Curious about cylinder head marks
 

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?

Re: Curious about cylinder head marks
 

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

Re: Curious about cylinder head marks
 

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.

Re: Curious about cylinder head marks
 

Do the letters and numbers have any significance?

Re: Curious about cylinder head marks
 

Re: Curious about cylinder head marks
 

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

Re: Curious about cylinder head marks
 

https://i.imgur.com/wkuMrOl.jpg?1

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.