When did the rear flange (T899B?) on the oil pan assembly, change from this design....
to this design?.....
I know the change happened in either late 1911 or some time during 1912, but I could not find the answer in the chronological list of changes for the engine pan.
Because of Ford's "use it up" practices, I know there won't be an exact date or serial number for the change, but was hoping to narrow it down to a time of year that it occurred.
Thanks for any help.
My car, 85532, has the first design, as instructed by Kim Dobbins.
Thanks for the reply Keith!
My 12 is later than yours (#112908) and I was under the impression it should be the earlier design.
I suppose I could ask this question. Anyone with a engine number over 113000 with the earlier rear pan forging or under 113000 with the later rear forging?
Mark Herdman did a great series of postings earlier this year, detailing all the changes of the pan with pictures:
The first post covers this change, it's only dated as "late 1912"
Thank you Roger! You are my hero.
I obviously did not know about this body of research that Mark Herdman did on the engine pan/crank case. My hats off to him for doing this research and presenting this body of work so well!
Hind sight is always 20/20. I should have used "crank case" in my searches and I would have found it in the first place.
My 12699X has the later design.
The earlier one I think. ..
Anyone know the genesis of the word crankcase? I suspect it came about when the pan actually held the crank like eg,NRS cars. There the cylinders were bolted on from above. The aluminum crankcase held the crank and cam. Same with some other cars I've seen from the early period.
Richard I think crankcase was in common usage long before automobiles for part of a steam engine.
Thanks for the information. If enough information like this could be gathered, we might get a better picture of when changes like this were phased in.
Yes, that is the earlier rear forging.
Of your three 1912's, are any of the pans know or believed to be original to the engine?
A lot of early cars had a crankcase which was the lower part of the engine, then bolted to it was the cylinder block then the head was on top. Three separate pieces. The oil pan was bolted to the bottom of the crankcase.