What do these numbers on the rear/top of the engine head mean? Thanks
MY granddaughter says that they are six two eight!
My other granddaughter says six two nine!
Cast 29th of June.
My wife says six minus twenty nine is minus twenty three!
Grade 8 bolts. Not proper for the T but, as the strongest bolt you can get, you're not gonna have to worry about breaking them. Jim Patrick
While grade 8 are overkill for the Model T, these are the BIG guys of the bolt bin.
Regards
Art
If you think grade eight head bolts is overkill just wait until you break off a few.
Oh Yes Aaron - paid my dues looking up at the belly of TD18's and 24's with a drill in my hand.
Topside drilling has got to be easier <@^@>
Be sure you are not buying chinese made grade eight bolts, they can be anything from extra soft to extra brittle.
Best
Gus
Art, the TD18 and TD24 reference brings back some memories from my childhood days. While I never had the "pleasure" of working on them myself, there was one of each in this area. The TD18 belonged to my best friend's Dad (the one on the TT with me on my profile picture). There are many stories about both of them. I HAVE had my share of drilling looking UP on other things though!<g> Dave
By the way, my '25 coupe that I bought at his estate sale has Cat bolts for headbolts on it. He was a Caterpillar mechanic in his younger days. Dave
You comics think maybe, just maybe, he's talking about the casting number on the head?
The casting date is June 29th of an unknown year. The 1 above is likely a mold sequence number, ie Mold core #1 was used to form this side of the part.
Your head casting date would likely be within a few weeks of the engine casting date which would have the month / day / year.
Engine block casting dates with year was dropped on US cast engines about the time when the one piece valve cover was introduced in 1922, I think?
My Canadian eng. shows a 7 9 on the head and 312 l9 on the side of the block
the 9 on the block and the head correspond with each other the serial# C 1896xx which i've been told is january 1919. So is the head july '09? or '19? is the block 3rd of dec. '19? what is the other thing in front of the 9? an I an L or a / ?
No, the block date is 6 29 or June 29th of an unknown year. Ford did not include a year in cylinder head date markings after about mid 1912.
Sorry, I meant to say cylinder head date.
John, does the head or block have Made in Canada on it? A larger area photo would be great.
There is a possibility that the head was cast in 1929 as a spare part in Canada.
The motor number indicates made in US.
Royce:
I am not sure if you meant to say it but so far as I know Ford did not show a year in their cylinder head dates at all or at least none of my early heads have a year cast into them. I have mostly 1911 and 1912 heads to go by and none of them have a year.
Rik,
reading your thread seems to have generated some confusion to you question,
the head number is that of month and day, the engine # is Canadian and the casting date on it is 12th day of March 1919.
John,
You are correct as usual! Here is a 1912 head showing a date of 12 4 (December 4th, no year)