Stovebolt.com Forums The Parking Lot Big Bolts What is my engine?

I have a 1954 W6400 series. I assumed it had a 261 in it. I looked at the boss where the engine serial number is. Now I am confused. What is stamped on the boss is FI03IJ. What does that mean? I need a new starter bendix and just wanted to make sure I got the right one, before taking the starter out. The Starter ID is Delco Remy 107634 6H6.

Let's assume you have a 1954 high-pressure 235/261 engine that has a valve cover that attaches to the head with screws through a bottom side lip (not two nuts attaching to studs through the top of the valve cover).

Here are locations of codes. [1954advance-design.com]
Find and post the following codes:
engine serial number - you already posted
block casting code
block date casting code
head casting code
head date casting code (you have to remove the valve cover).

Yes, it is a 235 or a 261. How do I tell which. In theory it should be a 261. How do I tell? The engine code is gibberish

Please find and post those casting codes.

Those casting codes will designate/confirm the engine size.

The date casting codes will tell us the year of the head and the year of the block.

When we know the block date casting code, we can then decode your Engine Serial Number.

Easy way to tell if it's a 261 is look for the captains bars cast into block. Deves tech net .com has good info on identification.

Jimcarteryruckparts.com has a technical article on the 261 c.i. with pictures

The engine stamped code indicates it's a '57 or newer block. If I have the digits right, it translates to F= Flint MI manufacture, 10 = October, 31 = day of the month (a Halloween engine!), and J is the code for a '58 or later 235 engine originally in service in a truck, Thriftmaster 235 with 3-speed transmission. Since the engine serial number doesn't carry a year code (after '56), the best way to date the block is from the casting date code sort of behind and above the starter. You will see a series of raised digits staring with something like CON4, which is only the conveyor that he engine went down in the foundry - doesn't help - but the next 4 to 6 digits can be decoded to determine the engine casting date. This info comes from the '58 Chevy Master Parts Catalog.

Doug

What is the block date casting code?

What is the head date casting code?

Those locations are shown at the link in my first post, above.

They will tell you/us the size and year (of both the block and the head).

once got catalogs from that supplier in phoenix ...patrick h dykes..? learned more about engine ID there than anywhere i know of...also told how to get an updated saginaw tranny fully synchronized ! nother story !

one other detail on 261 s that big remote oil filter uses 2 --1/2 inch pipe thread holes in the drivers side of the block on later models that is a give away along with captains bars