Help With Engine Identification

Old Willy

Bigger Hammer
Jan 1, 2010
First Name
Willys Model
Willys Year:
My 1954 Willys Wagon was built as a Model 685 SW. According to the VIN and the "6" embossed on the hood ornament it originally had a 6 cylinder engine. It is now powered with a flathead 4 and I have no idea what year the motor was built.

I looked at the flat area on the block between the head and the water pump, but all that is there is a nice set of mill marks where someone decked the block during a rebuild and wiped out the serial number.

The distributor has a vacuum advance, but the ID plate is missing.

The flywheel timing marks read T.C. and 5 which my service manual says is the "LATE TYPE ENGINES",but what years are "LATE"?

Can anyone help me narrow down the year or years this engine was produced?

Old Willy



Sharpest Tool
Nov 15, 2009
Alpine, TX
Willys Model
Willys Year:
Can't help with the ID, but will trade you a "4" grill chrome emblem for your "6" if you want. My truck came with a 4cyl. and I put in a 6cyl.
I just tell everybody the 4 means 4wd :lol: