Curious about cylinder head marks

[David R.]

Just tore down two engines looking for a good rebuildable block. One cylinder head (from 1930 AA) has Ford USA in the casting, the other (December 1928) doesn’t appear to have any marks. When did the marks appear?

[Jack Shaft]

Ford script castings indicate 'service' parts made after A production ceased there should be some letters and numbers above the water pump outlet.

[David R.]

I figured it might be a replacement. It’s the better condition of the two and came from an engine that was rebuilt and renumbered to match original serial number.

[David R.]

Originally Posted by Jack Shaft

Ford script castings indicate 'service' parts made after A production ceased there should be some letters and numbers above the water pump outlet.

Do the letters and numbers have any significance?

[Gary WA]

Model 'A' Ford Garage ~ Model 'B' Ford Garage

[Gary WA]

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Go to Vince's site above in #5 has info on lots of items, may be of some help.

[Jack Shaft]

This is a service head made in december 28th 1936 (L is the month,28 is the day and the 6 is the year) Laying it next to a production head it appears the casting isn't as rough and the machine work is better. Ford was very exacting with their subcontractors,demanded quality.