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Old 02-24-2020, 03:01 PM   #1
Neil Mylar LakewoodCA
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Default Would a May29 motor have a 3 and 1/4 inch long ID pad?

Would a motor number A149XXXX, (May 1929) have a 2 and 3/4 inch long ID pad or a 3 and 1/4 inch long ID pad?
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Old 02-24-2020, 08:43 PM   #2
rotorwrench
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

Ford didn't make a lot of changes to the engine block during it's normal production run. Most of the blocks I've seen have a stamping boss the same width as the coolant port boss just below it. If there are variations, I'm not aware of them.

Replacement blocks were cast for many years after model A production ceased production and there is some consensus that Ford did not produce them. They are referred to as diamond blocks having a small diamond shaped casting mark behind the front right side of the timing chest. There might be variations among those.

Ford made a change to the valve chamber cover to lower the oil return tube location for May of 29 but it really didn't change the block. Changes are listed in the service bulletins as a general rule. Most changes were for oiling or cooling. Earlier in 29, the rear main cap was changed from a forging to a casting but that's about all I can remember.
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Old 02-24-2020, 09:33 PM   #3
Bob C
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

According to this link Ford went to the 3 1/4" pad in February 1, 1929.
http://www.plucks329s.org/pdf/studie...ND%20CODES.pdf


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Old 02-25-2020, 08:59 AM   #4
rotorwrench
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

That explains why I haven't seen any more narrow than the width of the coolant boss. I've not worked on any before Feb 29. Most of the changes were within the 1st 13-months of production.
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Old 02-25-2020, 11:18 PM   #5
Chuck Sea/Tac
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

Great article by Steve. I didn’t know this. There always seems to be something new to learn about these cars!
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Old 02-26-2020, 12:11 AM   #6
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

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Thanks Chuck...It was fun to do!

Here is another you might like:

http://plucks329s.org/pdf/enginebloc...ESCRIPTION.pdf

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Old 02-26-2020, 05:25 AM   #7
Neil Mylar LakewoodCA
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

Thank you guys for answering my question and especially Steve, for your research and your great article.
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Old 02-26-2020, 04:18 PM   #8
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Default Re: Would a May29 motor have a 3 and 1/4 inch long ID pad?

I used Plucks engine block PDF article to determine that a cylinder block I have with a altered # stamp told me that is was somewhere between March and September 1930, just following from one change date to another, thanks Pluck.
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