Engine # help

Nov. 18, 1941 - MB100001 thru Mar. 6, 1942 - MB125809 NO EBAY or COMMERCIAL SALES.
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Romar
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Engine # help

Post by Romar » Fri Sep 13, 2019 4:02 am

Hi again,
could anyone tell me about this block number?
right side under oil filter is #641087 then L-W11 A N1-CR N2
on the left side towards the back down at the bottom is #7-25

on the head in the front if it is #6-48 under this number is #800376 and under that number is a tag that looks like it has 2 screws holding it in place with July 4 stamped on it and it also has the word JEEP on the head
thanks Romar
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Adam
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Re: Engine # help

Post by Adam » Fri Sep 13, 2019 5:59 am

Block is cj2a 1946 to 49 head is M38 50 to 52, The 6-48 These heads might have a compression ration on them, if not I dont know what that is, for a date it seems out of wack. Does it say willys too, or anything else? It should have a water outlet on the front side.

Adam
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Joe Gopan
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Re: Engine # help

Post by Joe Gopan » Fri Sep 13, 2019 7:21 am

6:48 is the compression ratio.mark on the head.
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Romar
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Re: Engine # help

Post by Romar » Fri Sep 13, 2019 1:58 pm

thats a great help,, thanks guys
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Bruce W
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Re: Engine # help

Post by Bruce W » Fri Sep 13, 2019 3:24 pm

Ben Dover wrote: ↑
Fri Sep 13, 2019 7:21 am
 6:48 is the compression ratio.mark on the head.
I’m sure that would be “6.48”. BW
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