / Re: F-head engine number CJ10125
« Last post by Bob W on Yesterday at 06:36:14 PM »
Interesting serial number. I have never seen a CJ prefix before. Looks like the CJ 10 is kinda going up hill and then the 125 levels out. By the 1950s stock engine serial numbers were fairly straight. Of course special engines had hand stamped serial numbers. Oldtime's photo shows the 59th CJ-3A engine. This was probably hand stamped. Later on the hyphen was not included in 3Js. See Steve's engine for the common type 3J prefix serial number. Interestingly the two "1"s are different fonts. Below is an example of a 4J prefix on a 806279 block.

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Engine compartment / Re: F-head engine number CJ10125
« Last post by SteveKfl on Yesterday at 06:10:23 PM »
Here's one to maybe have fun with.  From my DJ3A where the frame assembly serial number falls around Sept 1961, I have often wondered if the engine was done in March 61 and over stamped with the "361", or does it mean something else?
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Engine compartment / Re: These engines are tough!
« Last post by Bruce_W on Yesterday at 02:35:43 PM »
Man, I really hate it when my pistons get knackered. 😉
BW
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Buy, Sell, Trade / 4 Free 15"rims, Syracuse NY
« Last post by Scott Blystone on Yesterday at 01:28:44 PM »
DM me if you want them.  They have tires on them that are no good.  They will need some elbow grease to derust, but are sound.
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Engine compartment / Re: F-head engine number CJ10125
« Last post by oldtime on Yesterday at 10:38:13 AM »
This looks to me like an opportunity to post up some known original engine stamping for comparison.
I only have a single engine stamping to donate for comparative analysis.
This one is from a very early 1949 CJ-3A.
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Your CJ-3B Project / Re: My 1963 CJ3B Build Thread
« Last post by Scott Blystone on Yesterday at 10:12:29 AM »
Nice story.
I wanted to tell you that after 5-6 yrs running the Pertonix, I finally put their 40000 Volt coil in.  Not sure why, I bought them at the same time.  Anyhow - it does make a difference.  Really need to spread the coil mounting bracket to its limit though. I run 7mm copper wires.

Also, on your carb.  I posted this elsewhere, but WillysAmerica has new ones on their website for $200 from warehouse in Turkey from the 70's.  Exact fit for 3B.  I love mine - way better than any rebuild I did on mine or the Solex I used for years.  I even bought some extra ones for future projects.

Happy Jeepin.
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Engine compartment / Re: F-head engine number CJ10125
« Last post by derekredmond on Yesterday at 10:07:29 AM »
Thanks guys.

Could maybe have been stamped when rebuilt, but this does look like a factory stamping, and mostly if they get machined off they are just left blank. 

Derek
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Engine compartment / Re: F-head engine number CJ10125
« Last post by 64CJ5 on Yesterday at 09:15:33 AM »
Could the block have been machined and lost the original stamping and then been re-stamped? 
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