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'39 Buick Century - engine block number


C-Lamb
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Just a complete guess, but I would think that the most likely explanation would be that the engine was replaced many years ago by a Buick dealer. When a replacment engine block was installed the dealership would stamp the original engine number into the new block. Perhaps a careless mechanic picked up a "J" stamp instead of a "6" stamp and simply stamped the replacment block incorrectly.  

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Does look like a Buick factory stamp.  Re stampings are often not as straight/uniform. Or use b as a 6 and I for 1

1939 engines numbers start at 3572652

1940 engines numbers start at 3786214

With another digit at the start for series 4 - 6 -8 -9 (40 60 80 90)

Which would/should make your engine 6 3604223

 

Any casting numbers on the block?

 

Edited by 1939_Buick (see edit history)
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34 minutes ago, DonMicheletti said:

While not easy to locate, there is a second location for the engine number behind the water pump. The 2 numbers should match.

Here is a photo of the number, behind the water pump, on my '38 Special

Engine No. Front 1.JPG

 

  Excerpt the series designation is omitted I believe.

 

  Ben

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21 hours ago, 1939_Buick said:

Does look like a Buick factory stamp.  Re stampings are often not as straight/uniform. Or use b as a 6 and I for 1

1939 engines numbers start at 3572652

1940 engines numbers start at 3786214

With another digit at the start for series 4 - 6 -8 -9 (40 60 80 90)

Which would/should make your engine 6 3604223

 

Any casting numbers on the block?

 

Where would the casting number be?

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10 hours ago, DonMicheletti said:

While not easy to locate, there is a second location for the engine number behind the water pump. The 2 numbers should match.

Here is a photo of the number, behind the water pump, on my '38 Special

Engine No. Front 1.JPG

I guess I have to remove the water pump to see that?

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