Diamond block casting codes?

29ModelA

29ModelA

Well-known member
i was just shown at a show today that my car has a diamond block. Is there a webpage to decode the casting number? It appears to say L-261 as I would like to learn more about them now. I also have a number stamped on my pad, but I am guessing it is a rebuilder number as it starts with R if I recall.

I am guessing that it has low miles/hours as it runs very strong, and had no carbon ridge when the head was removed before we revived it.

Now I am reading that it may have a B cam etc... in it, which might make sense as someone had also put a B carb, generator, and maybe a B dizzy on it, however it seems info is all over the place - at least on the web.

Thanks,
 
Mike V. Florida said:
December 26th 1931
L= Dec
26= 26th
L=1931
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Cool, thank you. It is older than I suspected, kind of surprised it got a new block put in 3 years almost to the day after it was built. (assuming that is when the block was actually put in, and not a core from later)
 
29ModelA said:
Cool, thank you. It is older than I suspected, kind of surprised it got a new block put in 3 years almost to the day after it was built. (assuming that is when the block was actually put in, and not a core from later)
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Not surprising. Fill it with water, let it freeze, break the block.
 
MikeK said:
Not surprising. Fill it with water, let it freeze, break the block.
Click to expand...

The car was always in Southern California though, Lived it's whole life there, it moved to Michigan in 1968 and taken apart but never was filled with water/coolant driven or even titled/plated.
 
29ModelA said:
Cool, thank you. It is older than I suspected, kind of surprised it got a new block put in 3 years almost to the day after it was built. (assuming that is when the block was actually put in, and not a core from later)
Click to expand...

Weekend trip to Big Bear in January 1932 ends badly? New engine installed to replace cracked block..
 
Mine has J 6 7 B block is this 6th jan 1937 ? Does anyone have a list re day month year . Thanks, 50 days to go 60 till speed week. Derek from cold NZ 60*
 
I read Vinces site & yes now understand J is october no excuse . here we put the day- month- year , not month day year, but then some drive on the wrong side of the road too, all good fun thanks .
 
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