A guy is cleaning out his dads garage and found it. He brought it to my shop to i.d. it. There are NO casting numbers or any other insignia. I'm a young machinist, so I haven't seen all the old stuff. His father used to work on studebakers. It kinda looks like IH to me. Interested in your thoughts.
Early pre-'49 Ford/Merc flathead, floating bearings, 3 3/4" stock stroke. Main and rod journal measurement would help ID correct year.
Ok, rod journals 2.138 and mains are 2.498 and my crude measure of stroke reveals 3.750". But my seal journal only measures 2.5" (has spiral oil groove)? And I guess what really threw me is that it only has one oil hole per rod journal? So I just assumed it was a 4 banger. Is it a early model, or was that standard and the new ones have two oil supplies?
The rod bearings 'float', as mentioned above. That means the bearing is free to rotate on both the crank and inside the rod big end journals. One wide rod bearing per journal accommodates both rods. Ray
Huh, never knew that. I have never had one in my shop yet, or seen one apart up close. Mainly ag around here, very few rodders. Thanks for the education guys! P.s. like your Buick ray. I have 50 hard top that is waiting for me.
I like the Buick too......But with a '50 Hardtop you are closer to having one like that than I am! That is a photo from a guy around Chicago who had a nice collection of older Buicks. I admired it so much I kept a photo and decided it made a good avatar. I have had, and have now, older Buicks, '38 and '41 models mostly....been a Buick fan since I was an adolescent.....and THAT was many years ago! What are your plans with your '50? Ray
Actually that rod journal diameter came out with Mercury in 1939. Ford got in in 1946. Both the 39 Merc and 46 Ford were 239 cube motors.
The 39-40 crank had two flanges plus the flywheel flange. One for the thrust bearing, one for the labyrinth oil slinger.