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Offline JohnR

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Engine date 1940?
« on: January 19, 2014, 12:36:32 AM »
Hi guys
Stripping down the Willys for sandblasting, and what I'm assuming is the build date on the oil pan mating area of the block is stamped 11 14 40 (of what is supposed to be a 53).� It is a timing chain motor, so I know it is incorrect for the year.� �Keep it, sell it or what?� This project is full of surprises!
John

Offline Mike S

Re: Engine date 1940?
« Reply #1 on: January 19, 2014, 01:39:44 AM »
It all depends on what you want from your Jeep. There is very little difference between the early chain drive and the later gear drive engines -- everything is the same except the distributor, oil pump, and cam. The heads my be non-ribbed on the military and early CJ engines.

I have a newly re-built chain drive (they were used up until motor 44,XXX - late '46) that is going into my '47. I also have the original gear drive engine for my '47, which I will probably rebuild next year.
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Offline SteveW

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Re: Engine date 1940?
« Reply #2 on: January 19, 2014, 08:27:03 AM »
I wouldn't sweat it too much. I have a utility engine in mine, except for the front plate was wrong and the po beat motor mount to where I couldn't do anything with it except weld an adapter it and make it work it is fine.
1950 CJ3A finished. 1950 CJ3A in pieces. 1947 Bantam T3-C trailer, 1946 Cushman Scooter 50 series

Offline F Bill

Re: Engine date 1940?
« Reply #3 on: January 19, 2014, 08:44:28 AM »
I think a 1940 build date would be a pre WWII engine from a Willys Americar or similar.....are there casting numbers or serial numbers you can share? Does the block look the same as newer engines or can you see the water jacket for individual cylinders??

Also some of the earliest engines had babbited connecting rods instead of replaceable insert bearings....Not worth the expense to rebabbit when there are plenty of new style rods around.
Owner of the world famous?? Pintojeep 3A and one yet to be named stock project 3A.
Based in central TX and upstate NY.

Online 1955CJ-5

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Re: Engine date 1940?
« Reply #4 on: January 19, 2014, 09:55:11 AM »
The number on an early engine is likely to be stamped on the side of the block on a pad between the oil filter can and the distributor, closer to and sort of behind the oil filter....

I looked at a 2a with a 441-xxxx motor, which was a 1941 Americar engine, and it ran like a watch....
1955 CJ-5, A friend for 58 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...

Offline JohnR

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Re: Engine date 1940?
« Reply #5 on: January 19, 2014, 11:12:50 AM »
Hi guys,
Serial number is 441 57 314.
Numbers cast on bottom of block:� 11-12 638632 W2 N1-CR N2
the head is also the non ribbed version.
Thanks,
John

Offline JohnR

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Re: Engine date 1940?
« Reply #6 on: January 19, 2014, 12:36:37 PM »
Head numbers are 337 014 W2.  Any info appreciated.

John

Online 1955CJ-5

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Re: Engine date 1940?
« Reply #7 on: January 19, 2014, 01:23:03 PM »
I've about exhausted my knowledge base....but there is some good info here:

http://ww2jeeps.com/htm/Lheadmain.htm
1955 CJ-5, A friend for 58 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...

Offline JohnR

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Re: Engine date 1940?
« Reply #8 on: January 19, 2014, 01:52:09 PM »
Thanks.

Offline F Bill

Re: Engine date 1940?
« Reply #9 on: January 19, 2014, 02:17:27 PM »
Quote
Hi guys,
Serial number is 441 57 314.
Numbers cast on bottom of block:� 11-12 638632 W2 N1-CR N2
the head is also the non ribbed version.
Thanks,
John

Yup, Americar, pre WWII chain drive engine. How many bolts on the thermostat housing?
Owner of the world famous?? Pintojeep 3A and one yet to be named stock project 3A.
Based in central TX and upstate NY.

Offline JohnR

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Re: Engine date 1940?
« Reply #10 on: January 19, 2014, 07:16:40 PM »
Two bolt thermostat housing.  Rods have inserts and aren't babbited, so that's one plus.